JS如何定义用字符串拼接的变量

  function create_variable(num){
    var name = "test_"+num;  //生成函数名
    window[name] = 100;
    window['name'] = 200;  //注意看中括号里的内容加引号和不加引号的区别
  }
  create_variable(2);
  alert(test_2); // 100;
  alert(name); //200;

  var name = "test"
  window.name = 200
  alert(name); // 200
  alert(test);  ReferenceError: test is not defined

var test = {};
  for(var i = 0; i < 3; i++){
    test['test_'+i]='我是字符串'+i;
 
    console.log(test['test_'+i]); //输出:我是字符串0, 我是字符串1, 我是字符串2
  }
console.log(test_0); //输出:ReferenceError: test_0 is not defined
console.log(test['test_0']); //输出:我是字符串0

var test = [];
  for(var i = 0; i < 3; i++){
    test[i]='我是字符串'+i;
    console.log(test[i]); //输出:我是字符串0, 我是字符串1, 我是字符串2
  }
console.log(test[0]); //输出:我是字符串0