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How do I implement interfaces in python?
...unting = IncompleteAccountingSystem()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: Can't instantiate abstract class IncompleteAccountingSystem with abstract methods
create_purchase_invoice, create_sale_invoice
You can also have abstract properties...
Changing three.js background to transparent or other color
...rer with an alpha value and the clear color, I had to go into the app.json file and find the "Scene" Object's "background" attribute and set it to:
"background: null".
The export from Three.js editor had it originally set to "background": 0
...
Random record from MongoDB
...y a feature request: http://jira.mongodb.org/browse/SERVER-533 but it was filed under "Won't fix."
The cookbook has a very good recipe to select a random document out of a collection: http://cookbook.mongodb.org/patterns/random-attribute/
To paraphrase the recipe, you assign random numbers to yo...
Unable to hide welcome screen in Emacs
...rtup-screen, so simply add (setq inhibit-startup-screen t) to your .emacs file will solve the problem.
Given that configuration, your startup buffer is now *scratch*, if you want to further change the default buffer, M-h v initial-buffer-choice <RET> will help.
Official document: http://www...
Ruby: How to turn a hash into HTTP parameters?
...
Steal from Merb:
# File merb/core_ext/hash.rb, line 87
def to_params
params = ''
stack = []
each do |k, v|
if v.is_a?(Hash)
stack << [k,v]
else
params << "#{k}=#{v}&"
end
end
stack.each do |pa...
Forward an invocation of a variadic function in C
...e uses frame pointers and the 'standard' calling conventions.
This header file allows to wrap variadic functions for x86_64 and i386 (GCC). It doesn't work for floating-point arguments, but should be straight forward to extend for supporting those.
#ifndef _VA_ARGS_WRAPPER_H
#define _VA_ARGS_WRAPP...
Access Asset Catalog programmatically
...ically. How would I access my images, now? Do I still access them by their file names like so:
4 Answers
...
View all TODO items in Visual Studio using GhostDoc
...me way as the solution. The default view is just ordered alphabetically by file name containing the comment.
– Kijana Woodard
Jun 27 '14 at 3:39
...
What is the easiest way to push an element to the beginning of the array?
... irb> require 'methodsolver' causes LoadError: cannot load such file -- method_source from ... from /var/lib/gems/1.9.1/gems/methodsolver-0.0.4/lib/methodsolver.rb:2. Ruby 1.9.3p484, irb 0.9.6, Ubuntu 14.
– Camille Goudeseune
May 17 '17 at 21:24
...
How to align texts inside of an input?
... part of the text after loosing focus. e.g. useful if you want to show the file name in a large path.
input.rightAligned {
direction:ltr;
overflow:hidden;
}
input.rightAligned:not(:focus) {
direction:rtl;
text-align: left;
unicode-bidi: plaintext;
text-overflow: ellipsis;
}...