大约有 19,000 项符合查询结果(耗时:0.0274秒) [XML]
Why all the Active Record hate? [closed]
...it's ugly, but for the cases where you just plain and simply need to write raw SQL, it's easily done.
@Tim Sullivan
...and you select several instances of the model, you're basically doing a "select * from ..."
Code:
people = Person.find(:all, :select=>'name, id')
This will only sel...
Convert .pem to .crt and .key
...ut argument, there are many different forms that this argument can take so consult the OpenSSL documentation about that.
openssl genrsa -out private.pem 1024
This creates a key file called private.pem that uses 1024 bits. This file actually have both the private and public keys, so you should extr...
How to use Comparator in Java to sort
...arable vs Comparator
Sorting an ArrayList of Contacts
Also, do not use raw types in new code. Raw types are unsafe, and it's provided only for compatibility.
That is, instead of this:
ArrayList peps = new ArrayList(); // BAD!!! No generic safety!
you should've used the typesafe generic decla...
When to use %r instead of %s in Python? [duplicate]
...
Use the %r for debugging, since it displays the "raw" data of the variable,
but the others are used for displaying to users.
That's how %r formatting works; it prints it the way you wrote it (or close to it). It's the "raw" format for debugging. Here \n used to display to...
Can the Android layout folder contain subfolders?
...
Is it possible to do this with the drawable folders? I just tried with no luck, even taking into account the declaration ordering.
– trevor-e
Mar 31 '14 at 21:22
...
How do I Geocode 20 addresses without receiving an OVER_QUERY_LIMIT response?
... that you have a lot less creation/modification of locations than you have consultations of locations.
Yes, it means you'll have to do a bit more work when saving the locations -- but it also means :
You'll be able to search by geographical coordinates
i.e. "I want a list of points that are ne...
Can I load a UIImage from a URL?
...one-4s-wallpapers-mobile-backgrounds-dark_2466f886de3472ef1fa968033f1da3e1_raw_1087fae1932cec8837695934b7eb1250_raw.jpg");
var err: NSError?
var imageData :NSData = NSData.dataWithContentsOfURL(url,options: NSDataReadingOptions.DataReadingMappedIfSafe, error: &err)
var bgImage = UIIm...
The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value
... this is one of the EF architectural issues.
– GSoft Consulting
Sep 13 '15 at 0:11
1
...
How to output MySQL query results in CSV format?
...at and escaping of
special characters. Escaping may be disabled by using raw mode; see
the description for the --raw option.
This will give you a tab separated file. Since commas (or strings containing comma) are not escaped it is not straightforward to change the delimiter to comma.
...
What's the purpose of SQL keyword “AS”?
...se, especially when there doesn't seem to be much to separate the choices, consult a book on heuristics. As far as I know, the only heuristics book for SQL is 'Joe Celko's SQL Programming Style':
A correlation name is more often
called an alias, but I will be formal.
In SQL-92, they can have...
