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Referencing another schema in Mongoose
...small change to your post schema:
var postSchema = new Schema({
name: String,
postedBy: {type: mongoose.Schema.Types.ObjectId, ref: 'User'},
dateCreated: Date,
comments: [{body:"string", by: mongoose.Schema.Types.ObjectId}],
});
Then make your model:
var Post = mongoose.model('Po...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
... problems if the compiler had to "arrange for another behaviour" (e.g. use extra instructions to check for potential overflow and calculate differently in that case).
It is also worth noting that "undefined behaviour" doesn't mean "doesn't work". It means that the implementation is allowed to do w...
git rebase without changing commit timestamps
... one of the core members applies the patch, both of you get credit.
To be extra clear, in this instance, as Olivier comments:
the --ignore-date does the opposite of what I was trying to achieve!
Namely, it erases the author's timestamp and replace them with the commits timestamps!
So the right an...
How do I detect whether a Python variable is a function?
...into this by removing the __call__ from the
class. And just to keep things extra exciting, add a fake __call__ to the instance!
>>> del Spam.__call__
>>> can_o_spam.__call__ = lambda *args: 'OK?'
Notice this really isn't callable:
>>> can_o_spam()
Traceback (most recen...
Is there any way to git checkout previous branch?
...ing equivalent (get reflog and filter it to lines containing ": checkout:" string and then extract branch name). This is actually what git does
– Mariusz Pawelski
Nov 4 '18 at 0:46
...
Android screen size HDPI, LDPI, MDPI [duplicate]
... your emulator. 240 is hdpi, 160 is mdpi and below that are usually ldpi.
Extract from Android Developer Guide link above:
320dp: a typical phone screen (240x320 ldpi, 320x480 mdpi, 480x800 hdpi, etc).
480dp: a tweener tablet like the Streak (480x800 mdpi).
600dp: a 7” tablet (600x1024 mdpi)...
Python memory leaks [closed]
...bably give you some more hints too. You should also take a look on all the extra helpers provided by pyrasite (such as the memory viewer).
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Dashed line border around UIView
...lding upon what Prasad G has suggested I created a method inside a UIImage Extras class with the following:
- (CAShapeLayer *) addDashedBorderWithColor: (CGColorRef) color {
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
CGSize frameSize = self.size;
CGRect shapeRect = CGRectMake(0....
Git: How to remove file from historical commit?
...
You can use git-extras tool. The obliterate command completely remove a file from the repository, including past commits and tags.
https://github.com/tj/git-extras/blob/master/Commands.md
...
.NET XML serialization gotchas? [closed]
...
When serializing into an XML string from a memory stream, be sure to use MemoryStream#ToArray() instead of MemoryStream#GetBuffer() or you will end up with junk characters that won't deserialize properly (because of the extra buffer allocated).
http://m...