Mercurial > repos > other > SevenLanguagesInSevenWeeks
annotate 1-Ruby/truthiness-irb.output @ 97:85a5e9a6ef5c
Add more notes on extracting Just/Maybe values
| author | IBBoard <dev@ibboard.co.uk> |
|---|---|
| date | Sun, 30 Jun 2019 16:09:44 +0100 |
| parents | 8d46064c9afc |
| children |
| rev | line source |
|---|---|
| 11 | 1 truthiness.rb(main):001:0> #! /usr/bin/env ruby |
| 2 truthiness.rb(main):002:0* | |
| 3 truthiness.rb(main):003:0* values = [ true, false, 1, 0, -1, 'some string', '', nil ] | |
| 4 => [true, false, 1, 0, -1, "some string", "", nil] | |
| 5 truthiness.rb(main):004:0> | |
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16
8d46064c9afc
Be a nice Ruby user and follow block convention for do/end vs {}
IBBoard <dev@ibboard.co.uk>
parents:
11
diff
changeset
|
6 truthiness.rb(main):005:0* values.each do |val| |
| 11 | 7 truthiness.rb(main):006:1* text = if val == nil then "nil" else "'#{val}'" end |
| 8 truthiness.rb(main):007:1> puts "Val #{text} is truthy" if val | |
| 9 truthiness.rb(main):008:1> puts "Val #{text} is falsy" unless val | |
|
16
8d46064c9afc
Be a nice Ruby user and follow block convention for do/end vs {}
IBBoard <dev@ibboard.co.uk>
parents:
11
diff
changeset
|
10 truthiness.rb(main):009:1> end |
| 11 | 11 Val 'true' is truthy |
| 12 Val 'false' is falsy | |
| 13 Val '1' is truthy | |
| 14 Val '0' is truthy | |
| 15 Val '-1' is truthy | |
| 16 Val 'some string' is truthy | |
| 17 Val '' is truthy | |
| 18 Val nil is falsy | |
| 19 => [true, false, 1, 0, -1, "some string", "", nil] | |
| 20 truthiness.rb(main):010:0> |