Question

我有动态变量，如：

var4 = 56
var7 = 23
var32 = 53
...
var645 = 21

如何在JavaScript中循环使用这些内容，以便将这些值推送到数组vars中？

Answer 1

检查此pen

var var4 = 56;
var var7 = 23;
var var32 = 53;
//...
var var645 = 21;

var arr = [];
var currentScope = window;
//currentScope = parent.frames[2].window.location;
for( var key in currentScope )
{
  console.log(key);
 if (key.indexOf( "var" ) == 0 )
 {
   console.log( "RELEVANT " + key );
   var suffix = parseInt( key.split( "var" ).join( "" ) );
   if ( !isNaN( suffix ) )
   {
    arr.push( suffix );
   }
 }
}
console.log( arr );

Answer 2

你可以这样做，但你必须知道第一个和最后一个＆＃34;索引＆＃34;以变量的名义＆＃34; var＆＃34;

var var0 = 0;
var var1 = 10;
var var2 = 20;
// var var3 = 30; // <--- this not exist !
var var4 = 40;


var vars = new Array();

for (var i=0; i<5; i++) {
    try {
    vars.push(eval("var" + i));
  } catch(ex) { }
}

This is the JSFiddle

在JavaScript

2 个答案: