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underscore.jsの_.bindAll()

Posted at

http://underscorejs.org/#bindAll

thisを束縛するらしい。
何のことかいまいち分からないので、試してみました。
上記のunderscore.jsのサイトでgoogle chromeだと、

var hoge = {
  hello:function(){console.log('hello '+ this.name)}, 
  name: 'daichi'
};

function Fuga(){}

var fuga = new Fuga();

fuga.name = 'ogawa';

fuga.hello = hoge.hello;

fuga.hello();
//=>hello ogawa
//=>this.nameがfugaのogawaになっている。
var hoge = {
  hello:function(){console.log('hello '+ this.name)}, 
  name: 'daichi'
};
_.bindAll(hoge, 'hello');

function Fuga(){}

var fuga = new Fuga();

fuga.name = 'ogawa';

fuga.hello = hoge.hello;

fuga.hello();
//=>hello daichi
//=>this.nameはhogeのdaichiになったまま。

_.bindAll(object, 'メソッド名1', 'メソッド名2', …);

見たいにして複数指定できるようです。

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