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How can I pass a list as a command-line argument with argparse?
....add_argument('--default')
# Telling the type to be a list will also fail for multiple arguments,
# but give incorrect results for a single argument.
parser.add_argument('--list-type', type=list)
# This will allow you to provide multiple arguments, but you will get
# a list of lists which is not d...
PHP: How to remove all non printable characters in a string?
...Hot Tub Time Machine, and you're back in the eighties.
If you've got some form of 8 bit ASCII, then you might want to keep the chars in range 128-255. An easy adjustment - just look for 0-31 and 127
$string = preg_replace('/[\x00-\x1F\x7F]/', '', $string);
UTF-8?
Ah, welcome back to the 21st ce...
Getting image dimensions without reading the entire file
...is difficult, so here is some dodgy largely untested code that should work for a fair number of cases:
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
namespace ImageDimensions
{
public static class ImageHelper
{
const strin...
How do I prevent node.js from crashing? try-catch doesn't work
... read Node Docs:
Note that uncaughtException is a very crude mechanism for exception handling and may be removed in the future
PM2
First of all, I would highly recommend installing PM2 for Node.js. PM2 is really great at handling crash and monitoring Node apps as well as load balancing. PM2 i...
How do I declare a 2d array in C++ using new?
... can initialize it using a loop, like this:
int** a = new int*[rowCount];
for(int i = 0; i < rowCount; ++i)
a[i] = new int[colCount];
The above, for colCount= 5 and rowCount = 4, would produce the following:
shar...
Is inline assembly language slower than native C++ code?
I tried to compare the performance of inline assembly language and C++ code, so I wrote a function that add two arrays of size 2000 for 100000 times. Here's the code:
...
Differences between Octave and MATLAB? [closed]
...l examples where they are syntactically similar or identical, is this true for the whole language?
9 Answers
...
What is the most efficient string concatenation method in python?
...robably fast enough and has the benefit of being idiomatic and thus easier for other python programmers to understand.
Finally, the golden rule of optimization: don't optimize unless you know you need to, and measure rather than guessing.
You can measure different methods using the timeit module. ...
How does this milw0rm heap spraying exploit work?
I usually do not have difficulty to read JavaScript code but for this one I can’t figure out the logic. The code is from an exploit that has been published 4 days ago. You can find it at milw0rm .
...
Rails: How does the respond_to block work?
...s a block, which is like a delegate. The block is from do until end, with |format| as an argument to the block.
respond_to executes your block, passing a Responder into the format argument.
http://api.rubyonrails.org/v4.1/classes/ActionController/Responder.html
The Responder does NOT contain a m...