<!DOCTYPE HTML> <html > <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>流程控制语句</title> <script type="text/javascript"> var info=[['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']]; //第一步把之前的数据写成一个数组的形式,定义变量为 infos var fresher = new Array(); var a=0; for(var i=0;i<info.length;i++){ if(info[i][3]=='大一'){ fresher[a]=info[i]; a++; } } //第一次筛选,找出都是大一的信息 var girlsName=new Array(); var b=0; for(var j=0;j<fresher.length;j++){ if(fresher[i][1]=="女"){ girlsName[b]=info[i][0]; b++; } } //第二次筛选,找出都是女生的信息 document.write(info); document.write(info[1][1]); document.write(fresher); document.write(girlsName); </script> </head> <body> </body> </html>
我的代码没错,只是网站偶尔抽风显示不出来东西,我又重新打了一遍就好了
参考一下:
<!DOCTYPE HTML> <html > <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>流程控制语句</title> <script type="text/javascript"> //第一步把之前的数据写成一个数组的形式,定义变量为 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"]]; //第一次筛选,找出都是大一的信息 for(var i=0;i<10;i++) if(infos[i][3]=="大一"&&infos[i][1]=="女") document.write(infos[i]+"<br>"); //第二次筛选,找出都是女生的信息 </script> </head> <body> </body> </html>