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Reverse a string in Python
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This is about 3 times slower.
– oneself
Oct 6 '17 at 15:09
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Why is reading lines from stdin much slower in C++ than Python?
...y, when an input stream is buffered, instead of reading one character at a time, the stream will be read in larger chunks. This reduces the number of system calls, which are typically relatively expensive. However, since the FILE* based stdio and iostreams often have separate implementations and t...
Bash command to sum a column of numbers [duplicate]
...wk since 2 tools are needed to do the job.
$ wc -l file
49999998 file
$ time paste -sd+ file | bc
1448700364
real 1m36.960s
user 1m24.515s
sys 0m1.772s
$ time awk '{s+=$1}END{print s}' file
1448700364
real 0m45.476s
user 0m40.756s
sys 0m0.287s
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How do I get time of a Python program's execution?
...e program in Python that takes a while to finish. I want to know the exact time it takes to finish running.
31 Answers
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Fast Linux File Count for a large number of files
...nd find call stat() when certain options are used, such as ls -l or find -mtime.
– mark4o
Jul 19 '10 at 23:46
7
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Display current date and time without punctuation
For example, I want to display current date and time as the following format:
5 Answers
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Convert datetime to Unix timestamp and convert it back in python
I have dt = datetime(2013,9,1,11) , and I would like to get a Unix timestamp of this datetime object.
11 Answers
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In Python, how do you convert a `datetime` object to seconds?
...difference between the two dates in seconds. Subtracting two dates gives a timedelta object, which as of Python 2.7 has a total_seconds() function.
>>> (t-datetime.datetime(1970,1,1)).total_seconds()
1256083200.0
The starting date is usually specified in UTC, so for proper results the da...
Bash script to calculate time elapsed
I am writing a script in bash to calculate the time elapsed for the execution of my commands, consider:
10 Answers
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Find element's index in pandas Series
...your series has a sequential integer index. If your series index is by datetime, this doesn't work.
– Andrew Medlin
Jul 7 '18 at 11:45
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