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Difference between Python's Generators and Iterators
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569
iterator is a more general concept: any object whose class has a __next__ method (next in Pyth...
Keeping ASP.NET Session Open / Alive
...my Session alive:
function setHeartbeat() {
setTimeout("heartbeat()", 5*60*1000); // every 5 min
}
function heartbeat() {
$.get(
"/SessionHeartbeat.ashx",
null,
function(data) {
//$("#heartbeat").show().fadeOut(1000); // just a little "red flash" in the ...
How do you serialize a model instance in Django?
... Deserialization also requires an extra step; see stackoverflow.com/a/29550004/2800876
– Zags
Apr 9 '15 at 22:17
5
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How to sum up elements of a C++ vector?
... community wiki
17 revs, 6 users 65%Prasoon Saurav
6
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How to use GROUP BY to concatenate strings in MySQL?
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543
SELECT id, GROUP_CONCAT(name SEPARATOR ' ') FROM table GROUP BY id;
http://dev.mysql.com/doc...
Removing nan values from an array
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375
If you're using numpy for your arrays, you can also use
x = x[numpy.logical_not(numpy.isnan(x))...
How to stop a goroutine
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52
EDIT: I wrote this answer up in haste, before realizing that your question is about sending val...
How to set NODE_ENV to production/development in OS X
... |
edited Aug 24 at 15:11
Petro Franko
1,2781212 silver badges1515 bronze badges
answered Feb 9 '12...
How do I test for an empty JavaScript object?
...
57 Answers
57
Active
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Count(*) vs Count(1) - SQL Server
...NT(*) is mentioned specifically in ANSI-92 (look for "Scalar expressions 125")
Case:
a) If COUNT(*) is specified, then the result is the cardinality of T.
That is, the ANSI standard recognizes it as bleeding obvious what you mean. COUNT(1) has been optimized out by RDBMS vendors because o...