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Understanding dict.copy() - shallow or deep?
...ed by value, but just creating a new reference.
>>> a = {1: [1,2,3]}
>>> b = a.copy()
>>> a, b
({1: [1, 2, 3]}, {1: [1, 2, 3]})
>>> a[1].append(4)
>>> a, b
({1: [1, 2, 3, 4]}, {1: [1, 2, 3, 4]})
In contrast, a deep copy will copy all contents by value....
How can I get the concatenation of two lists in Python without modifying either one? [duplicate]
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edited Mar 10 at 13:01
phoenix
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answered D...
Markdown: continue numbered list
In the following markdown code I want item 3 to start with list number 3. But because of the code block in between markdown starts this list item as a new list. Is there any way to prevent that behaviour?
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Integrate ZXing in Android Studio
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234
I was integrating ZXING into an Android application and there were no good sources for the inpu...
What's the difference between HEAD^ and HEAD~ in Git?
...t rev-parse documentation defines ~ as
<rev>~<n>, e.g. master~3
A suffix ~<n> to a revision parameter means the commit object that is the nth generation ancestor of the named commit object, following only the first parents. For example, <rev>~3 is equivalent to <rev>^^...
How to split a delimited string in Ruby and convert it to an array?
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>> "1,2,3,4".split(",")
=> ["1", "2", "3", "4"]
Or for integers:
>> "1,2,3,4".split(",").map { |s| s.to_i }
=> [1, 2, 3, 4]
Or for later versions of ruby (>= 1.9 - as pointed out by Alex):
>> "1,2,3,4".spli...
With bash, how can I pipe standard error into another process?
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mmlb
74777 silver badges2323 bronze badges
answered Mar 27 '12 at 11:28
ScotScot
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How to remove specific elements in a numpy array
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306
Use numpy.delete() - returns a new array with sub-arrays along an axis deleted
numpy.delete(a...
Array to Hash Ruby
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360
a = ["item 1", "item 2", "item 3", "item 4"]
h = Hash[*a] # => { "item 1" => "item 2", "...
How to delete duplicates on a MySQL table?
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answered Apr 13 '10 at 14:52
user187291user187291
49.5k1818 gold badges8686 silver badges127127 bronze badges
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