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What's the difference between `1L` and `1`?

I often seen the symbol 1L (or 2L , 3L , etc) appear in R code. Whats the difference between 1L and 1 ? 1==1L evaluates to TRUE . Why is 1L used in R code? ...
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When should I use File.separator and when File.pathSeparator?

In the File class there are two strings, separator and pathSeparator . 3 Answers ...
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Setting focus on an HTML input box on page load

I'm trying to set the default focus on an input box when the page loads (example: google). My page is very simple, yet I can't figure out how to do this. ...
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Convert Object to JSON string

jQuery.parseJSON('{"name":"John"}') converts string representation to object but I want the reverse. Object is to be converted to JSON string I got a link http://www.devcurry.com/2010/03/convert-javascript-object-to-json.html but it need to have json2.js do jQuery has a native method to do this? ...
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Using Position Relative/Absolute within a TD?

I have the following code: 5 Answers 5 ...
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Mercurial .hgignore for Visual Studio 2010 projects

Not to be confused with Mercurial .hgignore for Visual Studio 2008 projects 2 Answers ...
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Convert Enumeration to a Set/List

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Intercept page exit event

When editing a page within my system, a user might decide to navigate to another website and in doing so could lose all the edits they have not saved. ...
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What are the correct link options to use std::thread in GCC under linux?

Hi I am trying to use std::thread with G++. Here is my test code 5 Answers 5 ...
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How is Generic Covariance & Contra-variance Implemented in C# 4.0?

I didn't attend PDC 2008, but I heard some news that C# 4.0 is announced to support Generic covariance and contra-variance. That is, List<string> can be assigned to List<object> . How could that be? ...