如何在系統（）中替換寶石內紅寶石gem

Question

我想使用系統（）裏面的紅寶石。系統內部的字符串（）內容禁忌。所以我嘗試：

filenamenew = filename.gsub(/ /, '_').gsub(/(/, '|').gsub(/)/, ']') 

可悲的是我得到：

/home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems /core_ext/kernel_require.rb:54:in require': /home/sascha/ownCloud/RubymineProjects/youtube_dlhelper/lib/youtube_dlhelper/ripper.rb:57: end pattern with unmatched parenthesis: /(/ (SyntaxError) unmatched close parenthesis: /)/ from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in需要 '從./youtube_dlhelper.rb:24:in`'

能解決這個問題？

Answer 1

另一個可讀的變化可能是

str = "Rednex - Cotton Eye Joe (Official Music Video) [HD] - RednexMusic com.m4a" 

pattern = /[a-zA-Z0-9\-\s\_]/ #=> set the pattern accepted 

#=> check each character keep only if they are in the pattern and join them 
str.split(//).keep_if{|chr| chr =~ pattern}.join #=> "Rednex - Cotton Eye Joe Official Music Video HD - RednexMusic comm4a" 

Answer 2

，因爲你需要躲避括號中的正則表達式您收到此錯誤，即

"Hello()".gsub(/\(/, ' World')

將返回的「Hello World）」

Answer 3

下面是一些正則表達式來擺脫括號，括號和空格：

/(\(|\)|\s|\[|\])/ 

"Rednex - Cotton Eye Joe (Official Music Video) [HD] - RednexMusic com.m4a".gsub(/(\(|\)|\s|\[|\])/, "") 

輸出：

"Rednex-CottonEyeJoeOfficialMusicVideoHD-RednexMusiccom.m4a"