ruby - Regex / Remove slash from string in ruby

Question

Thanks in advance...

I am having some trouble with regular expressions in ruby, or otherwise finding a way to remove a slash from a string. Here is how my string looks:

string = "word \/ word"

I am trying to remove both the backslash and the slash; I want this result:

string = "word  word"

I think I am missing something with escape characters, or who knows what!

I have tried this:

string.gsub(/\//, "")

which will remove the backslash, but leaves the slash. I have tried variations with escape characters all over and in places that don't even make sense!

I am terrible with regex and get very frustrated working with strings in general, and I am just at a loss. I'm sure it's something obvious, but what am I missing?

Answer 1

原因是因为两者/都不\是正则表达式中的有效字符。所以他们必须通过\在他们面前放一个来逃脱。如此\成为\\和/成为\/。将它们放在另一组斜杠中以构成 Regexp 文字，我们得到：

string.gsub(/\\\//, "")

另一种写法是：

string.gsub(/#{Regexp.escape('\/')}/, "")

您应该查看 rubular 以了解开发 Regexp 字符串的好方法。

http://rubular.com/r/ml1a9Egv4B

Answer 2

str = "word \/ word"
p str.delete('\/') #=>"word  word"
# to get rid of the double spaces:
p str.delete('\/').squeeze(' ') #=>"word word"

Answer 3

它实际上做了你想要的，但不是因为你认为的原因：

string = "word \/ word"
# => "word / word"
string.gsub(/\//, "")
# => "word  word"

注意：你需要 gsub！如果要替换字符串的内容