Don’t worry, there are only four. Fear Me Not Tips for Conquering Regular Expressions

Contrary to popular opinion, Regex doesn’t have to make you feel like this => Popular Opinion

Do I need help?

Do I need help? My name is Dana and I like Regular Expressions

Do I need help? My name is Dana and I like Regular Expressions It’s been two days since my last Regular Expression

When is the end really the end?

When is the end really the end? data[/\d+$/] # => "10"

When is the end really the end? data[/\d+$/] # => "10" attendance = "Women = 10 Men = 215 Total = 225 "

When is the end really the end? data[/\d+$/] # => "10" data[/\d+\z/] # => nil attendance = "Women = 10 Men = 215 Total = 225 "

When is the end really the end? data[/\d+$/] # => "10" data[/\d+\z/] # => nil data[/\d+\Z/] # => "225" attendance = "Women = 10 Men = 215 Total = 225 "

In Ruby dummy talk, please

In Ruby dummy talk, please Symbol WTF?

In Ruby dummy talk, please Symbol WTF? ^ Matches the beginning of any line - 100 lines means 100 matches

In Ruby dummy talk, please Symbol WTF? ^ Matches the beginning of any line - 100 lines means 100 matches \A Matches the beginning of the string - at most 1 match

In Ruby dummy talk, please Symbol WTF? ^ Matches the beginning of any line - 100 lines means 100 matches \A Matches the beginning of the string - at most 1 match $ Matches the end of any line - 100 lines means 100 matches

In Ruby dummy talk, please Symbol WTF? ^ Matches the beginning of any line - 100 lines means 100 matches \A Matches the beginning of the string - at most 1 match $ Matches the end of any line - 100 lines means 100 matches \z Matches the end of the string - at most 1 match

In Ruby dummy talk, please Symbol WTF? ^ Matches the beginning of any line - 100 lines means 100 matches \A Matches the beginning of the string - at most 1 match $ Matches the end of any line - 100 lines means 100 matches \z Matches the end of the string - at most 1 match \Z Matches the end of the string or just before the last \n - at most 1 match

Getting exactly what I want

Getting exactly what I want ["Gray is a great color.", "I like gray things.", "I’m hung up on a guy named Gray.", "He lives in Castle Grayskull."]

Getting exactly what I want ["Gray is a great color.", "I like gray things.", "I’m hung up on a guy named Gray.", "He lives in Castle Grayskull."] /(\W|\A)gray(\W|\Z)/i

Getting exactly what I want ["Gray is a great color.", "I like gray things.", "I’m hung up on a guy named Gray.", "He lives in Castle Grayskull."] /(\W|\A)gray(\W|\Z)/i /\bGray\b/i

Getting exactly what I want ["Gray is a great color.", "I like gray things.", "I’m hung up on a guy named Gray.", "He lives in Castle Grayskull."] /(\W|\A)gray(\W|\Z)/i /\bGray\b/i ["Gray is a great color.", "I like gray things.", "I’m hung up on a guy named Gray."]

Let’s discuss our differences What’s the difference between this - ( ... ) ! ! and this? - (?: ... )

Let’s discuss our differences What’s the difference between this - ( ... ) ! ! and this? - (?: ... ) phone = "123-456-7890" phone =~ /\A(\d+)-(\d+)-(\d+)\z/ puts "#{$1}#{$2}#{$3}" ! # >> 1234567890

Let’s discuss our differences What’s the difference between this - ( ... ) ! ! and this? - (?: ... ) phone = "123-456-7890" phone =~ /\A(\d+)-(\d+)-(\d+)\z/ puts "#{$1}#{$2}#{$3}" ! # >> 1234567890 name = "James Edward Gray II" name =~ /\A(\w+)(?:\s\w+)?\s(\w+)/ puts "#{$1} #{$2}" ! # >> James Gray

When you can’t make up your mind Sometimes you just can’t decide exactly what you want

When you can’t make up your mind Sometimes you just can’t decide exactly what you want /(42|41|40|...)/

When you can’t make up your mind Sometimes you just can’t decide exactly what you want /(42|41|40|...)/ /[0-9]/

When you can’t make up your mind Sometimes you just can’t decide exactly what you want /(42|41|40|...)/ /[0-9]/ /[1-3]?[0-9]/

When you can’t make up your mind Sometimes you just can’t decide exactly what you want /(42|41|40|...)/ /[0-9]/ /[1-3]?[0-9]/ /(4[0-2]|[1-3]?[0-9])/

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"Fear Regex".sub!(/\AFear\b/, "Embrace")