关于new的javascript内存问题

Question

这是我的代码

    function function_to_call(text){
    var variable_need = new Array (
        0x3131, 0x3132, 0x3134, 0x3137, 0x3138, 0x3139,
        0x3141, 0x3142, 0x3143, 0x3145, 0x3146, 0x3147,
        0x3148, 0x3149, 0x314a, 0x314b, 0x314c, 0x314d, 0x314e
    );

    ......

    return v;
}
    function_to_call(a)
    function_to_call(b)
    function_to_call(c)

每次调用function_to_call时都会生成variable_need吗？

如果function_to_call频繁调用...

是否需要制作原型(prototype)来防止内存泄漏？

Answer 1

其他人已经回答了您的问题，但您也可以在闭包中保留对该变量的引用，这样它就不会每次都创建，也不是全局变量，但可用于 function_to_call 功能:

var function_to_call = (function() {
  var variable_need = [
      0x3131, 0x3132, 0x3134, 0x3137, 0x3138, 0x3139,
      0x3141, 0x3142, 0x3143, 0x3145, 0x3146, 0x3147,
      0x3148, 0x3149, 0x314a, 0x314b, 0x314c, 0x314d, 0x314e
  ];
  return function (text) {

    // variable_need available here

    return v;
  };
}());

function_to_call(a)
function_to_call(b)
function_to_call(c)