為什么沒反應(yīng)
var i;
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(i=0;i<10;i++){
? ? ?if(infos[i][3]=="大一"&&infos[i][2]=="女")
? ? ?document.write(infos[i][1]);
?}
?
?
?
?
??
2019-10-05
對比一下，上面提到的都改了，還是沒反應(yīng)?
2019-09-28
?//第一步把之前的數(shù)據(jù)寫成一個數(shù)組的形式,定義變量為 infos
var arr=[
?['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']
?]
?
?//第一次篩選，找出都是大一的信息
? var a=0;
? for(a=0;a<10;a++)
?{
? if(arr[a][3]=="大一"){
? ? document.write(infos[a]+"<br>");
? }
?}
??
??
?//第二次篩選，找出都是女生的信息
? for(a=0;a<10;a++){
? if(arr[a][1]=="女"){
? ? document.write(infos[a][0]+"<br>");
? }
?}
?
??
2019-09-25
2019-09-25
記得是從0開始算。