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what exactly is device pixel ratio?
this is mentioned every article about mobile web, but nowhere I can found an explanation of what exactly does this attribute measure.
Can anyone please elaborate what does queries like this check?
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Hidden Features of Xcode
...re shortcuts (which you can do by drag-dropping) to files I am using right now. Generally this is more useful when I'm working with a large or unfamiliar project.
To show the Favorites Bar, select the following menu option:
View > Layout > Show Favorites Bar
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Should the hash code of null always be zero, in .NET
...m, either re-implement the hash code to return non-zero, add a default "unknown" enum entry equivalent to null, or simply don't use nullable enums.
Interesting find, by the way.
Another problem I see with this generally is that the hash code cannot represent a 4 byte or larger type that is nullabl...
Best way to compare dates in Android
... as java.util.Date, java.util.Calendar, and java.text.SimpleDateFormat are now legacy, supplanted by the java.time classes. Most of the java.time functionality is back-ported to Java 6 & Java 7 in the ThreeTen-Backport project. Further adapted for earlier Android (<26) in ThreeTenABP. See How...
When to use self over $this?
...I did get some more information that I found helpful further down, but for now I was just trying to figure out why I hit my class attributes with $this->attrib and the class constants with self::constant. This helped me understand that better
– MydKnight
Jul...
Using SQL Server 2008 and SQL Server 2005 and date time
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I voted this down by mistake, undid that, but now can't do what I really wanted to do which is vote it up! Thank you for finding the issue. If I understand correctly, does the value change from 2005 to 2008 due to updating the model from the database, where the database ...
Print in one line dynamically
...sh() forces a file to send whatever it's got to the operating system right now. I'm surprised it works for you without that -- it didn't work for me until I added it.
– zwol
Jul 15 '10 at 18:38
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How to avoid mysql 'Deadlock found when trying to get lock; try restarting transaction'
...each connection will wait for the other to release the key -> deadlock.
Now, if you changed your queries such that the connections would lock the keys at the same order, ie:
connection 1: locks key(1), locks key(2);
connection 2: locks key(1), locks key(2);
it will be impossible to get a deadlo...
jQuery Validate - require at least one field in a group to be filled
...revalidation problem (other fields in group still marked as invalid). But now I'm experiencing that the form submits even if invalid. If the grouped fields are valid then it does not enter the submithandler and if invalid it enters invalidHandler but submits anyway! I'd say this is a fairly serio...
Is there a splice method for strings?
...the two and a couple other methods. (jsperf has been down for a few months now. Please suggest alternatives in comments.)
Although the code above implements functions that reproduce the general functionality of splice, optimizing the code for the case presented by the asker (that is, adding nothing...