大约有 47,000 项符合查询结果（耗时：0.0743秒） [XML]
Check if table exists without using “select from”
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330
If you want to be correct, use INFORMATION_SCHEMA.
SELECT *
FROM information_schema.tables
WHE...
What's an object file in C?
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160
An object file is the real output from the compilation phase. It's mostly machine code, but has...
How can I make my own event in C#?
...ntHandler OnMaximum;
private int i;
private int Maximum = 10;
public int MyValue
{
get
{
return i;
}
set
{
if(value <= Maximum)
{
i = val...
git-checkout older revision of a file under a new name
..../<path> syntax (or ../path to go up from current directory).
Edit 2015-01-15: added information about relative path syntax
You can get in most cases the same output using low-level (plumbing) git cat-file command:
prompt> git cat-file blob HEAD^:main.cpp > old_main.cpp
...
Resize UIImage by keeping Aspect ratio and width
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230
The method of Srikar works very well, if you know both height and width of your new Size.
If you...
Regular expression for letters, numbers and - _
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209
The pattern you want is something like (see it on rubular.com):
^[a-zA-Z0-9_.-]*$
Explanatio...
Can I arrange repositories into folders on Github?
...epos.
But that won't support a nested folder organization. For now (June 2017), that only supports a nested team organization structure.
Update February 2019: you now have the concept of project:
See "User owned projects—your personal workspace "
You can also link up to 5 repositories to your pr...
How can I get enum possible values in a MySQL database?
...gt;query( "SHOW COLUMNS FROM {$table} WHERE Field = '{$field}'" )->row( 0 )->Type;
preg_match("/^enum\(\'(.*)\'\)$/", $type, $matches);
$enum = explode("','", $matches[1]);
return $enum;
}
share
|...
Download file from web in Python 3
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+50
If you want to obtain the contents of a web page into a variable, just read the response of urllib.request.urlopen:
import urllib.requ...
C++ error: undefined reference to 'clock_gettime' and 'clock_settime'
... Mark Lakata
17.2k55 gold badges8484 silver badges106106 bronze badges
answered Mar 10 '10 at 15:38
Dmitry YudakovDmitry Yudakov
...