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When to use which design pattern? [closed]
...ve read a lot of websites where design patterns are explained. I do understand the most of them, but I find it difficult to recognize a pattern in my own situations.
...
How do I check if a Sql server string is null or empty
...ompany.Offer_Text) AS Offer_Text
FROM ...
is the most elegant solution.
And to break it down a bit in pseudo code:
// a) NULLIF:
if (listing.Offer_Text == '')
temp := null;
else
temp := listing.Offer_Text; // may now be null or non-null, but not ''
// b) ISNULL:
if (temp is null)
result :=...
Java synchronized method lock on object, or method?
...s, you have synchronize on them separately in synchronized () blocks. If a and b were object references you would use:
public void addA() {
synchronized( a ) {
a++;
}
}
public void addB() {
synchronized( b ) {
b++;
}
}
But since they're primitives you can't do thi...
How to configure Git post commit hook
... you can now do this more >easily by simply executing the following command:
curl http://yourserver/jenkins/git/notifyCommit?url=<URL of the Git repository>
This will scan all the jobs that’s configured to check out the specified URL, and if they are also configured with polling, i...
Determine what attributes were changed in Rails after_save callback?
...hanged? are only useful before the model is saved, the way I'm currently (and unsuccessfully) trying to do so is as follows:
...
Is it a good practice to place C++ definitions in header files?
...al style with C++ has always to put class declarations in an include file, and definitions in a .cpp file, very much like stipulated in Loki's answer to C++ Header Files, Code Separation . Admittedly, part of the reason I like this style probably has to do with all the years I spent coding Modula-2...
Injecting a mock into an AngularJS service
I have an AngularJS service written and I would like to unit test it.
7 Answers
7
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Why does comparing strings using either '==' or 'is' sometimes produce a different result?
...
@AlexanderSupertramp, because of string interning.
– Chris Rico
Feb 1 '15 at 9:34
...
“Private” (implementation) class in Python
...wered Feb 15 '09 at 15:34
Ferdinand BeyerFerdinand Beyer
55.1k1212 gold badges136136 silver badges138138 bronze badges
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Difference between ActionBarSherlock and ActionBar Compatibility
What is the difference between ActionBarSherlock and Action Bar Compatibility
7 Answers
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