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What is “:-!!” in C code?
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@weston Lots of different places. See for yourself!
– John Feminella
Feb 10 '12 at 16:06
170
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Match multiple cases classes in scala
...println(aString)"? Seems like as long as the type of aString is identical for both A and B, it should be allowed. Your last example seems like it would be better off not duplicating the B and C cases.
– James Moore
Nov 9 '11 at 1:18
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SSMS插件开发指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...Data\Application Data\Microsoft\MSEnvShared\Addins\)
Will install add-in for all users on the machine.
Putting SSMSAddin.addin into %APPDATA%\Microsoft\MSEnvShared\Addins\
(C:\Users\UserName\AppData\Roaming\Microsoft\MSEnvShared\Addins\)
will install for specific user only.
OnConnecti...
Get the current script file name
...u the .php file that line is in, you actually want $_SERVER['SCRIPT_NAME'] for the currently running top-level script (that which was invoked by the web server or directly on the command line)
– Drew Stephens
Apr 28 '11 at 17:34
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Auto-center map with multiple markers in Google Maps API v3
...ds rather than creating one explicitly from two points. (See this question for more details)
Should look something like this, added to your code:
//create empty LatLngBounds object
var bounds = new google.maps.LatLngBounds();
var infowindow = new google.maps.InfoWindow();
for (i = 0; i < l...
Equals(=) vs. LIKE
...Allow me to quote from the MySQL manual:
Per the SQL standard, LIKE performs matching on a per-character basis, thus it can produce results different from the = comparison operator:
mysql> SELECT 'ä' LIKE 'ae' COLLATE latin1_german2_ci;
+-----------------------------------------+
| 'ä' LI...
Split data frame string column into multiple columns
I'd like to take data of the form
15 Answers
15
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Best way to select random rows PostgreSQL
...equential scan of the big table, only an index scan.
First, get estimates for the main query:
SELECT count(*) AS ct -- optional
, min(id) AS min_id
, max(id) AS max_id
, max(id) - min(id) AS id_span
FROM big;
The only possibly expensive part is the count(*) (for h...
Why are preprocessor macros evil and what are the alternatives?
... never received a really good answer; I think that almost any programmer before even writing the first "Hello World" had encountered a phrase like "macro should never be used", "macro are evil" and so on, my question is: why? With the new C++11 is there a real alternative after so many years?
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not None test in Python [duplicate]
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if val is not None:
# ...
is the Pythonic idiom for testing that a variable is not set to None. This idiom has particular uses in the case of declaring keyword functions with default parameters. is tests identity in Python. Because there is one and only one instance of Non...