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tiegz/array_one?_method_usage.rb

Created June 9, 2012 05:58
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Using the method Array#one? in ruby
Raw
array_one?_method_usage.rb
# The method Array#one? in ruby is intended to be used with a block. It does *not* signify that
# there is one element in the array:
1.8.7 :066 > [1,2,3].one?
=> false
1.8.7 :067 > [1,nil,nil].one?
=> true
# Also, it is slower than just checking the array's size:
1.8.7 :047 > Benchmark.ms { 10000.times { [1,2,3].size == 1 } }
=> 7.34710693359375
1.8.7 :055 > Benchmark.ms { 10000.times { [1,2,3].one? } }
=> 13.7670040130615
Raw
array_one_method_usage.rb
# The method Array#one? in ruby is intended to be used with a block. It does *not* signify that
# there is one element in the array:
1.8.7 :066 > [1,2,3].one?
=> false
1.8.7 :067 > [1,nil,nil].one?
=> true
# Also, it is slower than just checking the array's size:
1.8.7 :047 > Benchmark.ms { 10000.times { [1,2,3].size == 1 } }
=> 7.34710693359375
1.8.7 :055 > Benchmark.ms { 10000.times { [1,2,3].one? } }
=> 13.7670040130615
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