Json generateは 引数に渡したrubyのhashをjson形式の文字列に1行で変換して返します to jsonメソッドと違い jsonモジュールを使用できる様にする為にrequire json を実行する必要があります.
Require json ruby.
It s easy to read and understand both by humans and machines.
We ll use the spotify api because it allows requests without authentication.
On ruby 1 8 7 you ll need to install a gem.
You can choose to load a set of common additions to ruby core s objects if you require json add core to get the best compatibility to rails json implementation you can require json add rails both of the additions attempt to require json like above first if it has not been required yet.
It is based on a subset of the javascript programming language standard ecma 262 3rd edition december 1999.
Generating or serializing json in ruby.
Define a url to be parsed.
It is easy for humans to read and write.
Load a ruby data structure from a json source and return it.
Ruby has a built in module that contains methods to generate and parse json.
However in ruby 1 9 2 the json gem is bundled with the core ruby distribution.
To modify the default options pass in the optional options argument as well.
The ruby toolbox lists no less than 25 http clients.
It is easy for machines to parse and generate.
A source can either be a string like object an io like object or an object responding to the read method.
The four code snippets below will.
State is a json state object.
Require json pure to use the pure variant.
So if you re using 1 9 2 you re probably all set.
In an overview json javascript object notation is a lightweight data interchange format.
Json is a language agnostic lightweight data interchange format.
An object convertible into a hash by a to h method that is used as or to configure a state object.
Given below is a ruby program that will be used to parse the above mentioned json document usr bin ruby require rubygems require json require pp json file read input json obj json parse json pp obj on executing it will produce the following result.
Let s look at how to retrieve and parse json results from a restful api using the four most popular ruby http libraries.
It defaults to a state object that creates the shortest possible json text in one line checks for circular data structures and doesn t.
Make an http get request to that url.
Generate a json document from the ruby data structure obj and return it.
Or a hash like object responding to to hash.
Installing the json gem.
