r - 用R中的单个反斜杠替换斜杠

Question

这可能是微不足道的，但我没有找到任何关于这个确切问题的问题。我的问题与提出合适的正则表达式无关，它与准确指定替换部件有关。

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

这是我尝试过的：

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

任何帮助将不胜感激。

Answer 1

解决方案是转义转义字符，这意味着最后是 4 '\'。

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

查看标准输出与转义字符的“print()”或使用“cat()”获取纯字符串之间的区别。

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