大约有 40,000 项符合查询结果（耗时：0.0376秒） [XML]
How to check if there exists a process with a given pid in Python?
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haridsv suggests the test should be e.errno != 3; perhaps e.errno != errno.ESRCH
– Jason R. Coombs
Feb 22 '12 at 12:12
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Get value of a string after last slash in JavaScript
...st three ways:
A regular expression:
var result = /[^/]*$/.exec("foo/bar/test.html")[0];
...which says "grab the series of characters not containing a slash" ([^/]*) at the end of the string ($). Then it grabs the matched characters from the returned match object by indexing into it ([0]); in a ...
Making button go full-width?
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tested with bootstrap V3 and "btn-block" worked for me
– Buddhika Alwis
Mar 10 '17 at 6:04
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How can I add or update a query string parameter?
...[?&])" + key + "=.*?(&|#|$)(.*)", "gi"),
hash;
if (re.test(url)) {
if (typeof value !== 'undefined' && value !== null) {
return url.replace(re, '$1' + key + "=" + value + '$2$3');
}
else {
hash = url.split('#');
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How to see which commits in one branch aren't in the other?
...his what I needed. It would also be nice to get a short description of the tests, but I can script this.
– Sascha Effert
Sep 28 '11 at 12:54
29
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Counting the number of True Booleans in a Python List
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Yes, for the top part. As I indicated, the Python test for a "true " (as in an if statement) is more complicated than just testing for True. See docs.python.org/py3k/library/stdtypes.html#truth. The True = 2 was just to reinforce that the concept of "true" is more complex;...
IN vs OR in the SQL WHERE Clause
...ied it with Oracle, and it was exactly the same.
CREATE TABLE performance_test AS ( SELECT * FROM dba_objects );
SELECT * FROM performance_test
WHERE object_name IN ('DBMS_STANDARD', 'DBMS_REGISTRY', 'DBMS_LOB' );
Even though the query uses IN, the Execution Plan says that it uses OR:
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Eclipse hangs on loading workbench
...ven better effect.
Here is a script for MacOS (using Macports) and Linux (tested on Ubuntu with Eclipse
Equinox) to do the start with an an optional kill of the running eclipse. You might want to adapt the script to your needs. If you add new platforms please edit the script right in this answer.
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Circle-Rectangle collision detection (intersection)
...the inner-product ( x= [x1,x2] , y = [y1,y2] , x*y = x1*y1 + x2*y2 )
your test would look like that:
//rectangle edges: TL (top left), TR (top right), BL (bottom left), BR (bottom right)
//point to test: POI
seperated = false
for egde in { {TL,TR}, {BL,BR}, {TL,BL},{TR-BR} }: // the edges
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Is there a version control system for database structure changes?
...ew script, and any developer can apply it to bring their local db to the latest version.
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