大约有 40,070 项符合查询结果（耗时：0.0521秒） [XML]
How to get last items of a list in Python?
...
545
You can use negative integers with the slicing operator for that. Here's an example using the p...
Rails where condition using NOT NIL
...h Rails 3:
Foo.includes(:bar).where("bars.id IS NOT NULL")
ActiveRecord 4.0 and above adds where.not so you can do this:
Foo.includes(:bar).where.not('bars.id' => nil)
Foo.includes(:bar).where.not(bars: { id: nil })
When working with scopes between tables, I prefer to leverage merge so that...
XML Serialization - Disable rendering root element of array
... |
edited Jul 6 '16 at 10:45
answered Jan 5 '10 at 14:27
Ru...
Plotting time in Python with Matplotlib
...
4 Answers
4
Active
...
What is mattr_accessor in a Rails module?
...
phil pirozhkov
4,16411 gold badge2525 silver badges3737 bronze badges
answered Oct 9 '08 at 1:49
AvdiAvdi
...
why does DateTime.ToString(“dd/MM/yyyy”) give me dd-MM-yyyy?
...
246
Slash is a date delimiter, so that will use the current culture date delimiter.
If you want to...
HintPath vs ReferencePath in Visual Studio
...
4 Answers
4
Active
...
Set default syntax to different filetype in Sublime Text 2
...
4 Answers
4
Active
...
Memory footprint of Haskell data types
... instance of these constructors and shares it amongst all uses.
A word is 4 bytes on a 32-bit machine, and 8 bytes on a 64-bit machine.
So e.g.
data Uno = Uno a
data Due = Due a b
an Uno takes 2 words, and a Due takes 3.
The Int type is defined as
data Int = I# Int#
now, Int# takes one wor...
RVM is not working in ZSH
...
answered Jan 21 '11 at 5:24
intellidiotintellidiot
10.3k44 gold badges3030 silver badges4141 bronze badges
...