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Error while installing json gem 'mkmf.rb can't find header files for ruby'
...h has a firewall. I'm setting up my environment through a proxy. I have ruby 1.8.7 . When I try to gem install..
16 Answer...
What's the difference between std::move and std::forward
...o illustrate:
void overloaded( int const &arg ) { std::cout << "by lvalue\n"; }
void overloaded( int && arg ) { std::cout << "by rvalue\n"; }
template< typename t >
/* "t &&" with "t" being template param is special, and adjusts "t" to be
(for example) "in...
Best way to create enum of strings?
...ce value, or the element name. However, you can customize the string value by overriding toString() method. For example,
public enum MyType {
ONE {
public String toString() {
return "this is one";
}
},
TWO {
public String toString() {
return "this is two...
In which language are the Java compiler and JVM written?
...l have been written in C or C++.
I believe that the Java compiler provided by Sun is also written in Java. (Although again, there are multiple compilers out there)
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Android - Set max length of logcat messages
By default, it seems that logcat will truncate any log message that it considers to be "too long". This happens both inside of Eclipse and when running logcat on the command line using adb -d logcat , and is truncating some important debugging messages.
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How do I change an HTML selected option using JavaScript?
...
Change
document.getElementById('personlist').getElementsByTagName('option')[11].selected = 'selected'
to
document.getElementById('personlist').value=Person_ID;
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How to concatenate two numbers in javascript?
...t into one thousand seven hundred and twenty-nine? Well we can multiply 17 by 100 then add 29. And how about 172 and 293 to get one hundred seventy-two thousand two hundred and ninety-three? Multiply 172 by 1000 and add 293. But what about only 2 and 9? Multiply 2 by 10 then add 9 to get 29.
So hop...
Is “ ” a replacement of “ ”?
...T application, I was trying to add few white spaces between two text boxes by typing space bar. The equivalent HTML source was &#160; instead of &nbsp; . So I just wanted to check: is this the new replacement for white space? If yes, any idea why they changed?
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Server is already running in Rails
...s detached then follow below guidelines:
If you detached you rails server by using command "rails -d" then,
Remove rails detached server by using command
ps -aef | grep rails
OR by this command
sudo lsof -wni tcp:3000
then
kill -9 pID
OR use this command
To find and kill process by port...
RabbitMQ message size and types
... preconditions:
The thing you are sending can be converted to and from a bytestring
The consumer knows exactly what it is getting and how to convert it to the original object
Strings are pretty easy, they have a built in method for converting to and from bytes. If you know it is a string then ...