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JOIN queries vs multiple queries
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edited Jun 24 '11 at 20:28
Community♦
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answered Jul 1 '09 at 2:27
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How to strip all whitespace from string
...initial timings:
$ python -m timeit '"".join(" \t foo \n bar ".split())'
1000000 loops, best of 3: 1.38 usec per loop
$ python -m timeit -s 'import re' 're.sub(r"\s+", "", " \t foo \n bar ")'
100000 loops, best of 3: 15.6 usec per loop
Note the regex is cached, so it's not as slow as you'd imagin...
What do column flags mean in MySQL Workbench?
...values.)
UN - Unsigned (non-negative numbers only. so if the range is -500 to 500, instead its 0 - 1000, the range is the same but it starts at 0)
UQ - Create/remove Unique Key
ZF - Zero-Filled (if the length is 5 like INT(5) then every field is filled with 0’s to the 5th digit. 12 = 0001...
How to save a list as numpy array in python?
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yatu
68.7k99 gold badges3434 silver badges8080 bronze badges
answered May 10 '11 at 13:57
Bryce SiedschlawBryce Siedschlaw
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Run automatically program on startup under linux ubuntu [closed]
...ent argument set for the above example is
sudo update-rc.d filename start 20 2 3 4 5 . stop 20 0 1 6 .
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Convert all strings in a list to int
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1210
Use the map function (in Python 2.x):
results = map(int, results)
In Python 3, you will need ...
svn强制设定commit时写一定长度的日志 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...al
set REPOS=%1
set TXN=%2
rem check that logmessage contains at least 30 characters
c:\svnlook log "%REPOS%" -t "%TXN%" | findstr ".............................." > nul
if %errorlevel% gtr 0 goto err
exit 0
:err
echo that logmessage contains at least 30 alphanumeric characters. Commit abort...
How can I pass a member function where a free function is expected?
...void* context) {
fptr(context, 17, 42);
}
void non_member(void*, int i0, int i1) {
std::cout << "I don't need any context! i0=" << i0 << " i1=" << i1 << "\n";
}
struct foo {
void member(int i0, int i1) {
std::cout << "member function: this=" ...
Why does Javascript's regex.exec() not always return the same value? [duplicate]
... of the last match.
When no more matches are found, the index is reset to 0 automatically.
To reset it manually, set the lastIndex property.
reg.lastIndex = 0;
This can be a very useful feature. You can start the evaluation at any point in the string if desired, or if in a loop, you can sto...
How to remove/ignore :hover css style on touch devices
...art' in document.documentElement
|| navigator.maxTouchPoints > 0
|| navigator.msMaxTouchPoints > 0;
}
if (hasTouch()) { // remove all the :hover stylesheets
try { // prevent exception on browsers not supporting DOM styleSheets properly
for (var si in document.styleShee...