如,深拷贝的例子function deepCopy(p, c) { var c = c || {}; for (var i in p) { if (typeof p[i] === 'object') { c[i] = (p[i].constructor === Array) ? [] : {}; deepCopy(p[i], c[i]); } else { c[i] = p[i]; }
} return c;
}
} return c;
}
== 等于true == 1
但是
true !== 1===会连带着类型一起判断
=== 不会转换数据类型直接比较内存中的引用地址。var a = '5';
var b = 5;
alert( a == b); //true
alert( a === b); //false