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Is there a Unix utility to prepend timestamps to stdin?
...nto which would prepend each line with some text -- in my specific case, a timestamp. Ideally, the use would be something like:
...
Stripping everything but alphanumeric chars from a string in Python
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I just timed some functions out of curiosity. In these tests I'm removing non-alphanumeric characters from the string string.printable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was ...
Fastest way to convert string to integer in PHP
...
I've just set up a quick benchmarking exercise:
Function time to run 1 million iterations
--------------------------------------------
(int) "123": 0.55029
intval("123"): 1.0115 (183%)
(int) "0": 0.42461
intval("0"): 0.9...
Can you change what a symlink points to after it is created?
... place of the block list) if it is short enough; this is determined at the time it is created.
Regarding the assertion that the actual owner and group are immaterial, symlink(7) on Linux says that there is a case where it is significant:
The owner and group of an existing symbolic link ca...
Should IBOutlets be strong or weak under ARC?
...t that's not always going to be retained by the view
hierarchy. The only time you really need to make an outlet weak is if
you have a custom view that references something back up the view
hierarchy and in general that's not recommended.
I asked about this on Twitter to an engineer on the IB...
What is the fastest integer division supporting division by zero no matter what the result is?
...3 4 5; do gcc test.cc -o test -O -DITERATIONS=$it -DCHECK=$ch && { time=`time ./test`; echo "Iterations $it, check $ch: exit status $?, output $time"; }; done; done
shows output that can be summarised in a table:
Iterations → | 0 | 1 | 2 | 3 | 4 | 5
...
How do I set a variable to the output of a command in Bash?
..._connector.sh
tty
/dev/pts/20
ps --tty pts/20 fw
PID TTY STAT TIME COMMAND
29019 pts/20 Ss 0:00 bash
30745 pts/20 R+ 0:00 \_ ps --tty pts/20 fw
newConnector /usr/bin/bc "-l" '3*4' 12
ps --tty pts/20 fw
PID TTY STAT TIME COMMAND
29019 pts/20 Ss 0:00 ...
How to iterate through range of Dates in Java?
...
Well, you could do something like this using Java 8's time-API, for this problem specifically java.time.LocalDate (or the equivalent Joda Time classes for Java 7 and older)
for (LocalDate date = startDate; date.isBefore(endDate); date = date.plusDays(1))
{
...
}
I would t...
what’s the difference between Expires and Cache-Control headers?
...P date whereas Cache-Control max-age lets you specify a relative amount of time so you could specify "X hours after the page was requested".
HTML Cache control is a very similar question and has a good link to a caching tutorial that should answer most of your questions (e.g., http://www.mnot.net...
How do you calculate program run time in python? [duplicate]
How do you calculate program run time in python?
5 Answers
5
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