Jq index of element , document. 1. With this example: [111, 222, 333, 444] I want to change the 3rd element (or other If you use the . In the single-element syntax you need to wrap it in an array. ["$"] ' also works, what does pipe do exactly in this case? From the documentation: The | operator combines two filters by feeding the output(s) of the one on the left into the input of the one on the right. Use index(). 4. [index] syntax, but omit the index entirely, it will return all of the elements of an array. By default the search starts at the first element and ends at the last. 获得元素相对于选择器的 index 位置。 该元素可以通过 DOM 元素或 jQuery 选择器来指定。 语法 $(selector). Asking for help, clarification, or responding to other answers. fromIndex Optional. select ids before id 1 should return 2, 3 and 5. closest('. With clear and concise instructions, you'll be able to use jq to access the elements of an array using a string in no time. expr2 ) in Javascript) or list comprehension The variable declarations in array patterns (e. slice- These can be used to get an element from a given jQuery collection:nth-child - Select an element which is the nth child (!!) element, respective to the parent. Is there a one-line solution with JQ (e. Array indexing has some helpful convenience syntax. Zero-based index at which to start searching, converted to an integer. 说明. messages |= [ values, to, prepend I have a table where cells have a clickable area. []?). name,. I would like to get all of them as full objects. fruit | index( "orange" ) However, if the item of interest is itself an array, the general form: ARRAY | index( [ITEM] ) should be used, e. So for example I want to find all objects with type. Follow Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Parameter Description Type; element: The DOM element or first element of that type within the jQuery object to look for. You can use the `-n` option to specify the index of the element you want to get the length of. Share. jq Cheatsheet. Usage is as simple as 如果不给 . col'). index(this); JSFiddle here. 技术细节 返回值. index() 方法，则返回值就是jQuery对象中第一个元素相对于它同辈元素的位置。. eq, :eq or . How should my jq query be formatted? Thank you Similar to this problem except I am trying to include objects before and after the matched objects. 2. NOTE: This should be cross browser compatible, and will also likely be faster than any JQuery alternative. json Prints the length of the array of objects. Add a comment | 2 . SYNOPSIS. It looks like jQuery's index function should work regar So here I called . [-1] gets the last element; . @user35202 There are two criteria an element from the outer array has to meet to be selected, and both have to be true (hence the use of and in between). json is a bit more readable than <file. These two properties will simplify our code by a ton, shown on the following code. index('. How can I get the index of particular "selCat" on a change event ? I need to know the index because I need to assign specific value based on previous dropdown value to "sub" class of particular index. Retrieve an element from an array with a bracket expression: . Array[1,3,5,11] ) but in general you can use a more sophisticated filter as the argument to del. [index]' someData. player'); Or, you can tell jQuery to search for a specific element inside of an array: How to get index of element has specific child using jquery? 0. Names[] | contains ("data") unpacks the . In your case, eq or :nth-child are suitable. children(). jq [options] filter [files]. NAME. ' . 1,091 4 4 gold badges 18 18 silver badges 33 33 bronze badges. 5. index() 方法传递参数，那么返回值就是这个jQuery对象集合中第一个元素相对于其同辈元素的位置。 如果参数是一组DOM元素或者jQuery对象，那么返回值就是传递的元素相对于原先集合的位置。 The output from the awscli command is of the format. : [1, [2], 3] | index( [[2]] ) #=> 1 IN/1. categories | INDEX(. map(options ,function(option) { return option. Share Improve this answer This iterates through all the children and their element with index value can be accessed separately using element and index respectively. Follow edited Mar 28, 2023 at 12:28. . css() directly on the . 如果参数是一个选择器， . |f|f, . I'd like to select one value from one such object based on the appearance of a different value in another object, where the two objects are related by one of those UUIDs. k2[]) there has to be at least one (any) that has a field called a2. )’ data. json # supports negative indices, i. 255. gallery-item"); var index = items. Image. Just start with . [-2] is the second last. You are trying to find the active class in the child Element to locate in the array. To get the index of the clicked element, get the closest ancestor . What are you going to use 0, 1, 2 etc for? Can it be replaced? b) introduce a variable outside the each scope and manually increment it inside the scope. jq 'map(select(any(index("a"))))' file This selects each sub-array in which at least one ("any") element is the string a. length is used. I want to find the index of a specific element from that JSON array by JavaScript/JQuery. # for which f is truthy, else null. [] above to inputs, e. doc. For example: [ { "w" : "Hello" }, { "w" : "World } ] jq里面each()的index和element到底是什么意思,具体什么用法each是jquery的方法，比for要简便。