str_replace不替换所有出现，但gsub呢？

Question

我正在尝试删除字符串中的括号，如下所示。

library(stringr)

x <- "(Verhoeff,1937)"

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

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

str_replace似乎没有找到结束括号？ 有什么想法吗？

Answer 1

它只匹配第一个出现，而gsub完成所有。请改用str_replace_all：

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

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