r - str_replace 不会替换所有出现的内容，但是 gsub 会替换吗？

Question

我正在尝试从如下所示的字符串中删除括号。

library(stringr)

x <- "(Verhoeff,1937)"

str_replace(string = x, pattern = "(\\()|(\\))", replacement = "")
[1] "Verhoeff,1937)"

gsub(pattern = "(\\()|(\\))", replacement = "", x = x)
[1] "Verhoeff,1937"

str_replace似乎没有找到右括号？
任何想法为什么？

Answer 1

它只匹配第一次出现，而 gsub做这一切。使用 str_replace_all反而:

str_replace(string = "aa", pattern = "a", replacement = "b") # only first

str_replace_all(string = "aa", pattern = "a", replacement = "b") # all