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Can't find the 'libpq-fe.h header when trying to install pg gem
I am using the Ruby on Rails 3.1 pre version. I like to use PostgreSQL, but the problem is installing the pg gem. It gives me the following error:
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How to use mod operator in bash?
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Static variables in member functions
...taticVariable()
{
static int staticVar = 0; //staticVar is initialised by 0 the first time
cout<<"Variable Value : "<<staticVar<<endl;
staticVar++;
}
void CVariableTesting::FuncWithAutoVariable()
{
int autoVar = 0;
cout<<"Variable Value : "<<autoVar&...
How to configure slf4j-simple
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You can programatically change it by setting the system property:
public class App {
public static void main(String[] args) {
System.setProperty(org.slf4j.impl.SimpleLogger.DEFAULT_LOG_LEVEL_KEY, "TRACE");
final org.slf4j.Logger log = ...
WPF Auto height in code
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How to check that a string is a palindrome using regular expressions?
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@SteveMoser In Ruby 1.9.x, regular expressions are no longer Regular (in the Automata Theory sense) and thus things like checking for palindromes is possible. However, for the intents and purposes, palindromes cannot be checked with a Regular...
Why use Gradle instead of Ant or Maven? [closed]
...dency programming features Gradle adds project and JAR dependency features by intergration with Apache Ivy. As you know Ivy is a much more powerful and much less opinionated dependency management tool than say Maven.
Gradle detects dependencies between projects and between projects and JARs. Gradle...
Check if a Class Object is subclass of another Class Object in Java
...hod. Do I need to walk through all getSuperClass() and find my supeclass by my own?
7 Answers
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How to convert a byte array to a hex string in Java?
I have a byte array filled with hex numbers and printing it the easy way is pretty pointless because there are many unprintable elements. What I need is the exact hexcode in the form of: 3a5f771c
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Fixed stroke width in SVG
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