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var myObj = {
value : 0,
increment : function(inc) {
this.value += typeof inc === 'number' ? inc : 1;
}
};
myObj.increment();
console.log(myObj.value); // 1
myObj.increment(2);
console.log(myObj.value); // 3
var add = function(a, b) {
return a + b;
}
myObj.double = function() {
var that = this;
var helper = function() {
that.value = add(that.value, that.value);
};
// 関数呼び出し
helper();
}
// メソッド呼び出し
myObj.double();
console.log(myObj.value); // 6
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