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Understanding dispatch_async
...e background.
For instance, if I am downloading a file from the internet and I want to update the user on the progress of the download, I will run the download in the priority default queue and update the UI in the main queue asynchronously.
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEU...
How to find duplicates in 2 columns not 1
...composite key between the two fields. This will require a unique stone_id and upcharge_title for each row.
As far as finding the existing duplicates try this:
select stone_id,
upcharge_title,
count(*)
from your_table
group by stone_id,
upcharge_title
having coun...
How to make a floated div 100% height of its parent?
...
For #outer height to be based on its content, and have #inner base its height on that, make both elements absolutely positioned.
More details can be found in the spec for the css height property, but essentially, #inner must ignore #outer height if #outer's height is a...
How to remove element from an array in JavaScript?
...
And the follow-on question: arr.splice(1,1) for the second element.
– slebetman
Jan 5 '10 at 2:42
1
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How are Anonymous inner classes used in Java?
...ut actually making a separate class.
I only use this technique for "quick and dirty" tasks where making an entire class feels unnecessary. Having multiple anonymous inner classes that do exactly the same thing should be refactored to an actual class, be it an inner class or a separate class.
...
What is the difference between allprojects and subprojects
...e tell me what exactly is the difference between the "allprojects" section and the "subprojects" one? Just the parent directory? Does anyone use both? If so, do you have general rules that determines what typically is put in each one?
...
Is there a way to use shell_exec without waiting for the command to complete?
...; /dev/null 2>/dev/null &');
Note this also gets rid of the stdio and stderr.
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ContractFilter mismatch at the EndpointDispatcher exception
...ssage.
This can be because:
You have different contracts between client and sender.
You're using a different binding between client and sender.
The message security settings are not consistent between client and sender.
Have at look at the EndpointDispatcher class for more information on the su...
How can I calculate the difference between two dates?
How can I calculate the days between 1 Jan 2010 and (for example) 3 Feb 2010?
9 Answers
...
Weird Integer boxing in Java
... in the range
\u0000 to \u007f, or an int or short
number between -128 and 127, then let
r1 and r2 be the results of any two
boxing conversions of p. It is always
the case that r1 == r2.
The discussion goes on, suggesting that although your second line of output is guaranteed, the first ...