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Set Django IntegerField by choices=… name
... seen here. Then you can use a word that represents the proper integer.
Like so:
LOW = 0
NORMAL = 1
HIGH = 2
STATUS_CHOICES = (
(LOW, 'Low'),
(NORMAL, 'Normal'),
(HIGH, 'High'),
)
Then they are still integers in the DB.
Usage would be thing.priority = Thing.NORMAL
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Printing HashMap In Java
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keySet() only returns a set of keys from your hashmap, you should iterate this key set and the get the value from the hashmap using these keys.
In your example, the type of the hashmap's key is TypeKey, but you specified Ty...
How to check if std::map contains a key without doing insert?
The only way I have found to check for duplicates is by inserting and checking the std::pair.second for false , but the problem is that this still inserts something if the key is unused, whereas what I want is a map.contains(key); function.
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What is “406-Not Acceptable Response” in HTTP?
... I POST the image I am getting a 406 Not Acceptable Response . When I checked my database, the image was there and was successfully saved.
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What is the fastest way to get the value of π?
I'm looking for the fastest way to obtain the value of π, as a personal challenge. More specifically, I'm using ways that don't involve using #define constants like M_PI , or hard-coding the number in.
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Using scanf() in C++ programs is faster than using cin?
I don't know if this is true, but when I was reading FAQ on one of the problem providing sites, I found something, that poke my attention:
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jQuery or javascript to find memory usage of page
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2015 Update
Back in 2012 this wasn't possible, if you wanted to support all major browsers in-use. Unfortunately, right now this is still a Chrome only feature (a non-standard extension of window.performance).
window.performance.memory
B...
Clearing NSUserDefaults
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You can remove the application's persistent domain like this:
NSString *appDomain = [[NSBundle mainBundle] bundleIdentifier];
[[NSUserDefaults standardUserDefaults] removePersistentDomainForName:appDomain];
In Swift 3 and later:
if let bundleID = Bundle.main.bundleIdentifie...
How to merge specific files from Git branches
... file.py from branch2 that is no longer applies to branch1, it requires picking some changes and leaving others. For full control do an interactive merge using the --patch switch:
$ git checkout --patch branch2 file.py
The interactive mode section in the man page for git-add(1) explains the keys ...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
What's a quick-and-dirty way to make sure that only one instance of a shell script is running at a given time?
40 Answers
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