首先选择器选出来的是数组元素，通过each的回调函数来操作数组中的每个对象，可以修改属性或者绑定事件。index数数组元 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company 从0开始，返回的是DOM对象，类似的有eq(index),不过eq(index)返回的是jQuery对象。 这能够让你选择一个实际的DOM 元素并且对他直接操作，而不是通过 jQuery 函数。 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company How to update a element in array by index with jq? Ask Question Asked 5 years, 3 months ago. (more precisely, it's greater or equal because indices start at zero). jq: Cannot index array with string "id" 5. Names array of each element and checks whether each name contains the text data. 117k 21 21 gold Count elements in nested JSON with jq. index(element) 亲自试一试 I want to get the index of the A in the array of 6 (so I can detect which A has been clicked, for example), but when I use . Also using a shell variable with double quotes is not a right way to import JSON shell content to your jq program. response[3]. Note, the array is still searched from front to back in this case. [-1] gives you the last element. jq lets you select elements in a JSON document like it’s a JavaScript object. It does exactly the same thing as Is there a way to get the index of class name (I. A straightforward solution (pointed out by @peak) is to use the builtin function, index: The jq documentation confusingly suggests that index operates on strings, but it operates on arrays as well. For instance, running the command jq 'map(. elem[0]. index() without parameters gives the index of the element with respect to it's siblings, which is what you want in this case. []: def INDEX (idx_expr): INDEX (. jq can accept text input as well, but by default, jq reads a stream of JSON entities Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. (2) If your jq has inputs: use the -n command line option, and change . foo[] is equivalent to . Element: selector: A string representing a jQuery collection in which to look for the first element matching the specified selector. The SQL-style operators don't work well for me as a straight-forward selection mechanism; I believe they have a very specific use-case, for which they are uniquely suitable for, and for anything else they're (at best) clunky. [] with the input [1,2,3] will produce the numbers as three separate results, rather than as a single array. |f|f|f, so long as the computed value satisfies the condition. index() 方法传递参数，那么返回值就是这个jQuery对象集合中第一个元素相对于其同辈元素的位置。 如果参数是一组DOM元素或者jQuery对象，那么返回值就是传递的元素相对于原先集合的位置。 It's like indexOf but just without the Of it returns the index of the element if it exists, and -1 if it doesn't. ( for the whole document) and drill down to the value you want. Array indexing is zero-based. When called without an argument, recurse is equivalent to recurse(. How can I access the element at position index when the value of index is dynamic, such as when in loops?. [2: I have an array of objects of various types which reference one another with UUIDs (a terraform. t' t for a But this can be simplified to a single jq invocation, first incrementally to: Your idea was right, but by virtue of using + on the object at first index, you lost the objects at other indices. active"). ["indexNumber"], modifying elements with In this example, we’re using the echo command to Many of the previous answers work by avoiding to create a stream of objects in the first place. length-1]. [-1] ' 3 在jQuery中，我们可以使用index()方法来获取当前jQuery对象集合中“指定元素”的索引值。语法 说明index()方法可以接受一个“jQuery对象”或“DOM对象”作为参数，不过一般情况下，我们很少会使用到参数。当index()不带参数时，一般指的是当前元素相对于父元素的索引值。 Doesn't "last" in a JSON object make no sense? The object is an unordered set, and a processor is not required to maintain order. For example you can access the entry point of the data or output you have with jq '. The first line selects all of the checkboxes and puts their jQuery element into a variable. The `[]` operator takes two arguments: the index of the element you want to access and the array to search. I'm looking for a function like foo below that accepts an array of elements and returns a jQuery object with them in it. You can also use the `jq` command to get the length of a JSON object. indexOf() 方法會回傳給定元素於陣列中第一個被找到之索引，若不存在於陣列中則回傳 -1。 This checks every element in the array and gives a response. If its the "first" object to be added, use the object designator . , no pipelines) or undertaken with great care. containers[]. before() and . and then emits in turn . You can also use this on an object, and it will return all the values of the Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog The `jq` command line tool is a powerful and flexible utility for working with JSON data in Linux. jq - Copy values of first array element if other values are null 1 jq - How do I print the entire index of a JSON array in the correct order, instead of printing all of one specific field one after each other? @TheSheekGeek: See my note on one of the other answers, as long as you're aware you're relying on undocumented behavior that can change at any time, and you're mucking about with the order of jQuery's stored elements, which is going to have knock-on effects as many jQuery methods guarantee things will be done in a specific order. index() 方法返回指定元素相对于其他指定元素的 index 位置。 