How to match all occurrences of a regex

Question

Is there a quick way to find every match of a regular expression in Ruby  I ve looked through the Regex object in the Ruby STL and searched on Google to no avail

User · Accepted Answer

Using scan should do the trick   string scan  regex

User · Answer

if you have a regexp with groups   str  A 54mpl3 string w1th 7 numbers scatter3r ar0und  re    d   m-t     you can use String s scan method to find matching groups   str scan re   gt     54      1      3      To find the matching pattern   str to enum  scan re  map    amp     gt    54m    1t    3r

User · Answer

You can use string scan your regex  flatten  If your regex contains groups  it will return in a single plain array    string    A 54mpl3 string w1th 7 numbers scatter3r ar0und  your regex      d   m-t   string scan your regex  flatten   gt    54    1    3     Regex can be a named group as well   string    group photo jpg  regex     A   lt name gt         lt ext gt     z  string scan regex  flatten   You can also use gsub  it s just one more way if you want MatchData   str gsub   d   map  Regexp last match

User · Answer

To find all the matching strings  use String s scan method   str    A 54mpl3 string w1th 7 numb3rs scatter36 ar0und  str scan   d       gt    54    3    1    7    3    36    0     If you want  MatchData  which is the type of the object returned by the Regexp match method  use   str to enum  scan    d    map   Regexp last match      gt     lt MatchData  54  gt     lt MatchData  3  gt     lt MatchData  1  gt     lt MatchData  7  gt     lt MatchData  3  gt     lt MatchData  36  gt     lt MatchData  0  gt     The benefit of using MatchData is that you can use methods like offset   match datas   str to enum  scan    d    map   Regexp last match   match datas 0  offset 0     gt   2  4  match datas 1  offset 0     gt   7  8    See these questions if you d like to know more     How do I get the match data for all occurrences of a Ruby regular expression in a string    Ruby regular expression matching enumerator with named capture support   How to find out the starting point for each match in ruby    Reading about special variables   amp        1   2 in Ruby will be helpful too

User · Answer

To find all the matching strings  use String s scan method   str    A 54mpl3 string w1th 7 numb3rs scatter36 ar0und  str scan   d       gt    54    3    1    7    3    36    0     If you want  MatchData  which is the type of the object returned by the Regexp match method  use   str to enum  scan    d    map   Regexp last match      gt     lt MatchData  54  gt     lt MatchData  3  gt     lt MatchData  1  gt     lt MatchData  7  gt     lt MatchData  3  gt     lt MatchData  36  gt     lt MatchData  0  gt     The benefit of using MatchData is that you can use methods like offset   match datas   str to enum  scan    d    map   Regexp last match   match datas 0  offset 0     gt   2  4  match datas 1  offset 0     gt   7  8    See these questions if you d like to know more     How do I get the match data for all occurrences of a Ruby regular expression in a string    Ruby regular expression matching enumerator with named capture support   How to find out the starting point for each match in ruby    Reading about special variables   amp        1   2 in Ruby will be helpful too

User · Answer

if you have a regexp with groups   str  A 54mpl3 string w1th 7 numbers scatter3r ar0und  re    d   m-t     you can use String s scan method to find matching groups   str scan re   gt     54      1      3      To find the matching pattern   str to enum  scan re  map    amp     gt    54m    1t    3r

User · Answer

You can use string scan your regex  flatten  If your regex contains groups  it will return in a single plain array    string    A 54mpl3 string w1th 7 numbers scatter3r ar0und  your regex      d   m-t   string scan your regex  flatten   gt    54    1    3     Regex can be a named group as well   string    group photo jpg  regex     A   lt name gt         lt ext gt     z  string scan regex  flatten   You can also use gsub  it s just one more way if you want MatchData   str gsub   d   map  Regexp last match

[ruby] How to match all occurrences of a regex

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