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TimothyClayton/presence_exp.rb

Last active September 26, 2016 19:39
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Set default value when blank values are potentially returned
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presence_exp.rb
# The immediate tendency is to go with a ternary, a la:
hash[:key].present? ? hash[:key] : 'default'
# To save a little on ABC complexity, I like `#presence`:
```
>> h = { a: "I'm here" }
>> h[:a].presence || 'default'
"I'm here"
>> h = { a: nil }
>> h[:a].presence || 'default'
"default"
>> h = { a: '' }
>> h[:a].presence || 'default'
"default"
>> h = { a: [] }
>> h[:a].presence || 'default'
"default"
# Also works when hash does not have key
>> h[:b].presence || 'default'
"default"
```
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