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Why use Abstract Base Classes in Python?
...t. Thank you. I think that the Addendum, "just don't do that" trap, is a bit like doing normal subclass inheritance but then having the C subclass delete (or screw up beyond repair) the abc_method() inherited from MyABC. The principal difference is that it's the superclass that is screwing up the ...
How to check if a python module exists without importing it
...being, if you can find a loader for it, then it exists. You can also be a bit more smart about it, like filtering out what loaders you will accept. For example:
import importlib
spam_loader = importlib.find_loader('spam')
# only accept it as valid if there is a source file for the module - no byte...
Node.js project naming conventions for files & folders
...ith the Unix-style directory structure (whereas the former mixes this up a bit).
I also like this pattern to separate files:
lib/index.js
var http = require('http');
var express = require('express');
var app = express();
app.server = http.createServer(app);
require('./config')(app);
require('...
Tuples( or arrays ) as Dictionary keys in C#
...le, if the three values are integer types together not taking more than 64 bits, you could combine them into a ulong.
Worst-case you can always use a string, as long as you make sure the three components in it are delimited with some character or sequence that does not occur inside the components o...
Maven error “Failure to transfer…”
...ated" -exec grep -q "Could not transfer" {} \; -print -exec rm {} \;
For windows:
cd %userprofile%\.m2\repository
for /r %i in (*.lastUpdated) do del %i
Then rightclick on your project in eclipse and choose Maven->"Update Project ...", make sure "Update Dependencies" is checked in the result...
How to decorate a class?
...nit__(self, value1):
pass
Replacing the constructor is perhaps a bit dramatic, but the language does provide support for this kind of deep introspection and dynamic modification.
share
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i...
How to use glOrtho() in OpenGL?
...ic int ortho = 0;
static void display(void) {
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
if (ortho) {
} else {
/* This only rotates and translates the world around to look like the camera moved. */
gluLookAt(0.0, 0.0, -3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}
...
android get real path by Uri.getPath()
...n comments... Thanks for this link !
.
the code to get the real path is a bit different from one SDK to another so below we have three methods that deals with different SDKs.
getRealPathFromURI_API19(): returns real path for API 19 (or above but not tested)
getRealPathFromURI_API11to18(): returns ...
Where IN clause in LINQ [duplicate]
...
This little bit different idea. But it will useful to you. I have used sub query to inside the linq main query.
Problem:
Let say we have document table. Schema as follows
schema : document(name,version,auther,modifieddate)
composite Ke...
How do I determine if a port is open on a Windows server? [closed]
...running on that port
timeout means that a firewall is blocking access
On Windows 7 or Windows Vista the default option 'telnet' is not recognized as an internal or external command, operable program or batch file. To solve this, just enable it: Click *Start** → Control Panel → Programs → T...