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Redirecting stdout to “nothing” in python
... Sure, just save a reference to the original sys.stdout and set it back after. For example old_stdout = sys.stdout before any of the other code, then sys.stdout = old_stdout when you are done.
– Andrew Clark
Aug 20 '14 at 21:05
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How can I use “:” as an AWK field separator?
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You have multiple ways to set : as the separator:
awk -F: '{print $1}'
awk -v FS=: '{print $1}'
awk '{print $1}' FS=:
awk 'BEGIN{FS=":"} {print $1}'
All of them are equivalent and will return 1 given a sample input "1:2:3":
$ awk -F: '{print $1}' ...
Find files containing a given text
...hp|.html|.js containing the case-insensitive string "document.cookie" | "setcookie"
6 Answers
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How to output only captured groups with sed?
...wing insertion of a newline in the pattern space, one suggestion is:
> set string = "This is a sample 123 text and some 987 numbers"
>
> set pattern = "[0-9][0-9]*"
> echo $string | sed "s/$pattern/\n&\n/g" | sed -n "/$pattern/p"
123
987
> set pattern = "[a-z][a-z]*"
> echo $s...
How to convert list of tuples to multiple lists?
...eturn xs, ys
if __name__ == '__main__':
from timeit import timeit
setup_string='''\
N = 2000000
xs = list(range(1, N))
ys = list(range(N+1, N*2))
zs = list(zip(xs, ys))
from __main__ import t1, t2, t3
'''
print(f'zip:\t\t{timeit('t1(zs)', setup=setup_string, number=1000)}')
print(f'...
Is there a TRY CATCH command in Bash
...xception
}
Also bash contains some error handling mechanisms, as well
set -e
it stops your script if any simple command fails.
And also why not if...else. It is your best friend.
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How to ignore xargs commands if stdin input is empty?
... error code for no matching lines, so only activate error checks from here
set -e
set -o pipefail
echo $stdin | /usr/bin/xargs $@
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Bash syntax error: unexpected end of file
...se this as well
tip: use trap to debug, if your script is huge...
e.g.
set -x
trap read debug
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Outputting data from unit test in python
...message. To get msg appended to the normal error message, you also need to set TestCase.longMessage to True
– Catalin Iacob
Oct 21 '15 at 9:08
1
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MFC CString::Format()函数详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
MFC CString::Format()函数详解我在编写程序时经常会使用CString::Format()来格式化字符串！但往往只是使用了Format很少一部分功能，比如整型转换成字符串！不过今天我想...我在编写程序时经常会使用CString::Format()来格式化字符串！但...