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(this == null) in C#!
...o a bug that was fixed in C# 4, the following program prints true . (Try it in LINQPad)
6 Answers
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How can I force Powershell to return an array when a call only returns one object?
...g Powershell to set up IIS bindings on a web server, and having a problem with the following code:
7 Answers
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How to get Linux console window width in Python
... determine the width of the console? I mean the number of characters that fits in one line without wrapping, not the pixel width of the window.
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Convert string to binary in python
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edited May 22 at 18:56
Akshay Pratap Singh
2,2571717 silver badges2828 bronze badges
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What are rvalues, lvalues, xvalues, glvalues, and prvalues?
In C++03, an expression is either an rvalue or an lvalue .
11 Answers
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What is the most effective way for float and double comparison?
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Be extremely careful using any of the other suggestions. It all depends on context.
I have spent a long time tracing a bugs in a system that presumed a==b if |a-b|<epsilon. The underlying problems were:
The implicit presumption in an algorithm that if a==b and b==c then a==c...
How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
I have a simple form that submits text to my SQL table. The problem is that after the user submits the text, they can refresh the page and the data gets submitted again without filling the form again. I could redirect the user to another page after the text is submitted, but I want users to stay on ...
Replacing Spaces with Underscores
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As of others have explained how to do it using str_replace, you can also use regex to achieve this.
$name = preg_replace('/\s+/', '_', $name);
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How to add a new method to a php object on the fly?
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edited Mar 13 '13 at 20:59
Ivan Castellanos
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How to create a zip archive of a directory in Python?
...'t really explain how you can use them to zip an entire directory. I think it's easiest to explain with some example code:
#!/usr/bin/env python
import os
import zipfile
def zipdir(path, ziph):
# ziph is zipfile handle
for root, dirs, files in os.walk(path):
for file in files:
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