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List comprehension in Ruby
...lock.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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Getting key with maximum value in dictionary?
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25 Answers
25
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jQuery's jquery-1.10.2.min.map is triggering a 404 (Not Found)
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1273
If Chrome DevTools is reporting a 404 for a .map file (maybe jquery-1.10.2.min.map, jquery.min...
initializing a boolean array in java
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286
I just need to initialize all the array elements to Boolean false.
Either use boolean[] i...
How to get the instance id from within an ec2 instance?
How can I find out the instance id of an ec2 instance from within the ec2 instance?
32 Answers
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Take the content of a list and append it to another list
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You probably want
list2.extend(list1)
instead of
list2.append(list1)
Here's the difference:
>>> a = range(5)
>>> b = range(3)
>>> c = range(2)
>>> b.append(a)
>>> b
[0, 1, 2, [0, 1, 2, 3, 4]]
>...
How to create NS_OPTIONS-style bitmask enumerations in Swift?
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261
Swift 3.0
Almost identical to Swift 2.0. OptionSetType was renamed to OptionSet and enums are...
Is there “0b” or something similar to represent a binary number in Javascript
...xadecimal numbers in Javascript. For example, 0xFF stands for the number 255.
10 Answers
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Trying to SSH into an Amazon Ec2 instance - permission error
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29 Answers
29
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How to pretty print nested dictionaries?
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21 Answers
21
Active
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