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Facebook Post Link Image

When someone posts a link on facebook, a script usually scans that link for any images, and displays a quick thumbnail next to the post. For certain URLs though (including mine), FB doesn't seem to pick up anything, despite their being a number of images on that page. ...
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What is the difference between char s[] and char *s?

In C, one can use a string literal in a declaration like this: 13 Answers 13 ...
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What does the Subversion status symbol “~” mean?

I am getting a tilde symbol when I do an svn status . 11 Answers 11 ...
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When to use single quotes, double quotes, and backticks in MySQL

I am trying to learn the best way to write queries. I also understand the importance of being consistent. Until now, I have randomly used single quotes, double quotes, and backticks without any real thought. ...
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How much size “Null” value takes in SQL Server

I have a large table with say 10 columns. 4 of them remains null most of the times. I have a query that does null value takes any size or no size in bytes. I read few articles some of them are saying : ...
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How to Generate unique file names in C#

I have implemented an algorithm that will generate unique names for files that will save on hard drive. I'm appending DateTime : Hours,Minutes,Second and Milliseconds but still it generates duplicate name of files because im uploading multiple files at a time. ...
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Hidden Features of VB.NET?

I have learned quite a bit browsing through Hidden Features of C# and was surprised when I couldn't find something similar for VB.NET. ...
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Adding a cross-reference to a subheading or anchor in another page

How to insert a cross-reference in a reST/Sphinx page to either a sub-header or anchor in another page in the same documentation set? ...
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How to print out the contents of a vector?

I want to print out the contents of a vector in C++, here is what I have: 19 Answers 1...
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What are bitwise operators?

I'm someone who writes code just for fun and haven't really delved into it in either an academic or professional setting, so stuff like these bitwise operators really escapes me. ...