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Why do we need Abstract factory design pattern?
...ion of Abstract Factory has been accepted as the solution.
To the best of my understanding, these questions represent real concerns or problems that people had, so that should get you started with some real-life examples:
Is there a pattern for initializing objects created via a DI container
Can'...
Set the table column width constant regardless of the amount of text in its cells?
In my table I set the width of the first cell in a column to be 100px .
However, when the text in one of the cell in this column is too long, the width of the column becomes more than 100px . How could I disable this expansion?
...
Primary key/foreign Key naming convention [closed]
...ommon sense... There are more important things to argue about.. So, do it my way (choice 2)
– Charles Bretana
Sep 2 '09 at 19:28
5
...
O(nlogn) Algorithm - Find three evenly spaced ones within binary string
...
Sorry got my calculation completely wrong. It should be 110110010^2=12124214302200100. But the idea stands. Just note the position of the 3.
– Guillermo Phillips
Oct 19 '09 at 18:28
...
How can I call controller/view helper methods from the console in Ruby on Rails?
...foo.public_methods(true||false).sort
foo.some_method
Route Helpers:
app.myresource_path # => "/myresource"
app.myresource_url # => "http://www.example.com/myresource"
View Helpers:
foo = ActionView::Base.new
foo.javascript_include_tag 'myscript' #=> "<script src=\"/javasc...
What does “|=” mean? (pipe equal operator)
...1<<2 or 100 in binary
So you can use bit-wise OR to add flags
int myFlags = DEFAULT_SOUND | DEFAULT_VIBRATE; // same as 001 | 010, producing 011
so
myFlags |= DEFAULT_LIGHTS;
simply means we add a flag.
And symmetrically, we test a flag is set using & :
boolean hasVibrate = (DEFA...
Is there a better way to do optional function parameters in JavaScript? [duplicate]
...can declare default argument values in the function declaration:
function myFunc(requiredArg, optionalArg = 'defaultValue') {
// do stuff
}
More about them in this article on MDN.
This is currently only supported by Firefox, but as the standard has been completed, expect support to improve r...
puts vs logger in rails rake tasks
... a real problem... I am running like 8 consoles tracing what's going on in my app, just switch between tabs when you're working on a specific part of the system no big deal imho
– marcgg
Feb 11 '10 at 17:19
...
Python memoising/deferred lookup property decorator
...
I wrote this one for myself... To be used for true one-time calculated lazy properties. I like it because it avoids sticking extra attributes on objects, and once activated does not waste time checking for attribute presence, etc.:
import funct...
Can't find the 'libpq-fe.h header when trying to install pg gem
...
I could solve this in another way. I didn't find the library on my system. Thus I installed it using an app from PostgreSQL main website. In my case (OS X) I found the file under /Library/PostgreSQL/9.1/include/ once the installation was over. You may also have the file somewhere else de...