<!DOCTYPE HTML> <html > <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <script type="text/javascript"> var infos = [ ['小A','女',21,'大一'], ['小B','男',23,'大三'], ['小C','男',24,'大四'], ['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][0] + "<br/>") 这里 i<infos.length 怎么解释了
数据分析师2017-09-30 23:23:41
Great God’s advice-PHP Chinese website Q&A-Great god’s advice-PHP Chinese website Q&A
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巴扎黑2016-12-21 11:26:27
infos.length是infos数组的数组长度,for(var i=0;i<infos.length;i++)是指只要iinfos数组的长度就继续循环直到
i<infos.length不成立为止就退出for循环了