How to delete specific characters from a string in Ruby

Question

I have several strings that look like this      String1      They are all different lengths  How could I remove the parentheses from all these strings in a loop

User · Answer

Here is an even shorter way of achieving this:

1) using Negative character class pattern matching

irb(main)> "((String1))"[/[^()]+/]
=> "String1"

^ - Matches anything NOT in the character class. Inside the charachter class, we have ( and )

Or with global substitution "AKA: gsub" like others have mentioned.

irb(main)> "((String1))".gsub(/[)(]/, '')
=> "String1"

User · Answer

If you just want to remove the first two characters and the last two  then you can use negative indexes on the string   s      String1    s   s 2   -2  p s     gt   String1    If you want to remove all parentheses from the string you can use the delete method on the string class   s      String1    s delete       p s      gt   String1

User · Answer

Using String gsub with regular expression      String1    gsub                      gt   String1          parentheses      gsub                      gt    parentheses     This will remove surrounding parentheses only           This  is  string      gsub                      gt    This  is  string

User · Answer

For those coming across this and looking for performance  it looks like  delete and  tr are about the same in speed and 2-4x faster than gsub   text    Here is a string with   some forwa rd slashes  tr   Benchmark measure   10000 times   text tr                tr total   gt  0 01 delete   Benchmark measure   10000 times   text delete            delete total   gt  0 01 gsub   Benchmark measure   10000 times   text gsub                gsub total   gt  0 02 - 0 04

User · Answer

Do as below using String tr        String1    tr                gt   String1

[ruby] How to delete specific characters from a string in Ruby?

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