如何在Javascript中将项目数组向上移动4个位置

Question

如何在Javascript中将项目数组向上移动4个位置？

我有以下字符串数组:

var array1 = ["t0","t1","t2","t3","t4","t5"];

我需要一个函数转换"array1"导致:

// Note how "t0" moves to the fourth position for example
var array2 = ["t3","t4","t5","t0","t1","t2"];  

提前致谢.

Answer 1

array1 = array1.concat(array1.splice(0,3));

在Firebug中运行以下内容进行验证

var array1 = ["t0","t1","t2","t3","t4","t5"];
console.log(array1);
array1 = array1.concat(array1.splice(0,3));
console.log(array1);

结果是

["t0", "t1", "t2", "t3", "t4", "t5"]
["t3", "t4", "t5", "t0", "t1", "t2"]

Answer 2

您可以对数组进行切片,然后以相反的顺序连接它:

var array2 = array1.slice(3).concat(array1.slice(0, 3));