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What is the difference between a mutable and immutable string in C#?
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edited May 22 '18 at 7:34
answered Nov 25 '10 at 6:18
Ste...
What is the purpose of the single underscore “_” variable in Python?
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edited Jul 4 at 18:54
user5994461
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answered May ...
How to select an option from drop down using Selenium WebDriver C#?
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edited Oct 20 '16 at 7:46
Matthew Lock
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an...
What is a Python equivalent of PHP's var_dump()? [duplicate]
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edited Mar 24 '17 at 22:08
Nikita
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How to check if a string is a valid hex color representation?
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edited Sep 18 '19 at 14:33
Gust van de Wal
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answered Nov 6 ...
Are tuples more efficient than lists in Python?
...much faster than assigning a list.
>>> def a():
... x=[1,2,3,4,5]
... y=x[2]
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>>> def b():
... x=(1,2,3,4,5)
... y=x[2]
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>>> import dis
>>> dis.dis(a)
2 0 LOAD_CONST 1 (1)
3 LOAD_CONST 2 ...
#import using angle brackets < > and quote marks “ ”
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answered Jun 25 '09 at 14:53
Mark PimMark Pim
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How to run a PowerShell script without displaying a window?
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edited Nov 30 '09 at 14:47
answered Nov 26 '09 at 10:22
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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...subset='index', keep='first').set_index('index')
1000 loops, best of 3: 1.54 ms per loop
>>> %timeit df3.groupby(df3.index).first()
1000 loops, best of 3: 580 µs per loop
>>> %timeit df3[~df3.index.duplicated(keep='first')]
1000 loops, best of 3: 307 µs per loop
Note that you ...
How do shift operators work in Java? [duplicate]
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System.out.println(Integer.toBinaryString(2 << 11));
Shifts binary 2(10) by 11 times to...