annotate 1-Ruby/day2-grep.rb @ 29:9c7af76fdbd0
Print isn't PrinLn, so add some \n characters to the output
| author |
IBBoard <dev@ibboard.co.uk> |
| date |
Wed, 06 Sep 2017 18:36:02 +0100 |
| parents |
720e9201dd98 |
| children |
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| rev |
line source |
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23
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1 #! /usr/bin/env ruby
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2
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3 if ARGV.length != 2
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4 abort("Incorrect arguments - pass a single file and a pattern")
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5 elsif not File.exist? (ARGV[0])
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6 abort ("File #{ARGV[0]} did not exist")
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7 end
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8
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9 file = ARGV[0]
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10 pattern = Regexp.new(ARGV[1])
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11 i = 0
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12 File.open(file, "r").each_line do |line|
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13 i+= 1
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14 if line =~ pattern then
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15 puts "#{i} #{line}"
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16 end
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17 end |