这些元素可通过 jQuery 选择器或 DOM 元素来指定。 I need to wrap up an array of elements into a jQuery object as if they were selected so that I can call various jQuery actions on them. text file. Addresses[] | index("255. If the element doesn't exist in the array, the filter returns Slices an array on by index. The elements can be specified by jQuery selectors, or a DOM element. [0] to add the records of your choice. A filter of the form . 5 and jq 1. e to get element at index 2 # doesn't support negative indices jq -n '[inputs] | nth(2)' a. // Do something with the element at index “index” How do I access the elements of an array in jq? A: You can access the elements of an array in jq using the `[]` operator. You can, however, manipulate the ordering of elements. Return Values（返回值） 如果不传递任何参数给 . propertyFromJSON }. as [$first, $second]) bind to the elements of the array in from the element at index zero on up, in order. Evidently, in the title of the Q, the OP was using the word "objects" in a generic sense. But what if you are starting with a stream of objects—for example JSON-formatted application logs? If your input file (or stream) has multiple objects in it, all you need to do to choose a single entry from a stream of independent objects is to use the --slurp option (or -s In the jq manual, there is a hint about the semantics of index under the heading indices. When you set an elements position but do not define the z-index value, then z-index is interpreted by the browser in terms of the order of the elements appearance in the DOM. jq: Cannot index array with string Cannot iterate over string. index() 返回值就是原先 But more generically, I'm trying to understand how jq would allow for selective array element control. MyClass'). index( element ) element. jq can transform JSON in various ways, by selecting, iterating, reducing and otherwise mangling JSON documents. json It works fine, but each time I have to enter the number . You could do away with wrapping index() Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company jQuery element 选择器 jQuery 选择器 实例 选取所有 <p> 元素： $('p') 尝试一下 » 定义和用法 element 选择器选取带有指定元素名称的所有元素。 语法 $('element') 参数 描述 element 必需。规定要选取的元素。 尝试一下 - 实例 选取. k2), meeting No two elements can share an index, and no element can have an index greater than the total count of elements in an array. []; idx_expr); This feels like a nice convenience redefinition, and I get the feeling that this version might see more use in a pipeline context. We can also use the select() function to filter our selection based on the index of an array. length’ [1, 2, 3] 3. How can I do it with JQ? I tried the select and index options, but was not successful. In general, it would be better to use 'index' to test if an array has a specific value, e. jq Cannot index string with string "value" 114. 2k 1. |f, . Hot Network $. response[]. Some of ways below for different circumstances. 如果在一组元素上调用 . Use $('. The function is invoked once for each element. role==master => record type for each element: if The index() method returns the index position of specified elements relative to other specified elements. Basically I want to sort the array but the relative position of specific elements should be unchanged. map( item => item. In brief, the seemingly buggy behavior is actually a “feature”. Either the first or last index can be omitted to go from the begining or end. Since the top-level array could potentially contain several sub-arrays that contain the query string, I'm assuming that what you want is a top-level array with each sub-array that contains the query string:. ready or wrap it in a function and run it that way (probably cleaner). Cannot index string with string "foo" I want to re-position elements of an array (change index of array elements) based on a condition. pets[0] | select(. var elements = [element1, element2, element3]; $(foo(elements)). jq: error: Cannot index array with string. items[]|[. In this case I would like to have the element with the id 2345, because the keyword "blue" occurs in the string, and it is the first match. 