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What does %~dp0 mean, and how does it work?
... search, then this modifier expands to the
empty string
The modifiers can be combined to get
compound results:
%~dpI - expands %I to a drive letter and path only
%~nxI - expands %I to a file name and extension only
%~fsI - expands %I to a full pat...
Double not (!!) operator in PHP
....
This means that for any true value (numbers other than zero, non-empty strings and arrays, etc.) you will get the boolean value TRUE, and for any false value (0, 0.0, NULL, empty strings or empty arrays) you will get the boolean value FALSE.
It is functionally equivalent to a cast to boolean:
...
How to load JAR files dynamically at Runtime?
...RL.class};
/**
* Adds a file to the classpath.
* @param s a String pointing to the file
* @throws IOException
*/
public static void addFile(String s) throws IOException {
File f = new File(s);
addFile(f);
}
/**
* Adds a file to the classpath...
Is XSLT worth it? [closed]
... DOMs, in the same way that regular expressions can be a nice way to query strings.
Functional language.
Disadvantages of XSLT:
Can be obscenely verbose - you don't have to quote literal XML, which effectively means you do have to quote code. And not in a pretty way. But then again, it's not muc...
Java 8 functional interface with no arguments and no return value
....run();
};
}
}
and use it like this
public static void main(String[] args){
Procedure procedure1 = () -> System.out.print("Hello");
Procedure procedure2 = () -> System.out.print("World");
procedure1.andThen(procedure2).run();
System.out.println();
procedure1...
How to deserialize a JObject to .NET object
...r Person should be compatible to the following:
class Person {
public string Name { get; internal set; }
public DateTime BirthDate { get; internal set; }
}
Edit
If you are using a recent version of JSON.net and don't need custom serialization, please see TienDo's answer above (or below i...
How to add column if not exists on PostgreSQL?
...t pass these as parameters, you'll need to do variable substitution in the string on the client side, but this is a self contained query that only emits a message if the column already exists, adds if it doesn't and will continue to fail on other errors (like an invalid data type).
I don't recommend...
NameError: global name 'unicode' is not defined - in Python 3
...brary to support both Python 2 and 3:
import six
if isinstance(value, six.string_types):
handle_string(value)
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How to handle button clicks using the XML onClick within Fragments
...ayoutInflater.class.getDeclaredMethod(
"onCreateView", String.class, AttributeSet.class);
method.setAccessible(true);
sOnCreateViewMethod = method;
} catch (NoSuchMethodException e) {
// Public API: Should not happen.
throw ...
Rails: fields_for with index?
...:namespace] = options[:namespace]
case record_name
when String, Symbol
if nested_attributes_association?(record_name)
return fields_for_with_nested_attributes(record_name, record_object, fields_options, block)
end
else
re...