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Django. Override save for model
...self._image_changed = True
# Or put whole logic in here
small = rescale_image(self.image,width=100,height=100)
self.image_small=SimpleUploadedFile(name,small_pic)
def get_image(self):
return self._image
image = property(get_image, set_image)
# this is ...
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
Is there a way to call a block with a primitive parameter after a delay, like using performSelector:withObject:afterDelay: but with an argument like int / double / float ?
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Why is “import *” bad?
...ed (readability).
Because you can't use cool tools like pyflakes to statically detect errors in your code.
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AngularJS : Factory and Service? [duplicate]
...ating between controllers like sharing data.
Can use other dependencies
Usually used when the service instance requires complex creation logic
Cannot be injected in .config() function.
Used for non configurable services
If you're using an object, you could use the factory provider.
Syntax: module...
How to manually expand a special variable (ex: ~ tilde) in bash
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Using eval is a horrible suggestion, it's really bad that it gets so many upvotes. You will run into all sorts of problems when the variable's value contains shell meta characters.
– user2719058
Aug 31 '14 at 19:47
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Why charset names are not constants?
... Or maybe "UTF-8" ? When searching internet for code samples you will see all of the above. Why not just make them named constants and use Charset.UTF8 ?
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How do I use .toLocaleTimeString() without displaying seconds?
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Here's the documentation of the allowed options (it's based on a separate constructor but the options map one-to-one): developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…
– Brian Peterson
Mar 11 at 18:42
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Delete a key from a MongoDB document using Mongoose
...de-mongodb-native driver. Each model has a collection object that contains all the methods that node-mongodb-native offers. So you can do the action in question by this:
User.collection.update({_id: user._id}, {$unset: {field: 1 }});
Since version 2.0 you can do:
User.update({_id: user._id}, {$u...
Import existing source code to GitHub
...me.git
If your local GIT repo is already set up, skips steps 2 and 3
Locally, at the root directory of your source, git init
2a. If you initialize the repo with a .gitignore and a README.md you should do a git pull {url from step 1} to ensure you don't commit files to source that you want to ign...
Load RSA public key from file
...provided.
Generate a 2048-bit RSA private key
$ openssl genrsa -out private_key.pem 2048
Convert private Key to PKCS#8 format (so Java can read it)
$ openssl pkcs8 -topk8 -inform PEM -outform DER -in private_key.pem -out private_key.der -nocrypt
Output public key portion in...