大约有 44,000 项符合查询结果（耗时：0.0643秒） [XML]
Telling gcc directly to link a library statically
... to link with statically. After all I'm telling gcc directly all other information about linking with libraries ( -Ldir , -llibname ).
...
RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
...4 characters. So it makes no difference to change .+ into .* or even .{4,} for that matter.
– Bart Kiers
Oct 14 '09 at 10:03
...
Difference between setUp() and setUpBeforeClass()
...t testing with JUnit, there are two similar methods, setUp() and setUpBeforeClass() . What is the difference between these methods? Also, what is the difference between tearDown() and tearDownAfterClass() ?
...
Matplotlib (pyplot) savefig outputs blank image
...o deal with this, you can
Call plt.savefig('tessstttyyy.png', dpi=100) before you call plt.show()
Save the figure before you show() by calling plt.gcf() for "get current figure", then you can call savefig() on this Figure object at any time.
For example:
fig1 = plt.gcf()
plt.show()
plt.draw()
...
Regular expression for letters, numbers and - _
...',
'screen-new-file.css',
'screen_new.js',
'screen new file.css'
);
foreach ($arr as $s) {
if (preg_match('/^[\w.-]*$/', $s)) {
print "$s is a match\n";
} else {
print "$s is NO match!!!\n";
};
}
?>
The above prints (as seen on ideone.com):
screen123.css is a match
screen...
Active Record - Find records which were created_at before today
...able.where(created_at: Date.new..2.days.ago)
Note that you can also look for records with fields containing fields in the future in similar way, i.e. to get all records of MyTable with an event_date at least 2 days from now:
MyTable.where(event_date: 2.days.from_now..DateTime::Infinity.new)
...
Are PostgreSQL column names case-sensitive?
...per-case letters (and/or other syntax violations) have to be double-quoted for the rest of their life: ("first_Name")
So, yes, PostgreSQL column names are case-sensitive:
SELECT * FROM persons WHERE "first_Name" = 'xyz';
Also fix the incorrect double-quotes around 'xyz'. Values (string literals)...
Difference between -pthread and -lpthread while compiling
...mpiler to link in the pthread library as well as configure the compilation for threads.
For example, the following shows the macros that get defined when the -pthread option gets used on the GCC package installed on my Ubuntu machine:
$ gcc -pthread -E -dM test.c > dm.pthread.txt
$ gcc ...
How to gzip all files in all sub-directories into one compressed file in bash
...ed to do something slightly different. I need to produce one big gzip file for all files under a certain directory. I also need to be able to specify the output filename for the compressed file (e.g., files.gz) and overwrite the old compressed file file if one already exists.
...
How can I change Eclipse theme?
...arge range of editor themes. My preferred one to use with PyDev is Wombat. For Java Solarized Dark
share
|
improve this answer
|
follow
|
...