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Dynamically adding a form to a Django formset with Ajax
...ly add new forms to a Django formset using Ajax, so that when the user clicks an "add" button it runs JavaScript that adds a new form (which is part of the formset) to the page.
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How to hide Soft Keyboard when activity starts
...ext with android:windowSoftInputMode="stateVisible" in Manifest. Now the keyboard will be shown when I start the activity. How to hide it? I cannot use android:windowSoftInputMode="stateHidden because when keyboard is visible then minimize the app and resume it the keyboard should be visible.
I...
What's the equivalent of Java's Thread.sleep() in Objective-C/Cocoa?
...cution for an amount of time using Thread.sleep() . Is there something like this in Objective-C?
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What is the fastest way to compute sin and cos together?
I would like to compute both the sine and co-sine of a value together (for example to create a rotation matrix). Of course I could compute them separately one after another like a = cos(x); b = sin(x); , but I wonder if there is a faster way when needing both values.
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Foreign key constraint may cause cycles or multiple cascade paths?
...Server does simple counting of cascade paths and, rather than trying to work out whether any cycles actually exist, it assumes the worst and refuses to create the referential actions (CASCADE): you can and should still create the constraints without the referential actions. If you can't alter your d...
How to sort an array of objects with jquery or javascript [duplicate]
... answered Mar 31 '11 at 17:38
KetanKetan
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Algorithm for creating a school timetable
I've been wondering if there are known solutions for algorithm of creating a school timetable. Basically, it's about optimizing "hour-dispersion" (both in teachers and classes case) for given class-subject-teacher associations. We can assume that we have sets of classes, lesson subjects and teacher...
emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
...al, it is used in the printed representation along with the left angle bracket (<) to indicate that the object printed is a description (but cannot be read). For example:
#<buffer foo.txt>
It is also used in constructs by the reader to represent circular structures. See the docs for Re...
Can I force a UITableView to hide the separator between empty cells? [duplicate]
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Daniel HepperDaniel Hepper
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Where do “pure virtual function call” crashes come from?
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They can result if you try to make a virtual function call from a constructor or destructor. Since you can't make a virtual function call from a constructor or destructor (the derived class object hasn't been constructed or has already been destroyed), it ...