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bind
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    bind

    : 5

    this 

    function f() {
  alert(this.name);
}

f = f.bind( {name: "John"} ).bind( {name: "Ann" } );

f();

    John

    function f() {
  alert(this.name);
}

f = f.bind( {name: "John"} ).bind( {name: "Pete"} );

f(); // John

    f.bind(...) exotic

    re-bound

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