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Transpose list of lists
...
One way to do it is with NumPy transpose. For a list, a:
>>> import numpy as np
>>> np.array(a).T.tolist()
[[1, 4, 7], [2, 5, 8], [3, 6, 9]]
Or another one without zip:
>>> map(list,map(None,*a))
[...
How do I implement an Objective-C singleton that is compatible with ARC?
...;
return sharedInstance;
}
else,you should do this:
+ (id)allocWithZone:(NSZone *)zone
{
static MyClass *sharedInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [super allocWithZone:zone];
});
return sharedInstance;...
How can I mix LaTeX in with Markdown? [closed]
...nline LaTeX and LaTeX templates for 10 years.
Documents like the following one can be written in Markdown:
---
title: Just say hello!
author: My Friend
header-includes: |
\usepackage{tikz,pgfplots}
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhead[CO,CE]{This is fancy}
\fancyfoo...
Difference between @Mock and @InjectMocks
...}
class Game {
private Player player;
private List<String> opponents;
public Game(Player player, List<String> opponents) {
this.player = player;
this.opponents = opponents;
}
public int numberOfEnemies() {
return opponents.size();
}
// ...
That's because...
How can I beautify JavaScript code using Command Line?
...pick your favorite Javascript based Pretty Print/Beautifier. I prefer the one at http://jsbeautifier.org/, because it's what I found first. Downloads its file https://github.com/beautify-web/js-beautify/blob/master/js/lib/beautify.js
Second, download and install The Mozilla group's Java based Jav...
How to clear basic authentication details in chrome
... Doesn't work for me in Chrome 28 on Mac. If I log in with one user then put a different user in the URL, it seems to use the old user and password.
– Jason
Jul 27 '13 at 18:47
...
Argparse optional positional arguments?
...
Use nargs='?' (or nargs='*' if you will need more than one dir)
parser.add_argument('dir', nargs='?', default=os.getcwd())
extended example:
>>> import os, argparse
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('-v', action='store_t...
Why use double indirection? or Why use pointers to pointers?
When should a double indirection be used in C? Can anyone explain with a example?
18 Answers
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Java “Virtual Machine” vs. Python “Interpreter” parlance?
...ny statically-typed code interactively
would be tedious, so it just isn't done that way.
In the Java world, the virtual machine steals the show because it runs programs
written in a language which can actually be compiled into machine instructions,
and the result is speed and resource efficiency. ...
C++ IDE for Linux? [closed]
...and configure several plugins to make the editor work nicely (that’s the one annoying part). For example, most programmers on Vim will benefit from the YouCompleteMe plugin for smart autocompletion.
Once that’s done, the shell is your command interface to interact with the various tools — Deb...