regex - 在 R 中将字符转换为 lowerCamelCase

Question

我有如下所示的字符向量:

x <- c("cult", "brother sister relationship", "word title")

我想将其转换为如下所示的 lowerCamelCase 样式:

c("cult", "brotherSisterRelationship", "wordTitle")

我玩过 gsub、gregexpr、strplit、regmatches 和许多其他函数，但不能'抓不住。

尤其是一个字符中的两个空格似乎很难处理。

也许这里有人知道如何做到这一点。

Answer 1

> x <- c("cult", "brother sister relationship", "word title")
> gsub(" ([^ ])", "\\U\\1", x, perl=TRUE)
[1] "cult"                      "brotherSisterRelationship"
[3] "wordTitle"

引自pattern matching and replacement :

For perl = TRUE only, it can also contain "\U" or "\L" to convert the rest of the replacement to upper or lower case and "\E" to end case conversion.