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Writing a list to a file with Python
Is this the cleanest way to write a list to a file, since writelines() doesn't insert newline characters?
21 Answers
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C# Lazy Loaded Automatic Properties
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No there is not. Auto-implemented properties only function to implement the most basic of properties: backing field with getter and setter. It doesn't support this type of customization.
However you can use the 4.0 Lazy<T> ...
C# - How to get Program Files (x86) on Windows 64 bit
...c string ProgramFilesx86()
{
if( 8 == IntPtr.Size
|| (!String.IsNullOrEmpty(Environment.GetEnvironmentVariable("PROCESSOR_ARCHITEW6432"))))
{
return Environment.GetEnvironmentVariable("ProgramFiles(x86)");
}
return Environment.GetEnvironmentVariable("ProgramFiles");...
How to convert a string of numbers to an array of numbers?
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My 2 cents for golfers:
b="1,2,3,4".split`,`.map(x=>+x)
backquote is string litteral so we can omit the parenthesis (because of the nature of split function) but it is equivalent to split(','). The string is now an array, we just have to map each value with a function returning the integer ...
How to add column if not exists on PostgreSQL?
Question is simple. How to add column x to table y , but only when x column doesn't exist ? I found only solution here how to check if column exists.
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Dealing with “java.lang.OutOfMemoryError: PermGen space” error
Recently I ran into this error in my web application:
32 Answers
32
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How to use the PI constant in C++
...lt;math.h> . However, there doesn't seem to be a definition for PI in this header file.
21 Answers
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How to hide one item in an Android Spinner
I am looking for a way to hide one item in an Android spinner widget. This would allow you to simulate a spinner with no items selected, and ensures that the onItemSelected() callback is always called for every item selected (if the hidden item is the "current" one). Normally there is always one ite...
How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
(Note: This question is about not having to specify the number of elements and still allow nested types to be directly initialized.)
This question discusses the uses left for a C array like int arr[20]; . On his answer , @James Kanze shows one of the last strongholds of C arrays, it's unique i...
How do I get class name in PHP?
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class ClassName {}
echo ClassName::class;
?>
If you want to use this feature in your class method use static::class:
<?php
namespace Name\Space;
class ClassName {
/**
* @return string
*/
public function getNameOfClass()
{
return static::class;
}
}
$obj = new...