how does this work?
in irb:
>> class A
>> b = [1, 2,3]
>> end
=> [1, 2, 3]
Is b an instance variable? class variable? how would I access b from
outside the class? Is it used for meta-programming?
Hi
I'm doing programming with ASP.NET . I have no idea how to use JavaScript in ASP.NET Server Side controls ( Totally uncomfortable with it ) . Do you mind introduce me some resource for folks like my type , please ?
This may not be directly related to programming, but I always find it hard to get quality icons that can be used for software.
I currently have the need for some type of "green checkmark image", and I always seem to be looking for print, save, delete types of icons...
Anybody have good resources?
Note: I rather not be stealing someone's intellectual property.
I would like to clip an image with path. In the book Programming with Quartz there is an example on how to draw a circle clipped by a rectangular path (p.37), and there is also a chapter on image masking with existing image as stencil (Ch.10). But I'm still not sure about how to clip an existing image using path. Is there any example or pointer?
This question might not be a programming problem, but its been bothering me. There is a lot of free js/css scripts out there for public use. I some times use these scripts. If any, what is the formal and proper way to credit these snippets when all i have is a name of a website and a url.
I understand that a simple comment might get the job done but i wanted to know whether there is a more professional way.
I'm working with a source base written almost entirely in straight-c (nginx). It does, however, make use of rich high level programming techniques such as compile-time metaprogramming, and OOP - including run-time dispatch.
I want to draw ER diagrams, UML class diagrams and UML sequence diagrams. However to have a clean mapping between the two, consistent conventions must be applied. So, I am hopping someone has some references to material that establishes or applies such conventions to similar style c-code.
This isn't really a programming question but... Is there any way to draw online a lattice for a material, like a compound? i.e. a 3D gridlike pattern? I know there are some applications for drawing mathematical lattices, but the notation to me is unfamiliar - are there simply programs or applets or something for drawing lattices like in a compound?
hello I'm new to PHP programming and I migrated from ASP .net to PHP..
I have a div just like below
<div id="mydiv"></div>
what I wanted to do is just to change the text and html content(like some name or any data in it) in it.
What I imagine is just like
mydiv=innertext="some value";
Thanks,
GURU
Im trying to make a program that captures a video from the webcam and sound from the microphone but im getting stuck at the part where ive try to make a movie out of still images
ive heard you need to use directshow but it doesnt jet work for me
Does someone know a good piece of example code that captures video and sound and can encode it to a file (divx or something like that) ?
or some suggestions where to look so i can build it myself
(if a other programming language is better for this im happy to know it early. )
Is this considered good programming practise in C++:
try {
// some code
}
catch(someException) {
// do something
}
catch (...)
{
// left empty <-- Good Practise???
}
Hello everybody!
I've been wondering whether is possible or not to pass a function as parameter in PHP; I want something like when you're programming in JS:
object.exampleMethod(function(){
// some stuff to execute
});
What I want is to execute that function somewhere in exampleMethod. Is that possible in PHP?
Thank you so much.
We are programming a new web application framework (Second WAF). I was wondering if we should support cookieless sessions or not.
Who use it and who needs it?
Hi, I am learning the Opengl graphic programming at Eclipse. Can someone tell me the difference between GLUT application and SDL application, so that I can dig into either one of them? Tks.
Whatever it be, caffeine, tobacco, whatever, list your programming performance enhancing drug of choice.
Do you feel like you NEED it to be most effective at your work?
Vote up someone if they answered the same as you.
A friend of mine, who studies game development at an university, is currently learning programming in OpenCL. What would be a simple project that teaches the most important aspects of OpenCL and can be finished within about 50 - 100 hours?
I need to programatically encrypt a directory of files, like in a .zip or whatever. Preferably password protected obviously.
How can I accomplish this, and WHAT IS the BEST encryption way to do it, if applicable?
Programming language doesn't matter. I am dictioned in all syntax.
"8,5,,1,4,7,,,,7,,1,9,3,6,,,8,6,3,9,,2,5,4,,,,,3,2,,,7,4,1,1,,4,,6,9,,5,,,,5,,,1,,6,3,,,6,5,,,,7,4,,1,7,6,,,,8,,5,,,7,1,,3,9,"
I'm doing a programming challenge where i need to parse this sequence into my sudoku script.
Need to get the above sequence into 8,5,0,1,4,7,0,0,0,7,0,1,9,3,6,0,0,8.........
I tried re but without success, help is appreciated, thanks.
