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Is there any difference between GROUP BY and DISTINCT
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MusiGenesis' response is functionally the correct one with regard to your question as stated; the SQL Server is smart enough to realize that if you are using "Group By" and not using any aggregate functions, then what you actually mean is "Distinct" - and therefore it generates a...
JavaScript before leaving the page
...nt to make a confirmation before user leaving the page. If he says ok then it would redirect to new page or cancel to leave. I tried to make it with onunload
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Bash script plugin for Eclipse? [closed]
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ShellEd looks promising, does syntax highlighting, and has positive reviews, although I've not tried it myself. It was approved for distro inclusion by Redhat. There's a little more info on the ShellEd plugin page on the Eclipse site, and installation instructions on their wiki.
Note t...
When should we use mutex and when should we use semaphore
... from a global linked list, you do not want another thread to muck around with pointers while you are deleting the node. When you acquire a mutex and are busy deleting a node, if another thread tries to acquire the same mutex, it will be put to sleep till you release the mutex.
Spinlock:
Use a spin...
Is there a Google Voice API? [closed]
...ly or unofficially) for Google Voice? I would like to have an API to work with voicemails, send/receive SMS messages, initiate calls, etc.
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Is it unnecessary to put super() in constructor?
Isn't this one automatically put by the compiler if I don't put it in a subclass's constructor?
6 Answers
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Looking to understand the iOS UIViewController lifecycle
...e appropriate times by iOS when you load/present/hide the view controller. It's important to note that these methods are attached to UIViewController and not to UIViews themselves. You won't get any of these features just using a UIView.
There's great documentation on Apple's site here. Putting in ...
Difference between object and class in Scala
...object O creates a singleton object O as instance of some anonymous class; it can be used to hold static members that are not associated with instances of some class.
object O extends T makes the object O an instance of trait T; you can then pass O anywhere, a T is expected.
if there is a class C, t...
Using backticks around field names
...ich has a policy which bans them, I'm wondering if there's anything wrong with using backticks around field names in MySQL.
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jQuery AJAX cross domain
...NP <-- P (lowercase)
success:function(json){
// do stuff with json (in this case an array)
alert("Success");
},
error:function(){
alert("Error");
}
});
PHP:
<?php
$arr = array("element1","element2",array("element31","element32"));
$arr['n...