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var format = function(s, arg0) { 
  var args = arguments; 
				  return s.replace(/\{(\d+)\}/ig, function(a, b) { 
				    return args[(b | 0) + 1] || ‘‘; 
				  }); 
			};
		console.log(format("{0} love {1}.",‘I‘,‘You‘));
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原文地址:http://www.cnblogs.com/liangxuru/p/4736945.html