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Unique BooleanField value in Django?
...if you've set the boolean to True, make sure all others are set to False.
from django.db import transaction
class Character(models.Model):
name = models.CharField(max_length=255)
is_the_chosen_one = models.BooleanField()
def save(self, *args, **kwargs):
if not self.is_the_chos...
Remove all whitespaces from NSString
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stringByTrimmingCharactersInSet only removes characters from the beginning and the end of the string, not the ones in the middle.
1) If you need to remove only a given character (say the space character) from your string, use:
[yourString stringByReplacingOccurrencesOfString:@" ...
How can I pass data from Flask to JavaScript in a template?
...es a call to an API that returns a dictionary. I want to pass information from this dict to JavaScript in the view. I am using the Google Maps API in the JS, specifically, so I'd like to pass it a list of tuples with the long/lat information. I know that render_template will pass these variables ...
How to log out user from web site using BASIC authentication?
Is it possible to log out user from a web site if he is using basic authentication?
22 Answers
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How to document thrown exceptions in c#/.net
...ing your code easier for callers.
To answer some of Andrew's concerns (from the comments), there are three types of exceptions: Ones you don't know about, ones you know about and can't do anything about, and ones you know about and can do something about.
The ones you don't know about you want...
Save An Image To Application Documents Folder From UIView On IOS
...esentation(image);
This pulls out PNG data of the image you've captured. From here, you can write it to a file:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
NSString...
npm not working after clearing cache
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"As of npm@5, the npm cache self-heals from corruption issues and data extracted from the cache is guaranteed to be valid. If you want to make sure everything is consistent, use
npm cache verify
instead."
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How to use NSJSONSerialization
I have a JSON string (from PHP's json_encode() that looks like this:
12 Answers
12
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How do I get the logfile from an Android device?
I would like to pull the log file from a device to my PC. How can I do that?
13 Answers
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What does HTTP/1.1 302 mean exactly?
Some article I read once said that it means jumping (from one URI to another), but I detected this "302" even when there was actually no jumping at all!
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