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How do I calculate square root in Python?
...ve to write: sqrt = x**(1/2.0), otherwise an integer division is performed and the expression 1/2 returns 0.
This behavior is "normal" in Python 2.x, whereas in Python 3.x 1/2 evaluates to 0.5. If you want your Python 2.x code to behave like 3.x w.r.t. division write from __future__ import division...
Django REST framework: non-model serializer
I am beginner in Django REST framework and need your advice. I am developing a web service. The service has to provide REST interface to other services. The REST interface, which I need to implement, is not working with my models directly (I mean the get, put, post, delete operations). Instead, it p...
Python CSV error: line contains NULL byte
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print repr(open('my.csv', 'rb').read(200)) # dump 1st 200 bytes of file
and carefully copy/paste (don't retype) the result into an edit of your question (not into a comment).
Also note that if the file is really dodgy e.g. no \r or \n within reasonable distance from the start of the file, the li...
How to add leading zeros for for-loop in shell? [duplicate]
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Best answer, and it avoids using clumsy external commands (like 'seq', not necessary in proper Bash). Helped me.
– Scott Prive
Jan 28 '15 at 20:31
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How to add a touch event to a UIView?
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In iOS 3.2 and higher, you can use gesture recognizers. For example, this is how you would handle a tap event:
//The setup code (in viewDidLoad in your view controller)
UITapGestureRecognizer *singleFingerTap =
[[UITapGestureRecogni...
Is there a 'foreach' function in Python 3?
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It's not map(), because map() accumulates and returns a list, while foreach() doesn't. The difference could be quite expensive if you're iterating over a long list of items. Agreed that for() does the trick.
– Canuck
Apr 8 '15 ...
How to get current date in jquery?
...atted like yyyy/mm/dd - is that used in some country? I've seen yyyy-mm-dd and yyyymmdd
– Manachi
Sep 27 '14 at 17:31
1
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How do you run multiple programs in parallel from a bash script?
...t prog1.
Send it to background, but keep printing its output.
Start prog2, and keep it in foreground, so you can close it with ctrl-c.
When you close prog2, you'll return to prog1's foreground, so you can also close it with ctrl-c.
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ViewPager.setOffscreenPageLimit(0) doesn't work as expected
...them, with the animated effect showing the old view sliding off the screen and the new view sliding onto the screen. You are welcome to try to write your own ViewPager that can swipe between things that do not exist. You can read more about this at code.google.com/p/android/issues/detail?id=56667#c3...
Adding iOS UITableView HeaderView (not section header)
...view you want up there.
Use a new UIView as a container, add a text label and an image view to that new UIView, then set tableHeaderView to the new view.
For example, in a UITableViewController:
-(void)viewDidLoad
{
// ...
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(XX...