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I want to name the capture of string that I get from scan. How to do it?
"555-333-7777".scan(/(\d{3})-(\d{3})-(\d{4})/).flatten #=> ["555", "333", "7777"] Is it possible to turn it into like this
{:area => "555", :city => "333", :local => "7777" } or
[["555","area"], [...]] I tried
"555-333-7777".scan(/((?<area>)\d{3})-(\d{3})-(\d{4})/).flatten but it returns
[] 
837
If your regular expression has named capturing groups, then you should use named backreferences to them in the replacement text. The regex (?' name'group) has one group called “name”. You can reference this group with ${name} in the JGsoft applications, Delphi, .
Short for regular expression, a regex is a string of text that lets you create patterns that help match, locate, and manage text. Perl is a great example of a programming language that utilizes regular expressions. However, its only one of the many places you can find regular expressions.
Non-capturing groups are important constructs within Java Regular Expressions. They create a sub-pattern that functions as a single unit but does not save the matched character sequence. In this tutorial, we'll explore how to use non-capturing groups in Java Regular Expressions.
To find all the matching strings, use String's scan method.
You should use match with named captures, not scan
m = "555-333-7777".match(/(?<area>\d{3})-(?<city>\d{3})-(?<number>\d{4})/) m # => #<MatchData "555-333-7777" area:"555" city:"333" number:"7777"> m[:area] # => "555" m[:city] # => "333" If you want an actual hash, you can use something like this:
m.names.zip(m.captures).to_h # => {"area"=>"555", "city"=>"333", "number"=>"7777"} Or this (ruby 2.4 or later)
m.named_captures # => {"area"=>"555", "city"=>"333", "number"=>"7777"} If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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