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                        /JavaScript進階篇

為什么只輸出小A

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?//第一步把之前的數據寫成一個數組的形式,定義變量為 infos
?var infos=[['小A','女','21','大一'],['小B','男','23','大三'],['小C','男','24','大四'],['小D','女','21','大一'],
?????????? ['小E','女','22','大二'],['小F','男','21','大一'],['小G','女','22','大二'],['小H','女','20','大三'],
?????????? ['小I','女','20','大一'],['小J','男','20','大三']];
?var one=new Array();
?//var n=0;//注釋掉只輸出小A
?//第一次篩選，找出都是大一的信息
?for(var i=0;i<infos.length;i++){
???? if(infos[i][3]=='大一'){
???? one[i]=infos[i];
???? document.write(one[i]+"<br/>");
???? //one[n]=infos[i];//注釋掉只輸出小A
???? //n++;//注釋掉只輸出小A
???? }
?}
?//第二次篩選，找出都是女生的信息
?for(var j=0;j<one.length;j++){
???? if(one[j][1]=='女'){
???????? document.write("第二次篩選后："+one[j][0]+"<br/>");
???? }
?}

?
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