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hagiyat/optimize_nested_ternary_operator

Last active August 29, 2015 14:13
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三項演算子のネストを解消しつつワンライナーで書く
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optimize_nested_ternary_operator
cond1 = false
cond2 = true
# nested ternary operater
cond1 ? 'piyo' : (cond2 ? 'baz' : 'bar')
# use lambda
[->{'piyo' if cond1}, ->{'baz' if cond1 and cond2}, ->{'bar'}].lazy.map(&:call).select(&:present?).first
=> 'bar'
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