Json array formatter online

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Json array formatter online

JSON (JavaScript Object Notation) is one of the most popular and widely accepted data exchange formats originally specified by Douglas Crockford. It is currently described by two competing standards, RFC 71592 and ECMA-404. Ecma is minimal, describing only the allowed grammar syntax, while RFC also contains some semantic and security considerations. JSON is commonly accepted in software that includes a client-server architecture for exchanging data between a client and a server. JSON is an easy-to-use and purely textual, lightweight and human-readable format, and people often don't understand xml as a replacement. Although the abbreviation begins with JavaScript, JSON is not a language or has no language literals it's just a specification for data notation. It is a platform and independent and built-in language supported by almost all frontline/structure languages, such as and support for JSON data format is available in all popular languages, some of which are C#, PHP, Java, C++, Python, Ruby and many others. The official type of online media for JSON is the app/json. The JSON file name extension is .json Because JSON does not have any updates, there is only 1 version of JSON, the following link redirects to the original RFC document, which is RFC 4627. Release Date Version The original syntax 2006-07-28 JSON (JavaScript Object Notation) is based on a subset of JavaScript (see also ). A valid JSON expression can be one of the following simple data types of data types: String, Number, Boolean, Null complex data types: Value, Object, Array string JSON must be enclosed in double quotation marks and can contain zero or more Unicode characters; deviations of the backslash are allowed. Accepted JSON numbers are found in e notation. Null is a reserved null keyword. Data type Examples of valid JSON ### String apple \u00c4pfel ### Number 31.4-1.5e3 ### Boolean truefalse ### Null null JSON value can be one of: String, Number, Boolean, Null, Object, Array. A JSON object is a comma-separated unenudited collection of names:pairs of values enclosed in braces, where the name is String and the value is JSON. { id: 1, name: Wooden door, price: 12.50, tags: [home, wooden] } A JSON array is an ordered collection of JSON values. [house, wooden] [ 1, 2, [3, 4, 5, 6], { id: 1, name: Wooden door, price: 12.50, tags: [house, wooden] } ] The JSON object is surrounded by curly braces and contains key-value pairs. { key1: value1, key2: value2, ... } The keys must be valid strings, so they are surrounded by double quotation marks. Values can be JSON objects, numbers, strings, arrays, or one of the following literal names: false, null, or true. In a key-value pair, the key key is separated from the value by a colon. key-value pairs are separated by commas. The order in the objects is not important. The following JSON object is therefore equivalent to the above: { key2: value2, key1: value1, ... } } in conclusion, this is an example of a valid JSON object: { image: { width: 800, height: 600, title: View from 15 floors, thumbnail: { url: height: 125, width: 100 }, visible: true, ids: [116, 943, 234, 38793] } } A JSON Array is an ordered set of values. It is surrounded by square curly braces, and the values are delimited by commas: { colors : [ red, green, blue ] } JSON arrays can also contain any valid JSON element, including objects, as in this example of an array with 2 objects (taken from an RFC document): [ { precision: zip, Latitude: 37.7668, Longitude: -122.3959, Address: City: SAN FRANCISCO, State: CA, Zip: 94107, Country: US }, { precision: zip, Latitude: 37.371991, Longitude: -122.026020, Address: City: SUNNYVALE, State: CA, Zip: 94085, Country: US } ] They can also contain elements of mixed types, for example: [ red, 51, true, null, { state: complete } ] A common mistake when writing arrays (and JSON objects) is to leave the end comma after the last element. This is a common pattern in many languages, but unfortunately it is not valid in JSON. For example, the following array is invalid: [ 1, 2, ] To make this correct, you must remove the comma after the last element by converting it to: [ 1, 2 ] JSON is a very strict format (see ). This makes it easy to analyze and write for machines, but surprises people when inconspicuous errors break a document. Such as: Unlike most programming languages, you cannot add an end comma: { a: 1, b: 2, c: 3 } Adding a comma after 3 will result in a synax error. The same problem occurs with arrays: [ 1, 2 ] Take special care if you need to re-print the elements. { a: 1, b: 2, c: 3 d: 4 } Since trailing commas are