javascript string对象格式化,下面是参考代码：
/**
* 字符串格式化，类似于java中的MessageFormat.format() 函数
* e.g.
* 'This is a {0} not a {1}.'.format('string', 'num') => This is a string not a num.
* 'This is a {0}, not a {1}. so parse to {2} first.'.format('string', 'num', 'num') => This is a string not a num. so parse to num first.
* 'This is a {0}, not a {1}. so parse to {1} first.'.format('string', 'num') => This is a string not a num. so parse to num first.
* 'This is a {0}, not a {1}. so parse to {2} first.'.format('string', 'num') => This is a string not a num. so parse to {2} first.
*/
String.prototype.format = function() {
var args = arguments;
return this.replace(/\{(\d+)\}/g, function(){
var val = args[arguments[1]];
alert(val + ' ' + arguments[0]);
return (! val) ? arguments[0] : val;
});
};
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