大约有 45,000 项符合查询结果（耗时：0.0464秒） [XML]
What Computer Science concepts should I know? [closed]
... etc). You should be able to produce sensible OO designs as well as understanding the concepts.
Scripting and regexes.
Data structures -- lists, sets, hashtables, trees, graphs, and so on -- as well as Big O notation and algorithmic complexity.
Bits, bytes and binary numbers -- how numbers are repre...
How do you pass multiple enum values in C#?
...ine the enum, just attribute it with [Flags], set values to powers of two, and it will work this way.
Nothing else changes, other than passing multiple values into a function.
For example:
[Flags]
enum DaysOfWeek
{
Sunday = 1,
Monday = 2,
Tuesday = 4,
Wednesday = 8,
Thursday = 16,
...
WWW or not WWW, what to choose as primary site name? [closed]
From technical perspective the only issue is traffic and incoming links (one of them should redirect to another).
14 Answe...
Why is the clone() method protected in java.lang.Object?
...ails to serve this purpose ... This is a highly atypical use of interfaces and not one to be emulated ... In order for implementing the interface to have any effect on a class, it and all of its superclasses must obey a fairly complex, unenforceable and largely undocumented protocol"
...
Why does 2 == [2] in JavaScript?
...alueOf().toString())
where valueOf() for arrays returns the array itself and the string-representation of a one-element array is the string representation of the single element.
This also explains the third example as [[[[[[[2]]]]]]].toString() is still just the string 2.
As you can see, there's...
Are fluid websites worth making anymore? [closed]
I'm making a website now and I am trying to decide if I should make it fluid or not. Fixed width websites are much easier to make and also much easier to make them appear consistent.
...
How to get the HTML for a DOM element in javascript
...
Expanding on jldupont's answer, you could create a wrapping element on the fly:
var target = document.getElementById('myElement');
var wrap = document.createElement('div');
wrap.appendChild(target.cloneNode(true));
alert(wrap.i...
Is short-circuiting logical operators mandated? And evaluation order?
Does the ANSI standard mandate the logical operators to be short-circuited, in either C or C++?
7 Answers
...
SQL to determine minimum sequential days of access?
...n user has accessed a website (in a 24 hour UTC period). It has many thousands of records, but only one record per day per user. If the user has not accessed the website for that day, no record will be generated.
...
Long list of if statements in Java
...
using Command pattern:
public interface Command {
void exec();
}
public class CommandA() implements Command {
void exec() {
// ...
}
}
// etc etc
then build a Map<String,Command> object and populat...