在第一个单词后将一个字符串拆分为两部分？

Question

例如，我有一个字符串

x <- 'what are you talking about'

如何将其拆分为两个字符串'what'和'are you talking about'？

Answer 1

匹配而不是拆分。

> x <- 'what are you talking about'
> library(stringi)
> stri_extract_all(x, regex="^\\S+|\\S.*")[[1]]
[1] "what"                          
[2] "are you talking about"

或

> library(stringr)
> str_split(x, perl("^\\S+\\K\\s+"))
[[1]]
[1] "what"                          
[2] "are you talking about"

Answer 2

你可以做到这一点，因为strsplit在这里不会很好看：

val <- regexpr("\\s",x)
substring(x, c(1,val+1), c(val-1,nchar(x)) )
#[1] "what"                           "are you talking about"