R是否具有像python一样的开头或结尾函数?

分类: 技术问答 • 2022-03-06 14:12:02

问题描述：

> startsWith('abc', 'a')
[1] TRUE
> startsWith('abc', 'c')
[1] FALSE

> endsWith('abc', 'a')
[1] FALSE  
> endsWith('abc', 'c')
[1] TRUE

答

为

As added to base in 3.3.0, startsWith (and endsWith) are exactly this.

> startsWith("what", "wha")
[1] TRUE
> startsWith("what", "ha")
[1] FALSE