大约有 19,602 项符合查询结果（耗时：0.0388秒） [XML]
Polymorphism vs Overriding vs Overloading
...
The clearest way to express polymorphism is via an abstract base class (or interface)
public abstract class Human{
...
public abstract void goPee();
}
This class is abstract because the goPee() method is not definable for Humans. It is only definable for the subclasses Male ...
Javascript : natural sort of alphanumerical strings
...smartly recognize numbers. You can do case-insensitive using sensitivity: 'base'. Tested in Chrome, Firefox, and IE11.
Here's an example. It returns 1, meaning 10 goes after 2:
'10'.localeCompare('2', undefined, {numeric: true, sensitivity: 'base'})
For performance when sorting large numbers of ...
Why are hexadecimal numbers prefixed with 0x?
...identifier/reserved word). Something is still needed to specify the number base: the x is an arbitrary choice.
Long story: In the 60's, the prevalent programming number systems were decimal and octal — mainframes had 12, 24 or 36 bits per byte, which is nicely divisible by 3 = log2(8).
The BCPL ...
SQLAlchemy default DateTime
...lumn, Integer, DateTime
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
class Test(Base):
__tablename__ = 'test'
id = Column(Integer, primary_key=True)
created_date = Column(DateTime, default=datetime.datetime.utcnow)
...
Rails: How to get the model class name based on the controller class name?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
How to deal with IntelliJ IDEA project files under Git source control constantly changing?
...
You can use IDEA's directory-based project structure, where the settings are stored in .idea directory instead of .ipr file. It gives more fine-grained control over what is stored in version control. The .iml files will still be around, so it doesn't sol...
How to generate a random string in Ruby
...f2e81 (i.e. 32 chars of 0..9, a..f)
SecureRandom also has methods for:
base64
random_bytes
random_number
see: http://ruby-doc.org/stdlib-1.9.2/libdoc/securerandom/rdoc/SecureRandom.html
share
|
...
Difference between a Message Broker and an ESB
...he one area, other stronger in another. Perhaps a choice needs to be made based on which function best covers an individual problem.
A broker may have better built-in "lego blocks" for constructing a transformation chain than an ESB product does. A broker pressed into service as an ESB may be cru...
Sort an Array by keys based on another Array?
...er = array('north', 'east', 'south', 'west');
You can sort another array based on values using array_intersectDocs:
/* sort by value: */
$array = array('south', 'west', 'north');
$sorted = array_intersect($order, $array);
print_r($sorted);
Or in your case, to sort by keys, use array_intersect...
Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
...of manipulators from Andrew Koenig. The standard version of the library is based on this implementation.
Source "The Design & Evolution of C++", section 8.3.1.
share
|
improve this answer
...