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二维数组不是只能定义2个变量，为什么可以定义4个

慕函数2545374

2016-09-22

源自：JavaScript进阶篇 4-10

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qaza2008
2016-09-22

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"]];

infos.forEach(function(item){

if(item[3]=="大一"){

if(item[1]=="女"){

document.write(item[0]+"<br>")

}

})

一维数组 var arr=[1,2,3,4];

二维数组 var arr2=[[1,2,3,4],[5,6,7,8,9,10]] ,二维只是代表一个xy矩阵