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How to rename items in values() in Django?
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From django>=1.8 you can use annotate and F object
from django.db.models import F
MyModel.objects.annotate(renamed_value=F('cryptic_value_name')).values('renamed_value')
Also extra() is going to be deprecated, from the django docs:
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How do I check the difference, in seconds, between two dates?
...30,23,59,59)
b = dt.datetime(2013,12,31,23,59,59)
(b-a).total_seconds()
86400.0
#note that seconds doesn't give you what you want:
(b-a).seconds
0
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How do I find the time difference between two datetime objects in python?
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388
>>> import datetime
>>> first_time = datetime.datetime.now()
>>> lat...
Rails migration: t.references with alternative name?
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168
You can do this all in the initial migration/column definition (at least currently in Rails 5):
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What is the difference between background and background-color
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edited Jun 30 at 8:05
answered Apr 18 '12 at 8:18
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IntelliJ IDEA jump from interface to implementing class in Java
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Jan de Vos
3,38211 gold badge1818 silver badges1616 bronze badges
answered Feb 19 '11 at 16:19
limclimc
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How to easily truncate an array with JavaScript?
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186
There is a slice method
array.slice(0, 4);
Will return the first four elements.
Don't forg...
Set 4 Space Indent in Emacs in Text Mode
I've been unsuccessful in getting Emacs to switch from 8 space tabs to 4 space tabs when pressing the TAB in buffers with the major mode text-mode . I've added the following to my .emacs :
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super() in Java
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answered Sep 22 '10 at 8:09
pakorepakore
10.5k1010 gold badges3939 silver badges6262 bronze badges
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Placeholder in IE9
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185
HTML5 Placeholder jQuery Plugin
- by Mathias Bynens (a collaborator on HTML5 Boilerplate and js...