不理解,求解答
二維數(shù)組 不是只能定義2個(gè)變量，為什么可以定義4個(gè)
慕函數(shù)2545374
2016-09-22
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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>")
}
}
})
一維數(shù)組 var arr=[1,2,3,4];
二維數(shù)組 var arr2=[[1,2,3,4],[5,6,7,8,9,10]] ,二維只是代表一個(gè)xy矩陣
2016-09-22
你吧那4個(gè)看成一個(gè)整體.就好比一個(gè)盒子里面裝的有4個(gè)東西.