Created
April 27, 2018 21:57
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| irb(main):006:0> def foo(a, b = "contains #{a}") | |
| irb(main):007:1> puts a | |
| irb(main):008:1> puts b | |
| irb(main):009:1> end | |
| => :foo | |
| irb(main):010:0> foo("things") | |
| things | |
| contains things | |
| => nil |
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