将多个空格合并为单个空格；删除尾随/前导空格 [英] Merge Multiple spaces to single space; remove trailing/leading spaces

问题描述

我想将多个空格合并为一个空格(空格也可以是制表符)并删除尾随/前导空格.

I want to merge multiple spaces into single space(space could be tab also) and remove trailing/leading spaces.

例如...

string <- "Hi        buddy        what's up    Bro" 

到

"Hi buddy what's up bro"

我检查了 Regex 中给出的解决方案以替换多个空格一个空格.请注意，不要将 \t 或 \n 作为玩具字符串内的确切空间，并将其作为 gsub 中的模式输入.我想要在 R 中.

I checked the solution given at Regex to replace multiple spaces with a single space. Note that don't put \t or \n as exact space inside the toy string and feed that as pattern in gsub. I want that in R.

请注意，我无法在玩具字符串中放置多个空格.谢谢

Note that I am unable to put multiple space in toy string. Thanks

推荐答案

这似乎可以满足您的需求.

This seems to meet your needs.

string <- "  Hi buddy   what's up   Bro "
library(stringr)
str_replace(gsub("\\s+", " ", str_trim(string)), "B", "b")
# [1] "Hi buddy what's up bro"

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