Question

为了澄清我的头衔,我需要一种方法,确定物体不是“Sting”、“号码”、“Boolean”或“预先界定的Java”字标。一种思维方式是:

if(!typeof myCustomObj == "string" && !typeof myCustomObj  == "number" && !typeof myCustomObj == "boolean") {

我可以检查一下,myCustomObj是否为物体,如:

if(typeof myCustomObj == "object") {

这只是用于原始价值,但正如这一“新强权”(“hello World”)=“object”/代码”一样。

确定某一物体是否为而不是预先界定的Java 标语,是哪些可靠途径?

Answer 1

http://api.jquery.com/jery.isPlainObject/“rel=“nofollow”

function (obj) {
    // Must be an Object.
    // Because of IE, we also have to check the presence of the constructor property.
    // Make sure that DOM nodes and window objects don t pass through, as well
    if (!obj || jQuery.type(obj) !== "object" || obj.nodeType || jQuery.isWindow(obj)) {
        return false;
    }

    try {
        // Not own constructor property must be Object
        if (obj.constructor && !hasOwn.call(obj, "constructor") && !hasOwn.call(obj.constructor.prototype, "isPrototypeOf")) {
            return false;
        }
    } catch(e) {
        // IE8,9 Will throw exceptions on certain host objects #9897
        return false;
    }

    // Own properties are enumerated firstly, so to speed up,
    // if last one is own, then all properties are own.
    var key;
    for (key in obj) {}

    return key === undefined || hasOwn.call(obj, key);
}

Answer 2

You can use the "toString" functon on the Object prototype:

var typ = Object.prototype.toString.call( someTestObject );

给出的答案是“[目标][目标日期]”或“[目标日期]”。不幸的是,你可以把这种方式区分成单纯的物体和与建筑商做的事物,但从某种意义上来说,这些事情实际上没有什么不同。

友情链接