JS写法的format方法
2009-09-04 16:41 hailibu 阅读(459) 评论(1) 编辑 收藏 举报 1
<script type="text/javascript">
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String.format = function(str,arr)
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{
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if (arr.constructor == Array) {
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for (var i = 0; i < arr.length; i++) {
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var re = new RegExp('\\{' + (i) + '\\}', 'gm');
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str = str.replace(re, arr[i]);
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}
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}else{
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for(elem in arr) {
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var re = new RegExp('\\{' + elem + '\\}', 'gm');
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str = str.replace(re, arr[elem]);
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}
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}
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return str;
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}
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String.prototype.format=function()
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{
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var str=this;
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for(var i=0;i<arguments.length;i++){
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str=str.replace(eval("/\\{"+i+"\\}/g"),arguments[i]);
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}
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return str;
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}
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var output1 = String.format("My name is {0},{1}",["derry","xie"]);
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document.writeln(output1);
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var output2 = String.format("My name is {id},{name}",{id:28,name:"derry"});
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document.writeln(output2);
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var output3 = "My name is {0},{1}";
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document.writeln(output3.format("derry","xie"));
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</script>
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