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List comprehension in Ruby
...k.nil?
self.collect(&block).compact
end
end
some_array = [1, 2, 3, 4, 5, 6]
new_array = some_array.comprehend {|x| x * 3 if x % 2 == 0}
puts new_array
Prints:
6
12
18
I would probably just do it the way you did though.
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What are good message queue options for nodejs? [closed]
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edited May 23 '17 at 12:10
Community♦
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answered Jan 15 '11 at 20:37
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How to create a bash script to check the SSH connection?
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edited Mar 4 '13 at 15:22
Tim Cooper
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Xcode debugger doesn't print objects and shows nil, when they aren't
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edited Nov 30 '13 at 2:38
Ry-♦
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What's the best way to validate an XML file against an XSD file?
I'm generating some xml files that needs to conform to an xsd file that was given to me. What's the best way to verify they conform?
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Overload with different return type in Java?
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answered Mar 13 '10 at 19:51
Alexander GesslerAlexander Gessler
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how to concatenate two dictionaries to create a new one in Python? [duplicate]
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Slowest and doesn't work in Python3: concatenate the items and call dict on the resulting list:
$ python -mtimeit -s'd1={1:2,3:4}; d2={5:6,7:9}; d3={10:8,13:22}' \
'd4 = dict(d1.items() + d2.items() + d3.items())'
100000 loops, best of 3: 4.93 usec per loop...
Regex to test if string begins with http:// or https://
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361
Your use of [] is incorrect -- note that [] denotes a character class and will therefore only ...
Create Git branch with current changes
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730
If you hadn't made any commit yet, only (1: branch) and (3: checkout) would be enough.
Or, in o...