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How to check if an object is a list or tuple (but not string)?
...) and not isinstance(obj, str):
print("obj is a sequence (list, tuple, etc) but not a string")
Changed in version 3.3: Moved Collections Abstract Base Classes to the collections.abc module. For backwards compatibility, they will continue to be visible in this module as well until version 3....
Building a minimal plugin architecture in Python
...command-line tool? A set of scripts? A program with an unique entry point, etc...
Given the little information I have, I will answer in a very generic manner.
What means do you have to add plugins?
You will probably have to add a configuration file, which will list the paths/directories to load...
What is the best regular expression to check if a string is a valid URL?
...EFFFD}!\$&'\(\)\*\+,;=:@])|[\/\?])*)?)$/i
How they were compiled (in PHP):
<?php
/* Regex convenience functions (character class, non-capturing group) */
function cc($str, $suffix = '', $negate = false) {
return '[' . ($negate ? '^' : '') . $str . ']' . $suffix;
}
function ncg($str, $...
How do I check if a column is empty or null in MySQL?
...= ' ' IS TRUE
'' = ' ' IS TRUE
' ' = ' ' IS TRUE
' ' = ' ' IS TRUE
etc
Therefore, this should work regardless of how many spaces make up the some_col value:
SELECT *
FROM T
WHERE some_col IS NULL
OR some_col = ' ';
or more succinctly:
SELECT *
FROM T
WHERE NULLIF(some_c...
Sort an Array by keys based on another Array?
Is it possible in PHP to do something like this? How would you go about writing a function? Here is an example. The order is the most important thing.
...
比起创业孵化器 双创中国更急需的是创业教育 - 资讯 - 清泛网 - 专注C/C++...
...创业者面对面分享自己的心得体会，探讨创业路上的具体问题。这种分享是免费和开放的。诸多的谷创业明星都曾来到这个平台进行分享，影响了一批又一批的创业者。
而在中国，这种创业分享形式却被现实原因所阻碍。最为...
Java equivalent to C# extension methods
...no limitations and does not suffer from issues with generics, lambdas, IDE etc. Manifold provides several other features such as F#-style custom types, TypeScript-style structural interfaces, and Javascript-style expando types.
Additionally, IntelliJ provides comprehensive support for Manifold via...
Inline functions vs Preprocessor macros
...Because the compiler will not inline if doing so will generate slower code etc. The compiler does a lot of analysis that the Engineer can not and does the correct thing.
– Martin York
Jul 16 '09 at 16:20
...
Pretty graphs and charts in Python [closed]
...ackends for Tk, Qt, Wx, Cocoa, and many image types such as PDF, EPS, PNG, etc.). The main advantages of Chaco are its speed relative to Matplotlib and its integration with Enthought's Traits API for interactive applications.
...
Global variables in Javascript across multiple files
...copy/pasted" into your HTML page before the page is rendered. Or into your PHP page if you will. Please correct me if I'm wrong here. Thanx.
My example files follow:
EXTERNAL JS:
var global = 0;
function f1()
{
alert('fired: f1');
global = 1;
alert('global changed to 1');
}
function...