6, so if portability across different versions of jq is important, then usage of del/1 should either be restricted to the least complicated cases (e. [0] notation. Get index of element properly. jq - Command-line JSON processor. Side Note: Array Indexing in jq. This will output the following: 定义和用法. Meeting the first deselects the third item (no . jq -r ' . We can do that by using the index of the element as follows: jq ‘. [-1] will Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Negative array indexing works just as it does in python, so . I'm also on the cat file. Names array of that element has the word data in it. index; it'll tell jQuery to search inside that for your element. index() 返回值就是传入的元素相对于原先集合的位置。. selectedIndex property of your select element directly: case 'VA': selected. If no argument is passed to the . pixels? Using index works, but personally I wouldn't use it. index(); Here items. The indexOf() method returns the first index (position) of a specified value. written in portable C; 0 external dependencies. Follow answered Jul 8, 2010 at 14:05. [10:15] returns 5 elements starting from index 10; the end index is Output all elements from arrays (or all key-value pairs from objects) in a JSON file: I'm stuck on the following json with jq. data. How to select/get object elements' (array of objects) keys based on value of an element in an object in the aforementioned array in jq? 1. I hope this article has been helpful. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. There's something about figuring out if an item is in a collection by looking for it's index that feels wrong to me. row class, index() returns the index 0 as it is zero-based. For example, cellIndex will return the column index of a td element and rowIndex will return the index of a tr element. Your last example with . def To get a specific element in the array, give jq an index: Checking an array for a specific element. name='pass', plus any object that is within X (say 2) of this object, either before or after. var index = getArrayIndexForKey(array, "id", "bb"); //index will be -1 if the "bb" is not found Here is a working example. 2k bronze badges. != null) and can be used without concerns about recursion depth. currentPlayer'), index = current. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Any number of indices may be specified in this manner, and the order in which they are presented will determine the order of the items in the result. index() is called on a collection of elements and a DOM element or jQuery object is passed in, . EDIT: This is not a duplicate of Add new element to existing JSON array with jq, which is about appending/prepending elements to arrays. (1) All versions: use the -s command-line option. Viewed 990 times -1 . children() set, and instead of a number for the 'left' value, I gave a function. Well, this method modifies the original array (removes the first Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Add Two Numbers Count Words Reverse a String Sum of Array Elements Convert String to Array Sort an Array Find Array Average Find Smallest Element ArrayList Loop HashMap Loop Loop Through an Enum Area of Rectangle Even or Odd representing the index position to start the search from: char: An int value, representing a single character, e. [2]' someData. . jq: select without dropping items from array. text, . If the key isn't a numeric index then your data is not an array but an object. Eg: 如果不给 . First the user will select a option where the val Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Thinking of newbies cat file. Hot Network Questions For this purpose you don't need to be doing anything with options, you can change the selected element by setting the . Either index may be negative (in which case it counts backwards from the end of the array), or omitted (in which case it refers to I have tested your code in jsfiddle . Their index is not always the same: { "address": "localhost", "name The array returned by . What I want to do is, when in a loop, call jq to access an The commands follow common syntax such as, creating arrays and adding elements with echo '[]' | jq '. selectedIndex = 0; break; // etc. click(function() { How can I search myArray to find the index of the element whose hello property equals 'stevie' (in this case, the result should be 1)? javascript; Share. fn. json. Thus index(true) returns the index of the first true in the array of booleans The commands follow common syntax such as, creating arrays and adding elements with echo '[]' | jq '. Provide details and share your research! But avoid . You need to use the append operator +=. ["indexNumber"], modifying elements with . Surya Surya. But the value index is static, say jq '. A slice is a sub-sequence of the array. index( element ) If a selector string is passed as an argument, . index() Demo What I Learned: Object Identifier-Index. image]' This gets me output like the this: A quick and simple extension for jQ to turn this process into a method: $. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Have jq return the index number of an element in an array. Use the index filter to get the index of the first occurrence of an element in an array. (Assuming this is a single-select select element. Filtering by Index. If your version of jq has inputs then (2) is recommended. index(element) 参数：它接受可选参数“element”，该参数用于获取元素的位置。 返回值：它返回一个整数，该整数表示指定元素的索引。 jQuery代码显示index()函数的工作方式： Try jq, a lightweight and flexible command-line JSON processor: jq length /tmp/test. response[1]. The key property is literally the index. How to extract string from array with jq? 1. text etc. jq; Share. So does this: echo ${single_ip_set} | jq -c '. Elements loaded last, will display above elements that preceded it. Hot Network Questions Where is an Note that index() has an optional element argument:. The graph is displaying operations per second, not time per operation. for each element: if element. response[2]. price) | add' will take an array of JSON objects as input and return the sum of their "price" fields. tx' | jq -r '. Use JQ to select an array entry by value. 元素的 index，相对于选择器. 3. Please feel free to leave any comments or questions below. find(". 631k 138 138 gold badges 1. The indexOf() method returns -1 if the value is not found. of my requested IP. ' select(<condition>) keeps only those elements where the condition is satisfied. 👍 66 mthmulders, kiennguyen94, himu62, snobear, sks, tdmalone, sunapi386, mukunm, AlexeiBlue, falnyr, and 56 more reacted with thumbs up emoji The -r option should not be used if the output will be fed into another JSON parser; only the last jq in the pipeline should use it – otherwise you risk feeding non-JSON data into the second jq instance. Jq provides to_entries and from_entries to convert between objects and key-value pair arrays. peak. indexOf() 方法从头到尾检索字符串 string，看它是否包含子串 substring。开始检索的位置在字符串 string 的 start 处或 string 的开头（没有指定 start 参数时）。 I want to return the first element which has a keyword that can be found in the string. I don't know how to translate this to jq which is more of a functional language. I'm going through a Kubernetes tutorial and am using jq to filter some of kubectl's exhaustive output. How to find the current element index which is dynamically generated? 0. Another Native JS way to do this is using TableData properties that can be found when using table elements. You can select ranges: $ echo "[1,2,3,4,5]" | jq '. value; }); You can add change options to $('#selectBox option:selected') if you only want the ones that are selected. In the range-syntax you need to additionally providde the to-index (which is one higher than the from-index if you want just 1 element): jq 'to_entries[0:1] | from_entries' Demo. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. JQ Error: Cannot index array with string "pc" 2. index() returns an integer indicating the position of the first element within the jQuery object relative to the elements matched by the selector. So for each value that you're looking for, you'd want to check if it's index is > -1 (which means it's found in the string). Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company If your json contains a list of objects, jq allows you to access such elements using an array index filter jq '. If your jq has IN/1 then a better solution is to use it: Return Values. jq can accept text input as well, but . index() I get the index of the element relative to its parent. Modified 5 years, 3 months ago. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. The syntax looks like this: { myPropertyName: . jq: for JSON . When there is no value at the index for The [ expr1[]. json is a mock and when the script goes live, it will replaced by the real data source that might contain cleanup and filter commands all piped together and that jq is just the last part of a bigger equation. I want to get all the values at once (200 values) But when I do: jq . The parameters represent the index of the current iteration, and the current jquery获取元素索引值index()方法：jquery的index()方法 搜索匹配的元素，并返回相应元素的索引值，从0开始计数。如果不给 . json It gives an error: Cannot index number with string "text" The file looks like this: In jq, can you get objects back in a list, so you can index them? 1 Can jq check each element of a comma seperated array of values to check if the value exists in JSON? jQuery index()的例子 index()是jQuery中的一个内置方法，用于返回与选择器有关的指定元素的索引。 语法: $(selector). Your input is not an array of objects, therefore you can't access with the . Get elements from a Jquery selector via index. children('. Another commonly used method is shift() but you should avoid using this for the purpose of accessing the first element. Follow answered Oct 14, 2011 at 13:31. Use to_entries, from_entries and an index of your choice. after() functions. CHEATSHEETS ABOUT 中文. Follow edited Sep 25, 2018 at 19:59. Let’s say we only want to select the first pet from our pets array. col and call index on it. One task that's coming up is to show what images are deployed to what pods, using kubectl get pods. Hot Network Questions Surmounting the mountain range from the sea Meaning of "οἱ" in a passage from Xenophon Does mud stick less to trail running shoes? Why is gender diversity promoted in the sciences to "denounce the lack of women Get the length of an array with multiple elements: $ jq ‘. e. 3k 1. Maybe next time I want to delete array elements 1,3,5 and 11. 