JS Web APIs Web API Intro Web Forms API Web History API Web Storage API Web Worker API Web Fetch API Web Geolocation API JS Browser BOM JS Window JS Screen JS Location JS History JS Navigator JS Popup Alert JS Timing JS Cookies JS HTML DOM DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM Forms DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists JS Async JS Callbacks JS Asynchronous JS Promises JS Async/Await JS Classes Class Intro Class Inheritance Class Static JS Functions Function Definitions Function Parameters Function Invocation Function Call Function Apply Function Bind Function Closures JS Objects Object Definitions Object Properties Object Methods Object Display Object Accessors Object Constructors Object Prototypes Object Iterables Object Sets Object Maps Object Reference Multiple operators can be used successively to create complex queries.JS Tutorial JS HOME JS Introduction JS Where To JS Output JS Statements JS Syntax JS Comments JS Variables JS Let JS Const JS Operators JS Arithmetic JS Assignment JS Data Types JS Functions JS Objects JS Events JS Strings JS String Methods JS String Search JS String Templates JS Numbers JS BigInt JS Number Methods JS Number Properties JS Arrays JS Array Methods JS Array Sort JS Array Iteration JS Array Const JS Dates JS Date Formats JS Date Get Methods JS Date Set Methods JS Math JS Random JS Booleans JS Comparisons JS If Else JS Switch JS Loop For JS Loop For In JS Loop For Of JS Loop While JS Break JS Iterables JS Sets JS Maps JS Typeof JS Type Conversion JS Bitwise JS RegExp JS Precedence JS Errors JS Scope JS Hoisting JS Strict Mode JS this Keyword JS Arrow Function JS Classes JS Modules JS JSON JS Debugging JS Style Guide JS Best Practices JS Mistakes JS Performance JS Reserved Words +, -, /, *, &, |, %, (, ),, =, ! = - These operators behave just as they do in JavaScript. The following queries are - Performs a recursive search for the given property name, returning an array of all values with such a property name in the current object and any subobjects. Note that names are auto-converted to property references of the current object in expressions, but can be used for index access on the current object. $ - This is the root - This is the current object in filter, sort, and map expressions. * or - Returns the values of all the properties of the current object. The union operator returns an array of all the property/index values from the evaluation of the comma delimited expressions. For example to get the first ten items in an array: This performs an array slice/range operation, returning the elements from the optional start index to the optional end index, stepping by the optional step parameters. The following operators from JSONPath are also supported: Results = evaluator(myData, “John”, “Doe”) Or it can be applied to the evaluator function:Įvaluator = (“”) This can be used to reference additional parameters passed to the query call. Rather than only searching an array, this will search property values, arrays, and their children. This will perform a deep search filter operation on all the objects and subobjects of the current data. For example to find all objects in an array with the word “the” in the description regardless of case: For example to find all objects in an array where the name starts with “Mr”, one could use the query:Įxpr ~ expr - Performs a string comparison with case insensitivity. When comparing to a string, the comparison string may contain wildcards * (matches any number of characters) and ? (matches any single character). You can also use object literals and and create a new array of objects that with a name and price properties generated from the source array:Įxpr = expr - Performs a comparison (like JavaScript’s =). For example, to create a list of the price value from an array of objects, we could use the query: This performs a map operation on an array, creating a new array with each item being the evaluation of the expression for each item in the source array. For example to sort an array by lastName first and then firstName as the second priority: indicates ascending order and indicates descending order. Multiple comma delimited sort expressions can be provided for multiple sort orders (first being highest priority). ,, - This performs a sort operation on an array, with sort based on the provide expression. The following JSONQuery will find all the array items that have a price less than 15: This operator does not need to be in brackets, you can simply use ?expression, but since it does not have any containment, no operators can be used afterward when used without brackets. This will perform a filter operation on an array, returning all the items in an array that match the provided expression.
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