not allowed, it is easy to forget to add one before adding a new value (in this case, 3 each). JSON does not allow comments because it is a data exchange format. This is still a hot topic, though without clear answers other than not using them. There are several workarounds: Use C-style comments, and then remove them before uploading them to the Embed Comments to Data Analyzer { //: comment, date: 1 } Embed comments and overwry them with { date: comment, date: 1 } The second data entry will replace the comment in most analyzers. To make writing JSON easier, use an IDE that checks for syntax errors and provides syntax coloring. Plugins are available to most editors. When developing applications and tools, use JSON internally and as a protocol, but try not to share it in places where a person will probably be required to edit manually (except debugging). Evaluate other formats that are better suited to this application, such as: Hjson, can be smoothly converted to and from JSON TOML, similar to YAML INI files, more features, but at the expense of additional complexity arrays represent a collection collection At JS, there are several collection features off of them, such as slice, pop, push. Objects have only more raw data. JSONArray is an ordered sequence of values. Its outer text form is a string wrapped in square brackets with commas separating the values. JSONObject is an unsealed collection of name/value pairs. Its outer form is a string wrapped in braces with colons between names and values, and commas between values and names. Object - key and value, array - numbers, strings, logical values. When do you use this or that? Arrays can be thought of as is/an and objects as ma. Let's use Fruit as an example. Each element in the fruit board is a kind of fruit. array fruits : [orange, mango, banana] Arrays can contain objects, strings, numbers, arrays, but only deal with objects and arrays. array: [orange:[], mango:{}, banana:{}] You can see that orange is also an array. That is, any element that goes int orange is a kind of orange, say: bitter_orange, tangerine, sweet_orange. in the case of a fruit object, each item in it is an attribute of the fruit. thus, the fruit of the object :{seed:{}, endocarp:{},flesh:{}} It also means that everything in the seed object should be owned by seeds, say: color, .. JSON is primarily a language that allows you to serialize javascript objects into strings. So after deserializing the JSON string you should get the javascript object structure. If json deserializes to an object that stores 100 objects named object1 to object100 then it will be very inconvenient. Most deserializers will expect known objects and arrays of known objects so that they can convert strings to the actual structure of the object in the language you are using. It is also a question that the philosophy of object-oriented design will answer. In JavaScript, the JSON object is used to parse the JSON string. This method is only available in modern browsers (IE8+, Firefox 3.5+, etc.). When a valid JSON string is analyzed, the result is a JavaScript object, array, or other value. JSON.parse('bar of foo') // bar of foo (type number) JSON.parse(true) // true (boolean type) JSON.parse(1) // 1 (type number) JSON.parse([1,2,3]) // [1, 2, 3] (type array) JSON.parse('{foo:bar}') // {foo: bar} (object type) JSON.parse(null) // null (object type) Invalid string s will throw a JavaScript error JSON.parse({foo:bar}') // Uncaught SyntaxError: Unexpected token f in JSON at 1 JSON.parse([1 2,3,]) // Uncured SyntaxError: Unexpected Token ] in JSON at item 7 JSON.parse(undefined) // Unseemlyd syntaxEror: The unexpected token u in JSON at 0 Method JSON.parse includes an optional reviver function that can limit or modify the parm analysis (object) detail object of the JSON Replacer object(| Array - optiotinal) filter function | Space | string - optional) Amount of space in JSON Convert simple JSON object to simple string var JSONObject = { stringProp: stringProp: booleanProp: false, intProp: 8 } var JSONString = JSON.stringify(JSONObject); console.log(JSONString); output * {stringProp:stringProp,booleanProp:false,intProp:8} */ Stringify with var filter JSONObject = { stringProp: 'stringProp', booleanProp: false, intProp: 8 } var JSONString = JSON.stringify(JSONObject, ['intProp']); console.log(JSONString); /* output * {intProp:8} */ Stringify with white characters var JSONObject = { stringProp: 'stringProp', booleanProp: false, intProp: 8 } var JSONString = JSON.stringify(JSONObject, null, 2); console.log(JSONString); /* output: * * * stringProp: stringProp, * booleanProp: false, * intProp: 8 * } */ */

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