Sha256: bf58c8be5294b4ddfe59dd6e0a0ee3dcac7aefc090a916da992aee7c676fea3a
Contents?: true
Size: 1.72 KB
Versions: 10
Compression:
Stored size: 1.72 KB
Contents
# TITLE:
#
# String Range Extension
#
# SUMMARY:
#
# Extensions to string for localing ranges of substrings.
#
# CREDIT:
#
# - Thomas Sawyer
#
class String
# Like #index but returns a Range.
#
# "This is a test!".range('test') #=> 10..13
#
def range(s, offset=0)
if index(s, offset)
return ($~.begin(0))..($~.end(0)-1)
end
nil
end
# Like #index_all but returns an array of Ranges.
#
# "abc123abc123".range_all('abc') #=> [0..2, 6..8]
#
#--
# Note: should add offset ?
#++
def range_all(s, reuse=false)
r = []; i = 0
while i < self.length
rng = range(s, i)
if rng
r << rng
i += reuse ? 1 : rng.end + 1
else
break
end
end
r.uniq
end
# Returns an array of ranges mapping
# the characters per line.
#
# "this\nis\na\ntest".range_of_line
# #=> [0..4, 5..7, 8..9, 10..13]
#
def range_of_line
offset=0; charmap = []
self.each do |line|
charmap << (offset..(offset + line.length - 1))
offset += line.length
end
charmap
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TestStringRange < Test::Unit::TestCase
def test_range
assert_equal( (1..3), "a123a567a9".range(/123/) )
assert_equal( (0..0), "a123a567a9".range(/a/) )
end
def test_range_all
assert_equal( [ (1..3), (5..7) ], "a123a123a9".range_all(/123/) )
assert_equal( [ (0..0), (4..4), (8..8) ], "a123a567a9".range_all(/a/) )
end
def test_range_of_line
a = "0123\n456\n78"
ltcm = a.range_of_line
assert_equal( [0..4, 5..8, 9..10], ltcm )
end
end
=end
Version data entries
10 entries across 10 versions & 1 rubygems