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List of lists changes reflected across sublists unexpectedly
...it:
x = [1] * 4
l = [x] * 3
print(f"id(x): {id(x)}")
# id(x): 140560897920048
print(
f"id(l[0]): {id(l[0])}\n"
f"id(l[1]): {id(l[1])}\n"
f"id(l[2]): {id(l[2])}"
)
# id(l[0]): 140560897920048
# id(l[1]): 140560897920048
# id(l[2]): 140560897920048
x[0] = 42
print(f"x: {x}")
# x: [42, 1,...
How to concatenate string variables in Bash
... "X Y+Z"
– phpguru
Feb 13 '17 at 19:04
6
A bashism is a shell feature which is only supported in ...
Most common C# bitwise operations on enums
...The idiom is to use the bitwise or-equal operator to set bits:
flags |= 0x04;
To clear a bit, the idiom is to use bitwise and with negation:
flags &= ~0x04;
Sometimes you have an offset that identifies your bit, and then the idiom is to use these combined with left-shift:
flags |= 1 <&...
Using os.walk() to recursively traverse directories in Python
...ur code?
– stelios
Jul 27 '17 at 17:04
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How do I schedule jobs in Jenkins?
... just saying
– Stunner
Aug 14 at 5:04
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What are 'closures' in .NET?
...
answered Jan 9 '09 at 16:04
Jon SkeetJon Skeet
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How do I format a number in Java?
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answered Sep 8 '08 at 20:04
EspoEspo
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Creating and playing a sound in swift
... Framework
– eharo2
Sep 2 '14 at 15:04
@JochenBedersdorfer, you're probably getting an error due to Core Foundation ob...
Android: How to turn screen on and off programmatically?
...
answered Aug 10 '15 at 6:04
mangu23mangu23
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mailto link with HTML body
...
answered Feb 23 '12 at 11:04
AndyAndy
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