【Javascript】JS常用方法扩展

String.prototype.format = function(args) { 
if (arguments.length>0) { 
var result = this; 
if (arguments.length == 1 && typeof (args) == "object") { 
for (var key in args) { 
var reg=new RegExp ("({"+key+"})","g"); 
result = result.replace(reg, args[key]); 
} 
} 
else { 
for (var i = 0; i < arguments.length; i++) { 
if(arguments[i]==undefined) 
{ 
return ""; 
} 
else 
{ 
var reg=new RegExp ("({["+i+"]})","g"); 
result = result.replace(reg, arguments[i]); 
} 
} 
} 
return result; 
} 
else { 
return this; 
} 
} 

$.format = function (source, params) {
    if (arguments.length == 1)
        return function () {
            var args = $.makeArray(arguments);
            args.unshift(source);
            return $.format.apply(this, args);
        };
    if (arguments.length > 2 && params.constructor != Array) {
        params = $.makeArray(arguments).slice(1);
    }
    if (params.constructor != Array) {
        params = [params];
    }
    $.each(params, function (i, n) {
        source = source.replace(new RegExp("\\{" + i + "\\}", "g"), n);
    });
    return source;
}; 

Array.prototype.del = function (index) {
    if (isNaN(index) || index >= this.length) {
        return false;
    }
    for (var i = 0, n = 0; i < this.length; i++) {
        if (this[i] != this[index]) {
            this[n++] = this[i];
        }
    }
    this.length -= 1;

};

/**
* 从对象数组中删除属性为objPropery，值为objValue元素的对象
* @param Array arrPerson  数组对象
* @param String objPropery  对象的属性
* @param String objPropery  对象的值
* @return Array 过滤后数组
*/
function Remove(arrayObj, objPropery, objValue) {
    return $.grep(arrayObj, function (cur, i) {
        return cur[objPropery] != objValue;
    });

}