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DatabaseError: current transaction is aborted, commands ignored until end of transaction block?
... I fixed it a similar way by python manage.py migrate <app>... for all my apps.
– Clayton
Feb 18 '12 at 4:11
3
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php - get numeric index of associative array
... to find the numeric position of a key.
I could loop through the array manually to find it, but is there a better way build into PHP?
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Is it Pythonic to use list comprehensions for just side effects?
Think about a function that I'm calling for its side effects, not return values (like printing to screen, updating GUI, printing to a file, etc.).
...
How does HashSet compare elements for equality?
...the IEqualityComparer<T>.GetHashCode to find the hash code, then for all elements with the same hash code, it will use IEqualityComparer<T>.Equals to compare for actual equality.
That means you have two options:
Pass a custom IEqualityComparer<T> into the constructor. This is th...
How to get child element by class name?
...amesPoulose, it wouldn't. Consider having an element set to two classes: small and bigger. thatElement.className would return a String that equals "small bigger". If you're looking for a class called big saying myElement.className.indexOf("big") will produce something unequal to negative 1 despite t...
mongo - couldn't connect to server 127.0.0.1:27017
...
Normally this caused because you didn't start mongod process before you try starting mongo shell.
Start mongod server
mongod
Open another terminal window
Start mongo shell
mongo
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How to open a second activity on click of button in android app
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but where? I get errors all over the place If i try place this withing the .java in eclipse
– Henry Aspden
Nov 2 '12 at 12:08
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How can I fill a div with an image while keeping it proportional?
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In IE9 the image is not centered vertically or horizontally with this method, it is aligned to the top and left. i59.tinypic.com/ouo77s.png
– Mike Kormendy
Oct 26 '14 at 20:05
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How to create .ipa file using Xcode?
...elow steps
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6 : Finally select the place you want to save the .ipa file
In Xcode Version 9.2
Go to Window -> Organizer
Then select your app archive from archives
Then click the "Upload to App Store" button on right panel
Then follow ...
Functional design patterns [closed]
... serialization
Specification-based testing
Parsers
Purely functional parallelism
Purely functional state
Part III: Functional design patterns
The case for abstraction
Monoids
Functors
Monads
Applicative functors
Traversable and foldable data structures
Comonads
Part IV: Breaking the...