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How can I time a code segment for testing performance with Pythons timeit?
...e and after the block you want to time.
import time
t0 = time.time()
code_block
t1 = time.time()
total = t1-t0
This method is not as exact as timeit (it does not average several runs) but it is straightforward.
time.time() (in Windows and Linux) and time.clock() (in Linux) are not precise eno...
Capturing Groups From a Grep RegEx
...e using Bash, you don't even have to use grep:
files="*.jpg"
regex="[0-9]+_([a-z]+)_[0-9a-z]*"
for f in $files # unquoted in order to allow the glob to expand
do
if [[ $f =~ $regex ]]
then
name="${BASH_REMATCH[1]}"
echo "${name}.jpg" # concatenate strings
name=...
Efficiently test if a port is open on Linux?
...tors. To use:
exec 6<>/dev/tcp/ip.addr.of.server/445
echo -e "GET / HTTP/1.0\n" >&6
cat <&6
I'm using 6 as the file descriptor because 0,1,2 are stdin, stdout, and stderr. 5 is sometimes used by Bash for child processes, so 3,4,6,7,8, and 9 should be safe.
As per the comment ...
mysql error 1364 Field doesn't have a default values
...e. Removing that setting and restarting MySQL should fix the problem.
See https://www.farbeyondcode.com/Solution-for-MariaDB-Field--xxx--doesn-t-have-a-default-value-5-2720.html
If editing that file doesn't fix the issue, see http://dev.mysql.com/doc/refman/5.6/en/option-files.html for other possi...
How do I create a URL shortener?
...write a long URL into an input field and the service shortens the URL to " http://www.example.org/abcdef ".
30 Answers
...
Algorithm to detect intersection of two rectangles?
...e. It would only have been a separating edge if that had not been the case
http://www.iassess.com/collision.png
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Apache not starting on MAMP Pro
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I updated to the lat...
CreateWindow()动态创建一个EditBox - C/C++ - 清泛网 - 专注C/C++及内核技术
...CDialogEx)
...
ON_EN_CHANGE(IDC_EDIT_SEARCH, OnSearchEditCommand)
END_MESSAGE_MAP()
void CMainDlg::OnSearchEditCommand()
{
CString strSearch;
GetDlgItemText(IDC_EDIT_SEARCH, strSearch);
AfxMessageBox(strSearch);
}
这样，文本框中有输...
【解决】Missing FindPython3.cmake - C/C++ - 清泛网 - 专注IT技能提升
...usr/bin/
4、检查版本： cmake --version
参考：https://m.linuxidc.com/Linux/2018-09/154165.htmcmake
【解决】Missing FindPython3.cmake - C/C++ - 清泛网 - 专注IT技能提升
...usr/bin/
4、检查版本： cmake --version
参考：https://m.linuxidc.com/Linux/2018-09/154165.htmcmake