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Contents
class String
# Filters out words from a string based on block test.
#
# "a string".word_filter { |word| word =~ /^a/ } #=> "string"
#
def word_filter( &blk )
s = self.dup
s.word_filter!( &blk )
end
# In place version of #word_filter.
#
# "a string".word_filter { |word| ... }
#
def word_filter! #:yield:
rest_of_string = self
wordfind = /(\w+)/
offset = 0
while wmatch = wordfind.match(rest_of_string)
word = wmatch[0]
range = offset+wmatch.begin(0) ... offset+wmatch.end(0)
rest_of_string = wmatch.post_match
self[range] = yield( word ).to_s
offset = self.length - rest_of_string.length
end
self
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCString < Test::Unit::TestCase
def test_word_filter
s = "this is a test"
n = s.word_filter{ |w| "#{w}1" }
assert_equal( 'this1 is1 a1 test1', n )
end
def test_word_filter!
s = "this is a test"
s.word_filter!{ |w| "#{w}1" }
assert_equal( 'this1 is1 a1 test1', s )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems