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Hidden features of Ruby
...an integer; "1001001100101100000001011010010".to_i(2), "499602d2".to_i(16) etc all return the original Fixnum.
– Huw Walters
Jun 24 '11 at 11:58
...
What is the best IDE to develop Android apps in? [closed]
...if we talk about eclipse you have to type each and every method, classname etc on your own. (May be eclipse has this feature too but i never found it and trust me i tried to find it like anything)
Its much more user friendly and easy to use than eclipse.
I hope it will help you and other members of ...
What are the most useful Intellij IDEA keyboard shortcuts? [closed]
...at calls this method, then the whole statement, then the containing block, etc.:
Ctrl+W
Basic Code Completion, to complete methods, keywords etc.:
Ctrl+Space
Go to Declaration. Use this to navigate to the declaration of a class, method or variable used somewhere in the code:
Ctrl+B
Introduce Vari...
Real World Example of the Strategy Pattern
...e would look the same:
File file = getFile();
Cipher c = CipherFactory.getCipher( file.size() );
c.performAction();
// implementations:
interface Cipher {
public void performAction();
}
class InMemoryCipherStrategy implements Cipher {
public void performAction() {
...
convert double to int
... Alternatively, you might want to use Math.Ceiling, Math.Round, Math.Floor etc - although you'll still need a cast afterwards.
Don't forget that the range of int is much smaller than the range of double. A cast from double to int won't throw an exception if the value is outside the range of int in ...
When should I make explicit use of the `this` pointer?
...one (and should be done) when overloading operator+, operator-, operator=, etc:
class Foo
{
Foo& operator=(const Foo& rhs)
{
return * this;
}
};
Doing this permits an idiom known as "method chaining", where you perform several operations on an object in one line of code. Such a...
How do I get an ISO 8601 date on iOS?
...ateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
[dateFormatter setCalendar:[NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian]];
NSDate *now = [NSDate date];
NSString *iso8601String = [dateFormatter stringFromDate:now];
And in Swift:
let dateFormatter = DateFormatter()
l...
Get The Current Domain Name With Javascript (Not the path, etc.)
...uestions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc
Then we can get the exact domain with following properties of location object:
location.host = "www.stackoverflow.com"
location.protocol= "http:"
you can make the full domain with:
location.protocol + "//" + locatio...
Why does Oracle 9i treat an empty string as NULL?
...answer exists but is not known by the user, data where there is no answer, etc. all of which constitute some sense of NULL).
By the time that the SQL standard came around and agreed that NULL and the empty string were distinct entities, there were already Oracle users that had code that assumed the...
How do arrays in C# partially implement IList?
... IStructuralComparable, IStructuralEquatable
{
// etc..
}
It implements System.Collections.IList, not System.Collections.Generic.IList<>. It can't, Array is not generic. Same goes for the generic IEnumerable<> and ICollection<> interfaces.
But the CLR ...