#javascript object notation

[guangyaw]

資料交換格式JSON

JSON全名為 Javascript   Object   Notation,

與XML類似,

都是一種資料交換的格式,

JSON文件的副檔名通常為   .json

今天就來了解何謂

  資料交換格式JSON

JSON的內容其實就是文字內容,

JSON物件通常以大括號     {}  包住成對的  key:  value    ,

並且以逗號隔開,

例如:

{ “key1” : “value1”, “key2” : “value2”, “key3” : “value3”, ………………………… }

之前有介紹過   Python的集合物件   ,

從中可發現,

JSON物件與Python中的字典很像,

都是以大括號包住成對的 key 與   value

而JSON陣列則與Python清單相似,

都是以中括號包住物件,並以逗號隔開

  一個JSON陣列可能長這樣:

  { “key1”…

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[syndicode]

All you wanted to know about JSON WEB TOKEN (JWT)

Last year Syndicode shared a simple example of how to use JWT to authenticate your app. This time we eventually ready to continue this topic with a great material consisting all you wanted to know about JSON WEB TOKEN (JWT). JSON Web Token is a standard used to create access tokens for an...

[nraboy]

Parse A JSON File With Java

Parse A JSON File With Java

Recently I was tasked with reading a JavaScript Object Notation (JSON) file using Java.  In my project, the JSON file contained properties information to be used inside the application.

There are many libraries available for reading or parsing JSON data in Java, but in particular we are going to be using the library found on json.org.

(more…)

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[andre3k1]

Leon Bambrick blogs:

JSON is a syntax for passing around objects that contain name/value pairs, arrays and other objects.

Here's a tiny scrap of JSON:

{"skillz": {           "web":[                     {"name": "html",                       "years": "5"                     },                     {"name": "css",                       "years": "3"                     }],           "database":[                     {"name": "sql",                       "years": "7"                     }] }}

Basically:

Squiggly brackets act as 'containers'

Square brackets holds arrays

Names and values are separated by a colon.

Array elements are separated by commas

JSON is like XML because:

They are both 'self-describing' meaning that values are named, and thus 'human readable'

Both are hierarchical. (i.e. You can have values within values.)

Both can be parsed and used by lots of programming languages

Both can be passed around using AJAX (i.e. httpWebRequest)

JSON is unlike XML because:

XML uses angle brackets, with a tag name at the start and end of an element: JSON uses squiggly brackets with the name only at the beginning of the element.

JSON is less verbose so it's definitely quicker for humans to write, and probably quicker for us to read.

JSON can be parsed trivially using the eval() procedure in JavaScript

JSON includes arrays {where each element doesn't have a name of its own}

In XML you can use any name you want for an element, in JSON you can't use reserved words from javascript

The more you know. Thanks Leon Bambrick!