Hello,
I'm new to PHP programming and I wanted to know that is it possible to handle PHP events as we do in ASP.NET
I mean I've got a img and I want to perform some task on click event of this img.
I know how to do it in ASP.NET but please help me in context of PHP
Thanks,
GURU
For those of you who are into programming not just for the money. I would like to know which benefits you would like to have (or already have).
OK, maybe taking away the money factor will limit this question too much. I am surprised to see that most companies have a fixed set for their benefits package. Were you able to negotiate something new or just your salary? What things have you seen out there and/or value most?
Hello everyone,
I'm using the rails-settings gem, and I'm trying to understand how you add functions to ActiveRecord classes (I'm building my own library for card games), and I noticed that this gem uses one of the Meta-programming techniques to add the function to the ActiveRecord::Base class (I'm far from Meta-programming master in ruby, but I'm trying to learn it)
module RailsSettings
class Railtie < Rails::Railtie
initializer 'rails_settings.initialize', :after => :after_initialize do
Railtie.extend_active_record
end
end
class Railtie
def self.extend_active_record
ActiveRecord::Base.class_eval do
def self.has_settings
class_eval do
def settings
RailsSettings::ScopedSettings.for_thing(self)
end
scope :with_settings, :joins => "JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND
settings.thing_type = '#{self.base_class.name}')",
:select => "DISTINCT #{self.table_name}.*"
scope :with_settings_for, lambda { |var| { :joins => "JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND
settings.thing_type = '#{self.base_class.name}') AND
settings.var = '#{var}'" } }
scope :without_settings, :joins => "LEFT JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND
settings.thing_type = '#{self.base_class.name}')",
:conditions => 'settings.id IS NULL'
scope :without_settings_for, lambda { |var| { :joins => "LEFT JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND
settings.thing_type = '#{self.base_class.name}') AND
settings.var = '#{var}'",
:conditions => 'settings.id IS NULL' } }
end
end
end
end
end
end
What I don't understand is why he uses class_eval on ActiveRecord::Base, wasn't it easier if he just open the ActiveRecord::Base class and define the functions? Specially that there's nothing dynamic in the block (What I mean by dynamic is when you do class_eval or instance_eval on a string containing variables)
something like this:
module ActiveRecord
class Base
def self.has_settings
class_eval do
def settings
RailsSettings::ScopedSettings.for_thing(self)
end
scope :with_settings, :joins => "JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND
settings.thing_type = '#{self.base_class.name}')",
:select => "DISTINCT #{self.table_name}.*"
scope :with_settings_for, lambda { |var| { :joins => "JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND
settings.thing_type = '#{self.base_class.name}') AND
settings.var = '#{var}'" } }
scope :without_settings, :joins => "LEFT JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND
settings.thing_type = '#{self.base_class.name}')",
:conditions => 'settings.id IS NULL'
scope :without_settings_for, lambda { |var| { :joins => "LEFT JOIN settings ON (settings.thing_id = #{self.table_name}.#{self.primary_key} AND
settings.thing_type = '#{self.base_class.name}') AND
settings.var = '#{var}'",
:conditions => 'settings.id IS NULL' } }
end
end
end
end
I understand the second class_eval (before the def settings) is to define functions on the fly on every class that 'has_settings' right ? Same question here, I think he could use "def self.settings" instead of "class_eval.... def settings", no ?
This isn't a question about code, but it's programming related. We have a web app that's ready for beta testing. Has anyone noticed any difference between open beta vs. closed beta in terms of the quality or quantity of feedback the testers give or any other factors?
Hello people,
I have three images,and , they are not square or rectangular in shape. They are just like face of anyone.
So,basically, my images are in the size 196x196 or anything like that, but complete square or rectangle with the face in the middle and transperant background in the rest of the portion.
Now, I want to remove the transperant background too and just keep the faces.
Don't know if this is possible and mind you, this isn't a programming question.
hello
i never worked with web programming and
i've been asked lately to write a web-based software to manage assets and tasks. to be used by more than 900 persons
what are the recommended modules , frameworks , libraries for this task.
and it will be highly appreciated if you guyz recommend some books and articles that might help me. thanks in advance
Hi,
Is it possible to do Aspect Oriented Programming in Delphi? I would be interested in native support as well as third party solutions.
I don't have a specific problem I want to solve with AOP, but am simply interested in studying AOP.
Thanks, Miel Bronneberg.
I'm trying to find out what a binormal is in the context of graphics programming but coming up short, I saw on a site that the binormal was being calculated as the corss between the normal and tangent (i.e. cross(normal, tangent)), is this the correct way to calculate a binormal?