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How to select the first element with a specific attribute using XPath
... books from 'US'. (/bookstore/book[@location='US'])[1] will get the first one.
– Kevin Driedger
Apr 17 '12 at 19:39
3
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How do I format a long integer as a string without separator in Java?
...this with MessageFormat properties injection. Good thing there's more than one way to do it!
– Philihp Busby
Oct 20 '11 at 2:27
3
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Check if OneToOneField is None in Django
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To check if the (OneToOne) relation exists or not, you can use the hasattr function:
if hasattr(request.user, 'type1profile'):
# do something
elif hasattr(request.user, 'type2profile'):
# do something else
else:
# do something el...
Thread context switch Vs. process context switch
Could any one tell me what is exactly done in both situations? What is the main cost each of them?
10 Answers
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Volatile vs. Interlocked vs. lock
...e access modifier of counter to public volatile
As other people have mentioned, this on its own isn't actually safe at all. The point of volatile is that multiple threads running on multiple CPUs can and will cache data and re-order instructions.
If it is not volatile, and CPU A increments a value,...
Custom HTTP headers : naming conventions
... name with "X-". E.g. X-Forwarded-For, X-Requested-With. This is also mentioned in a.o. section 5 of RFC 2047.
Update 1: On June 2011, the first IETF draft was posted to deprecate the recommendation of using the "X-" prefix for non-standard headers. The reason is that when non-standard headers pr...
PHP YAML Parsers [closed]
Does anyone know of a good YAML Parser for PHP? If so, what are the pros and cons of this library?
8 Answers
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How to determine whether an object has a given property in JavaScript
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Does anyone need to distinguish between "not defined" and "defined to be undefined?"
– jpsimons
Dec 12 '09 at 22:25
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Generic deep diff between two objects
...object in arbitrary way based on passed primitive values (now this job is done by "compareValues" method).
var deepDiffMapper = function () {
return {
VALUE_CREATED: 'created',
VALUE_UPDATED: 'updated',
VALUE_DELETED: 'deleted',
VALUE_UNCHANGED: 'unchanged',
map: function(o...
jQuery pitfalls to avoid [closed]
... pointing this out JP. Now, what to do... Should I delete my answer so no one else goes hog wild and changes their code for nothing?
– slolife
Aug 14 '09 at 16:47
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