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What does PHP keyword 'var' do?
...er needed. It will work in PHP5, but will raise an E_STRICT warning in PHP from version 5.0.0 up to version 5.1.2, as of when it was deprecated. Since PHP 5.3, var has been un-deprecated and is a synonym for 'public'.
Example usage:
class foo {
var $x = 'y'; // or you can use public like...
...
Difference between Node object and Element object?
... type of node it is. You can see the various types of nodes here (diagram from MDN):
You can see an ELEMENT_NODE is one particular type of node where the nodeType property has a value of 1.
So document.getElementById("test") can only return one node and it's guaranteed to be an element (a speci...
What's the difference between “groups” and “captures” in .NET regular expressions?
...istory tracker. When the regex makes his match, it goes through the string from left to right (ignoring backtracking for a moment) and when it encounters a matching capturing parentheses, it will store that in $x (x being any digit), let's say $1.
Normal regex engines, when the capturing parenthes...
How to get the python.exe location programmatically? [duplicate]
...a handle of the python interpreter so I can pass a script file to execute (from an external application).
3 Answers
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Why would I prefer using vector to deque
...(Thus you can have a vector underneath or a regular array and call the API from your memory block).
Where deque has its biggest advantages are:
When growing or shrinking the collection from either end
When you are dealing with very large collection sizes.
When dealing with bools and you really wa...
How can I convert a std::string to int?
...
In C++11 there are some nice new convert functions from std::string to a number type.
So instead of
atoi( str.c_str() )
you can use
std::stoi( str )
where str is your number as std::string.
There are version for all flavours of numbers:
long stol(string), float stof(...
Why seal a class?
... create a class with a List<T> member variable, rather than deriving from List<T>. You'd then use the list to implement various methods.
– Jon Skeet
May 26 '09 at 20:23
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How can I have grep not print out 'No such file or directory' errors?
... to pass in -R or the path.
git grep pattern
That will show all matches from your current directory down.
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Difference between __getattr__ vs __getattribute__
...u can end up in infinite recursions very easily.
New-style classes derive from object, old-style classes are those in Python 2.x with no explicit base class. But the distinction between old-style and new-style classes is not the important one when choosing between __getattr__ and __getattribute__....
Define: What is a HashSet?
...anaging an array and storing the object using an index which is calculated from the hashcode of the object. Take a look here
HashSet is an unordered collection containing unique elements. It has the standard collection operations Add, Remove, Contains, but since it uses a hash-based implementation, ...