Javascript:移动数组中的元素

Question

var array = ["object1","object2","object3","object4","object5"];
var copy = array.slice();
copy.forEach(function(value) {
 if(value === "object3"){
  value = "newObject3"

 }
});

console.log(copy );

如果我想在为数组中的object3 分配新值后将其移动到第一个索引。我该怎么做？什么是最有效且时间最少的？可以使用像 lodash 这样的任何库。

Answer 1

var array = ["object1", "object2", "object3", "object4", "object5"];
var copy = array.slice();
copy.forEach(function(value, index, theArray) {
  if (value === "object3") {
    theArray[index] = theArray[0];
    theArray[0] = "newObject3";
  }
});

console.log(copy);