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Why do we use arrays instead of other data structures?
...ans. A pointer is simply a variable that "points" to a location in memory. It doesn't contain the actual value at this area of memory, it contains the memory address to it. Think of a block of memory as a mailbox. The pointer would be the address to that mailbox.
In C, an array is simply a pointer ...
Why is inserting in the middle of a linked list O(1)?
...nserting in the middle of a linked list is considered O(1). I would think it would be O(n). Wouldn't you need to locate the node which could be near the end of the list?
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Is 23,148,855,308,184,500 a magic number, or sheer chance?
...20 2020 1250.
Do you see the pattern? The first six bytes have been overwritten by spaces (hex 20, dec 32).
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edited Sep 7 '10 at 6:08
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Is there an equivalent for var_dump (PHP) in Javascript?
...ld be portable across those browsers. For other browsers, there's Firebug Lite.
If Firebug isn't an option for you, then try this simple script:
function dump(obj) {
var out = '';
for (var i in obj) {
out += i + ": " + obj[i] + "\n";
}
alert(out);
// or, if you wanted...
Skip List vs. Binary Search Tree
I recently came across the data structure known as a skip list . It seems to have very similar behavior to a binary search tree.
...
How do you run a Python script as a service in Windows?
I am sketching the architecture for a set of programs that share various interrelated objects stored in a database. I want one of the programs to act as a service which provides a higher level interface for operations on these objects, and the other programs to access the objects through that servic...
How to disable HTML button using JavaScript?
...ke physically unclickable) an HTML button simply by appending disable to its tag, but not as an attribute, as follows:
9 ...
How to terminate a Python script
I am aware of the die() command in PHP which exits a script early.
10 Answers
10
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TypeError: 'module' object is not callable
...t;class 'socket._socketobject'>
This is what the error message means:
It says module object is not callable, because your code is calling a module object. A module object is the type of thing you get when you import a module. What you were trying to do is to call a class object within the modul...
403 Forbidden vs 401 Unauthorized HTTP responses
...
A clear explanation from Daniel Irvine:
There's a problem with 401 Unauthorized, the HTTP status code for authentication errors. And that’s just it: it’s for authentication, not authorization.
Receiving a 401 response is the server telling you, “you aren’t
authenticated...