LeetCode --- --- left rotation string string series

Left rotation string

topic

Left rotational operation in front of the string is the string of several characters to the end of the string transfer.

Define a function to achieve a left rotation operation function string.

For example, the input string "abcdefg" and the number 2, this function returns two results obtained left rotation "cdefgab".

Examples

示例 1：

输入: s = "abcdefg", k = 2
输出: "cdefgab"

示例 2：

输入: s = "lrloseumgh", k = 6
输出: "umghlrlose"

Source: stay button (LeetCode)

link: https://leetcode-cn.com/problems/zuo-xuan-zhuan-zi-fu-chuan-lcof/

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Problem-solving ideas

1、
在给定的 `字符串 chars` 中， 
截取从 0 到 k (不包含 k) 的一段 `字符串 B` 出来

2、截取从 k(包含 k) 开始到最后的一段 `字符串 A`

3、将 `字符串 A` 与 `字符串 B` 拼接，得到结果

answer

let reverseLeftWords = function(s, k) {
    return s.slice(k) + s.slice(0, k)
}

Attach string interception method Essays

String of slice, substring, substr to use