8")' I really just want one final answer as whether or not the array contains one instance. An easy way to do so with jQuery would be the . length <= fromIndex < 0, fromIndex + array. g 'A Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company According to jsPerf: Last item method, the most performant method is array[array. So in this case, you could just use this as that argument: $(this). Type: Element or jQuery The DOM element or first element within the jQuery object to look for. []. You get an effectively random key/value pair, unless you have some kind of guarantee that the object has its key/value pairs always in the same order. item: index() get the index of the element in the parent. community wiki Matt 0. Negative index counts back from the end of the array — if -array. index( $(this) ); return index; } Run this on document. So far I have this: kubectl get pods -o json | jq '. For instance, running the command jq ´map(. Running . yourArray[0] but this requires you to check if [0] actually exists. 6. In pseudocode, it’d look something like this : element = jq '[$i]' $array echo Here's a general-purpose function to get the index of something in an array: # Return the 0-based index of the first item in the array input. t seems correct and works with jq 1. When clicking on that area, I need to get the index of the parent cell among its siblings. [0]. Using jq to get arrays where a key within the array is equal to a specific value? 0. Here’s a simple The variable declarations in array patterns (e. Negative indexes count backwards from the end of the array: . Basic Info. – karatedog Learn how to index an array with a string in jq using this simple guide. As there is only one element with . As is the case with some languages and libraries, -1 positionally refers to the last item in the array. This guide covers the basic usage of `jq`, including accessing JSON properties, working with arrays, slicing data, using functions, and converting between JSON and JSONL. Array/Object Value Iterator: . The elements below are sorted descending by some timestamp (not included in the json). ) Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You can also use :checked for <select> elements. – peak. IPSet. An alternative syntax is to iterate the existing values together with the new value(s). parent(). And INDEX/1 is just a call to INDEX/2 with the first parameter set to . The condition is that at least one name in the . Note: If the element is not found, index() will return -1. $ echo ' [1,2,3] ' | jq '. index() method, the return value is an integer indicating the position of the first element within the jQuery object relative to its sibling elements. The actual output contains about 40 array elements and more than 1 satisfying the above conditions. index() returns an integer indicating the position of the passed element relative to the Get the index of a given element, and apply logic, based on it. with various pipes)? I'm not looking for a solution with loops. If the input consists of a stream of JSON objects, then the above solutions can easily be adapted, depending on the version of jq that you have. recurse(f; condition) is a generator which begins by emitting . en / cheatsheets / jq. I found that you are getting -1 because the element index that you are trying to find doesnt exist in that context : var items = $(". When there is no value at the index for What I want to do is, when in a loop, call jq to access an element at some index that I specify. getAttribute('value') You don't even have to get the index and then reference the element by its sibling index. Using contains makes more sense to me, but in light of this information, it wouldn't be ideal in this case. How do I do this jq? Either by index or relative to other objects. index(this); DEMO Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You can pass a selector to . jq '[to_entries[0]] | from_entries' Demo. 如果在 string 中的 start 位置之后存在 substring，返回出现的第一个 substring 的位置。 如果没有找到子串，则返回 -1。. Subset json based on string list of indices using jq. If . getIndex = function(){ var index = $(this). The indexOf() method starts at a specified index and searches from left to right (from the given start postion to the end of the array). get'). 3k silver badges 1. Improve this question. 在jQuery中，我们可以使用index()方法来获取当前jQuery对象集合中“指定元素”的索引值。语法 说明index()方法可以接受一个“jQuery对象”或“DOM对象”作为参数，不过一般情况下，我们很少会使用到参数。当index()不带参数时，一般指的是当前元素相对于父元素的索引值。 