ruby/doc/matchdata/offset.rdoc

32 строки
999 B
Plaintext

Returns a 2-element array containing the beginning and ending
offsets (in characters) of the specified match.
When non-negative integer argument +n+ is given,
returns the starting and ending offsets of the <tt>n</tt>th match:
m = /(.)(.)(\d+)(\d)/.match("THX1138.")
# => #<MatchData "HX1138" 1:"H" 2:"X" 3:"113" 4:"8">
m[0] # => "HX1138"
m.offset(0) # => [1, 7]
m[3] # => "113"
m.offset(3) # => [3, 6]
m = /(т)(е)(с)/.match('тест')
# => #<MatchData "тес" 1:"т" 2:"е" 3:"с">
m[0] # => "тес"
m.offset(0) # => [0, 3]
m[3] # => "с"
m.offset(3) # => [2, 3]
When string or symbol argument +name+ is given,
returns the starting and ending offsets for the named match:
m = /(?<foo>.)(.)(?<bar>.)/.match("hoge")
# => #<MatchData "hog" foo:"h" bar:"g">
m[:foo] # => "h"
m.offset('foo') # => [0, 1]
m[:bar] # => "g"
m.offset(:bar) # => [2, 3]
Related: MatchData#byteoffset, MatchData#begin, MatchData#end.