Recent Notes
Displaying keyword search results 1 - 10
Created by voodoo on February 16, 2012 14:57:35
Last update: February 16, 2012 14:57:35
You can use either declare or typeset to list function definitions :
To list all function names:
declare -F
To display a function definition:
$ declare -f quote
quote ()
{
echo ...
If you see a lot of functions with names starting with the underscore ( _ ) and wonder where they come from, they are created by the scripts in /etc/bash_completion.d/ .
Created by jinx on April 29, 2011 13:43:13
Last update: April 29, 2011 13:44:34
List of functions testing variable type:
Function Description
is_bool Finds out whether a variable is a boolean
is_double Alias of is_float()
is_float Finds whether the type of a variable is float
is_int Find whether the type of a variable is integer
is_integer Alias of is_int()
is_long Alias of is_int()
is_null Finds whether a variable is NULL
is_numeric Finds whether a variable is a number or a numeric string
is_object Finds whether a variable is an object
is_real Alias of is_float()
is_scalar Finds whether a variable is a scalar
is_string Find whether the type of a variable is string
Test code:
<?php
class A {
}
$a = ar...
Output:
var_dump: int(1)
-------------------------
i...
Created by Dr. Xi on April 18, 2011 12:10:37
Last update: April 18, 2011 12:14:24
Python defines a long list of special methods to customize class behavior. This is a short list for the Basic Customizations . Method Description object.__new__(cls[, ...]) Called to create a new instance of class cls. __new__() is a static method (special-cased so you need not declare it as such) that takes the class of which an instance was requested as its first argument. __new__() is intended mainly to allow subclasses of immutable types (like int, str, or tuple) to customize instance creation. It is also commonly overridden in custom metaclasses in order to customize class creation. object.__init__(self[,...]) Called when the instance is created. The arguments are those passed to the class constructor expression. If a base class has an __init__() method, the derived class’s __init__()...
Created by James on March 13, 2011 13:44:37
Last update: March 21, 2011 11:30:55
This is a jQuery input control that lets you enter any number of input rows of name and value pairs.
<!DOCTYPE html>
<html>
<head>
<title>jQu...
Created by James on October 11, 2010 19:01:28
Last update: January 11, 2011 20:38:56
Test page (click the "new window" icon to see the transition):
<!DOCTYPE html>
<html>
<head>
<title>jQu...
Created by James on July 06, 2010 15:27:28
Last update: January 11, 2011 20:20:03
This example shows three jQuery icons with hover effects.
<!DOCTYPE html>
<html>
<head>
<title>jQu...
Hint: mouseover an icon on the ThemeRoller page to get the CSS classname.
Created by Dr. Xi on October 26, 2010 04:47:37
Last update: January 11, 2011 20:00:36
The code presented here is a simple implementation of a tab set. It is used to demo how a tab set could be implemented. The code is stand alone and does not depend on any JavaScript libraries. Multiple tab sets within the same page is supported.
The HTML markup is fairly simple:
Tabs sets are contained within a DIV element with class name "tabsContainer".
Define a UL list for the tabs.
Follow the UL list with equal number of DIVs for the tab contents.
The Nifty Corners Cube technique is used to draw the rounded corners (original form, not the enhanced JavaScript form).
HTML, CSS and JavaScript:
<!doctype html>
<html>
<head>
<style typ...
Created by James on October 21, 2010 19:48:36
Last update: October 21, 2010 19:50:43
Use the in operator to enumerate over an object's properties:
Use the in operator to list all properties of an object
Call the hasOwnProperty function to determine if the property is a direct attribute of the current object, i.e., not some attribute defined somewhere up the prototype chain.
Test code (copy and paste to the JavaScript Executor ):
function BaseClass() {
this.p1 = 'parent.p1...
Note that intrinsic attributes such as constructor , prototype are not listed by the in operator.
Created by Dr. Xi on September 10, 2010 22:53:42
Last update: September 10, 2010 22:54:06
The sort operation for a Python list sorts a list in place . It takes three optional arguments to control the comparisons:
s.sort([cmp[, key[, reverse]]]) cmp specifies a custom comparison function of two arguments (list items) which should return a negative, zero or positive number depending on whether the first argument is considered smaller than, equal to, or larger than the second argument: cmp=lambda x,y: cmp(x.lower(), y.lower()) . The default value is None . key specifies a function of one argument that is used to extract a comparison key from each list element: key=str.lower . The default value is None . reverse is a boolean value. If set to True , then the list elements are sorted as if each comparison were reversed. Python 2.7 (r27:82525, Jul 4 2010, 09:01:59) [MSC...
Created by Dr. Xi on September 10, 2010 16:30:16
Last update: September 10, 2010 16:30:16
Perl uses the pop function to remove an item from the end of an array, and the shift function to remove an item from the beginning of an array. Python does not have a shift function, but its pop function takes a optional parameter. To remove an item from the beginning of a list , simply pop(0) .
>>> a = []
>>> a.append(1)
>>> a.append(2)
...
