使用regex + gsub从字符串中删除方括号内的文本

Question

text = "This [is] a [fill]-in-the-[blank]"

I'm looking for the regular expression to do some magic for me:

new_text = text.gsub(/[magic happens]/, "")

=> "This [] a []-in-the-[]"

My code is Ruby, but I'll bet that doesn't matter much.

Answer 1

Something like this would work:

text = "This [is] a [fill]-in-the-[blank]"
text.gsub(/\[.+?\]/, '[]')
#=> "This [] a []-in-the-[]"

Answer 2

text = "This [is] a [fill]-in-the-[blank]"

text.gsub(/(?<=\[).+?(?=\])/, "")

or

text.gsub(/(?<=\[)[^\]]+?(?=\])/, "")

Answer 3

I used Rubular to prototype this, given your test case -> http://rubular.com/r/TgdjOtc4Ru From here, you can remove the matches or something similar:

[5] pry(main)> text = "This [is] a [fill]-in-the[blank]"
=> "This [is] a [fill]-in-the[blank]"
[6] pry(main)> text.gsub(/\[(\w+)\]/) { |match| "[]" }
=> "This [] a []-in-the[]"

There is probably a prettier way to do that :-)