大约有 40,000 项符合查询结果（耗时：0.0429秒） [XML]
How to use custom packages
...something very obvious but I cannot find much information about this. Basically, I have these two files in the same folder:
...
mongodb group values by multiple fields
... $slice just off the basic aggregation result. For "large" results, run parallel queries instead for each grouping ( a demonstration listing is at the end of the answer ), or wait for SERVER-9377 to resolve, which would allow a "limit" to the number of items to $push to an array.
db.books.aggregate(...
How to customize the background/border colors of a grouped table view cell?
...later UITableViewCell now has a backgroundColor property that makes this really easy (especially in combination with the [UIColor colorWithPatternImage:] initializer). But I'll leave the 2.0 version of the answer here for anyone that needs it…
It's harder than it really should be. Here's how I ...
Can I have multiple Xcode versions installed?
Is it possible to have more than one version of Xcode installed at the same time?
12 Answers
...
How should the ViewModel close the form?
... window). You're welcome to make other tradeoffs, but it seems like a generally good deal to me.
– Joe White
May 6 '12 at 18:54
|
show 24 mo...
How do I count a JavaScript object's attributes? [duplicate]
...ry object in JavaScript derives from — includes many attributes automatically, and the exact set of attributes you get depends on the particular interpreter and what code has executed before yours. So, you somehow have to separate the ones you defined from those you got "for free."
Here's one way...
How to think in data stores instead of databases?
...
The datastore makes no distinction between inserts and updates. When you call put() on an entity, that entity gets stored to the datastore with its unique key, and anything that has that key gets overwritten. Basically, each entity kind in the datastore acts like an enormous map or sorted list.
Que...
How do you validate a URL with a regular expression in Python?
...he result of parsing gives you a netloc or path you don't like, you could call that "invalid".
– S.Lott
Jun 29 '09 at 20:44
2
...
Can I run multiple programs in a Docker container?
.... My application is simply a flask web application and mongo database. Normally I would install both in a VM and, forward a host port to the guest web app. I'd like to give Docker a try but I'm not sure how I'm meant to use more than one program. The documentations says there can only be only ENTRYP...
Resetting generator object in Python
I have a generator object returned by multiple yield. Preparation to call this generator is rather time-consuming operation. That is why I want to reuse the generator several times.
...