javascript字符串格式化

字符串格式化

String.prototype.format = function(args) {
    var result = this;
    if (arguments.length < 1) {
        return result;
    }
    var data = arguments;        
    if (arguments.length == 1 && typeof (args) == "object") {
        data = args;
    }
    for (var key in data) {
        var value = data[key];
        if (undefined != value) {
            result = result.replace("{" + key + "}", value);
        }
    }
    return result;
}

使用

var someString = 'a : {a}, b : {b}';
var trueStr = someString.format({'a' : '123', 'b' : '456'});
trueStr的值爲 'a : 123, b : 456';