Javascript更改数组元素的位置

Question

我在 javascript 中有这样的嵌套数组:

testArray['element1'] = {par1: "value1", par2: "value2" ... }
testArray['element2'] = {par1: "value1", par2: "value2" ... }
testArray['element3'] = {par1: "value1", par2: "value2" ... }
testArray['element4'] = {par1: "value1", par2: "value2" ... }

那么我怎样才能改变元素的位置呢？例如代替

("element1", "element2", "element3","element4")
to be
("element4", "element2", "element3","element1")
or
("element1", "element4", "element3","element2")

Answer 1

首先，正确构建对象:

array = {
  'element1' : {par1: 'value1', par2: 'value2', par3: 'value3'....},
  'element2' : {par1: 'value1', par2: 'value2', par3: 'value3'....},
  'element3' : {par1: 'value1', par2: 'value2', par3: 'value3'....},
  'element4' : {par1: 'value1', par2: 'value2', par3: 'value3'....}
}

然后交换:

var tmp = array['element2'];
array['element2'] = array['element1'];
array['element1'] = tmp;