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How do I find the duplicates in a list and create another list with them?
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To remove duplicates use set(a). To print duplicates, something like:
a = [1,2,3,2,1,5,6,5,5,5]
import collections
print([item for item, count in collections.Counter(a).items() if count > 1])
## [1, 2, 5]
Note that Counter is not particularly...
How do you clear a slice in Go?
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@ChrisWeber: just iterate over the underlying array and set all the elements to a new value
– newacct
Jun 7 '13 at 14:02
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Variable name as a string in Javascript
...ere a way to get a variable name as a string in Javascript? (like NSStringFromSelector in Cocoa )
17 Answers
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File name? Path name? Base name? Naming standard for pieces of a path
...riving with one example from my side:
Consider the path C:\Documents and Settings\All Users\Application Data\s.sql.
C:\Documents and Settings\All Users\Application Data\s.sql is the full path (which is a file name)
C:\Documents and Settings\All Users\Application Data\ is the directory name.
No...
How to check if a value exists in an array in Ruby
...reverse method include? exists, for all Enumerables including Array, Hash, Set, Range:
['Cat', 'Dog', 'Bird'].include?('Unicorn') # => false
Note that if you have many values in your array, they will all be checked one after the other (i.e. O(n)), while that lookup for a hash will be constan...
How to add a downloaded .box file to Vagrant?
How do I add a downloaded .box file to Vagrant's list of available boxes? The .box file is located on an external drive.
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What does the constant 0.0039215689 represent?
... editor after snippets, if snippets enabled
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Python threading.timer - repeat function every 'n' seconds
... fire off a function every 0.5 seconds and be able to start and stop and reset the timer. I'm not too knowledgeable of how Python threads work and am having difficulties with the python timer.
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How to animate the change of image in an UIImageView?
... (graphic file), and want to display that in this UIImageView . If I just set
14 Answers
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How to pass in password to pg_dump?
...uding the last paragraph where it explains it will be ignored if you don't set the mode to 0600).
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