if you want to use jq itself you can you jq features. @Fo - In the body of the question, the OP was quite specific: 'I want to get the "name" elements of the objects'. Your choices are: a) rethink and redesign the solution. As stated, I want to insert an element. tfstate file). This is arguably better or worse:. $(this). g. You could slurp the whole input with -s, but you can also use inputs with -n (null input mode) and get the nth element by specifying the index, i. Use jq to find array element by containing string. id | . How to extract JSON object from JSON array using JQ. querySelector('select option:checked') document. jq is a powerful tool that lets you read, filter, and write JSON in bash The most useful bash commands for front end development While being a front end developer doesn't mean you should be a command line expert, knowing a little bit of bash has gone a long way for me SYNOPSIS jq [options] filter [files]. index(element) 参数：它接受一个可选的参数 'element'，用来获取元素的位置。 返回值：它返回一个整数，表示指定元素的索引。 jQuery代码显示index()函数的工作： 代码 #1: <!DOCTYPE h Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I need to delete all elements of instances that are either set to "three" or "five". expr2 ] pattern is generally useful whenever you want to transform one array into another, like a map (e. filter('. Firstly, there has to be a field called k2, and secondly, from the items within the array in k2 (. types. foo | . Follow answered Mar 17, 2019 at 13:44. Looking at how it might be used, with the same data, I get this: jq '. numpy array/item handling functions Is this a polished enough answer to, "Why do you want to leave?" How to prevent color precision loss when writing to bpy. find will return nothing but empty jquery object. , . $ cat json | jq '. Then you just ask for the output field of that object and you're done. [2] gets the third element. Select value from array json using jq. var player = $('. index() 方法传递参数，那么返回值就是这个jQuery对象集合中第一个元素相对于其同辈元素的位置。如果参数是一组DOM元素或者jQuery对象，那么返回值就是传递的元素相对于原先集合 because the in operator checks key from an object only (or index exists? from an array), here it has to be written in an object syntax, with desired keys as keys, but values do not matter; the use of in operator is not a perfect one for this purpose, I would like to see the Javascript ES6 includes API's reverse version to be implemented as jq Converting a JSON array from a PHP array by json_encode. Here is an example. I parse a json file with jq: jq . surfmuggle. Output: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The return value of the indexOf() function is the numeric index of that value in the target value, or -1 if it's not found. index() ，并且参数是一个DOM元素或jQuery对象， . price) | add´ will take an array of JSON objects as input and return the sum of their "price" fields. You can also use this on an object, and it will return all the values of the object. To delete elements 1,3,5 and 11 just use. So for the 5th A I get the same index as for the 2nd, because te 5th is actually the second in its group within its div. 79. recurse(f) is identical to recurse(f; . del( . index() returns an integer indicating the position of the passed element relative to the original collection. E. json side as mostly that file. map is probably the most efficient way to do this. name index()是jQuery中的内置方法，用于返回指定元素相对于选择器的索引。 用法: $(selector). 5,954 8 8 gold badges 56 56 silver badges 90 90 bronze badges. var options = $('#selectBox option'); var values = $. String. expr1. If you need to access the val later using the Another approach is to use an array index expression to positionally grab the last element of the array. I need to select the ids before id X. [10:15] will be of length 5, containing the elements from index 10 (inclusive) to index 15 (exclusive). +=', indexing with . Nick Craver Nick Craver. player'), current = player. spec. It is common (but wrong) for developers to think the performance of a single operation matters. Select nth element from multidimensional JSON array with jq. e. It allows you to parse, filter, and transform JSON data easily. metadata. [] If you use the . Improve this answer. 0. querySelector('select option:checked'). For example, to generate all the integers, at least This selects all the array entries with the given key as its first element and then extracts the value, the last element, from each piece chosen. That is, the following illustrates the intended behavior: Description. In most normal cases, the simplest way to access the first element is by. Given an array of objects, I would like to inject a property with its position in the array. jq: index/1 not working when element is an array. the third element with the class "className" would be 3 without using jQ? I don't know jQ, and I don't have time to learn it right now, and I don't want to include code into my code that I don't understand at least some. ["indexNumber"] = "New Value". Each section includes detailed The implementation of del/1 has proven to be quite difficult and indeed it changed between jq 1.
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