How to use slice() in js

This article mainly shares with you how to use slice() in js. slice() obtains a new array through the index position. This method does not modify the original array, but only returns a new subarray.

Usage: arrayObj.slice(start,end)

• arrayObj - original array;

• start - required; sets the starting position of the new array; if it is a negative number, it means counting from the end of the array (-1
  refers to the last element, -2 refers to the second to last element, and so on).

• end - Optional; set the end position of the new array; if this parameter is not filled in, it will default to the end of the array; if it is a negative number, it means counting from the end of the array (- 1 refers to the last element, -2
  refers to the second to last element, and so on).

例1：获取仅包含最后一个元素的子数组var arr=[1,2,3,4,5];
arr.slice(-1);//[5]例2：获取不包含最后一个元素的子数组var arr=[1,2,3,4,5];
arr.slice(0, -1);//[1,2,3,4]例3：获取包含 从第二个元素开始的所有元素的子数组var arr=[1,2,3,4,5];
arr.slice(1);//[2,3,4,5]

slice() obtains a new array through the index position. This method does not modify the original array, but only returns a new subarray.

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