Best way to deallocate an array of array in javascript

Question

What is the best way to deallocate an array of array in javascript to make sure no memory leaks will happen?

var foo = new Array();
foo[0] = new Array();
foo[0][0] = 'bar0';
foo[0][1] = 'bar1';
foo[1] = new Array();
...

1. delete(foo)?
2. iterate through foo, delete(foo[index]) and delete(foo)?
3. 1 and 2 give me the same result?
4. none?

Answer 1

foo = null;

应该足以让垃圾收集器摆脱数组,包括它的所有子数组(假设没有别的引用它们).请注意,它只会在它想要时,而不是立即消除它,所以如果浏览器的内存消耗不会立即消失,不要感到惊讶:这不是泄漏.

如果这些数组元素中的任何一个包含对DOM节点的引用,则可能会变得更复杂.

Answer 2

您无法删除变量，请将其设置为空foo = null;

..或使用命名空间对象

var namespace = {};
namespace.foo = [];
delete namespace.foo;