用R中的單個反斜杠替換斜杠

Question

這可能是微不足道的，但是我沒有找到任何涉及此確切問題的問題。 我的問題與提出合適的正則表達式無關，而與准確指定替換零件有關。

x = "file_path/file_name.txt" - this is what I have
# "file_path\file_name.txt" - this is what I want

這是我嘗試過的：

library(stringr)
str_detect(string = x, pattern = "/") # returns TRUE, as expected
#str_replace_all(string = x, pattern = "/", replacement = "\") # fails, R believes I'm escaping the quote in the replacement
str_replace_all(string = x, pattern = "/", replacement = "\\") # this results to "file_pathfile_name.txt", missing the backslash altogether
str_replace_all(string = x, pattern = "/", replacement = "\\\\") # this results to "file_path\\file_name.txt", which is not what I want

任何幫助將不勝感激。

Answer 1

解決方案是轉義轉義字符，該字符末尾表示4'\\'。

cat(gsub('/', '\\\\', "file_path/file_name.txt"))

查看標准輸出與“ print（）”（轉義轉義字符）之間的區別，或者使用“ cat（）”獲取純字符串。

str_replace_all(string = x, pattern = "/", replacement = "\\\\")
cat(str_replace_all(string = x, pattern = "/", replacement = "\\\\"))