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Suppress warning “Category is implementing a method which will also be implemented by its primary cl
...you want to reimplement a method that already exists in the class, you typically create a subclass instead of a category.
Apple documentation: Customizing existing classes
If the name of a method declared in a
category is the same as a method in the original class, or a method in
another ca...
How do you manage databases in development, test, and production?
...
Have a look at how Ruby on Rails does this.
First there are so called migration files, that basically transform database schema and data from version N to version N+1 (or in case of downgrading from version N+1 to N). Database has table which tells current version.
Test databases are al...
What is a clearfix?
... of laying out elements.)
A clearfix is a way for an element to automatically clear its child elements, so that you don't need to add additional markup. It's generally used in float layouts where elements are floated to be stacked horizontally.
The clearfix is a way to combat the zero-height con...
Why should I use core.autocrlf=true in Git?
...
The only specific reasons to set autocrlf to true are:
avoid git status showing all your files as modified because of the automatic EOL conversion done when cloning a Unix-based EOL Git repo to a Windows one (see issue 83 for instance)
and your coding tools somehow depends on a nati...
Should I implement __ne__ in terms of __eq__ in Python?
...tations (for 3.7 at least, might be even earlier) __ne__ delegates automatically to __eq__ and the quote in this answer no longer exists in the docs. Bottom line it is perfectly pythonic to only implement __eq__ and let __ne__ delegate.
– bluesummers
Feb 24 at ...
ios app maximum memory budget
...import "mach/mach.h"
- (void)didReceiveMemoryWarning
{
// Remember to call super
[super didReceiveMemoryWarning];
// If we are using more than 45% of the memory, free even important resources,
// because the app might be killed by the OS if we don't
if ([self __getMemoryUsedPer...
Is it possible to install another version of Python to Virtualenv?
...ll to pick up the updated PATH.
From this point on, you should be able to call the following 2 python binaries from your shell python2.5 and python2.6
Create a new instance of virtualenv with python2.6:
mkvirtualenv --python=python2.6 yournewenv
...
What does DIM stand for in Visual Basic and BASIC?
...d I don't want to doubt it). The BBC Microcomputer used a variant of BASIC called BBC BASIC and it is described in the document. Even though, it doesn't say what does Dim stand for, it says (on page 104):
... you can dimension N$ to have as many entries as you want. For
example, DIM N$(1000) w...
Initializing a list to a known number of elements in Python [duplicate]
...t be written in Python. You should try C instead and implement wrappers to call your pre-initialized and pre-compiled code from Python.
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What is the significance of ProjectTypeGuids tag in the visual studio project file
What is the significance of the ProjectTypeGuids tag in a visual studio project?? When I created a WPF application, i am seeing two GUIDs in here.
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