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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,'大四'],? ['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'
]
for (var i = 0; i < infos.length; i++) {
?if (infos[i][3]=='大一'&&infos[i][1]=="女") {
??document.write(infos[i]+'<br>');
?}
?}

Mr_left_1413

2018-10-26

源自：JavaScript進(jìn)階篇 4-10

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2 回答

冷眸深似海
2018-10-26

這什么啊都? 服? ?還刪不掉

0 回復(fù) 有任何疑惑可以回復(fù)我~

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冷眸深似海
2018-10-26

<script?type="text/javascript">?//第一步把之前的數(shù)據(jù)寫(xiě)成一個(gè)數(shù)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,'大四'],????????['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']????]//遍歷infos?并將其中大一?女篩選出來(lái)并輸出????for(var?i=0;i<=infos.length;i++){????????if(infos[i][3]=='大一'?&&?infos[i][1]=="女"){????????????document.write(infos[i]+'</br>')????????}????}</script>