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gem install: Failed to build gem native extension (can't find header files)

I am using Fedora 14 and I have MySQL and MySQL server 5.1.42 installed and running. Now I tried to do this as root user: 1...
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How to interpolate variables in strings in JavaScript, without concatenation?

I know in PHP we can do something like this: 16 Answers 16 ...
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How to compare variables to undefined, if I don’t know whether they exist? [duplicate]

In JavaScript you can declare a variable and if it’s undefined , you can check variable == undefined ; I know that, but how can you compare a value that you don’t know yet if it’s in memory? ...
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StringLength vs MaxLength attributes ASP.NET MVC with Entity Framework EF Code First

What is the difference in behavior of [MaxLength] and [StringLength] attributes? 8 Answers ...
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Cannot set boolean values in LocalStorage?

I noticed that I cannot set boolean values in localStorage ? 8 Answers 8 ...
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IntelliJ not recognizing a particular file correctly, instead its stuck as a text file

There is a freemarker file (ftl) in my IntelliJ project that is incorrectly recognized as a text file. There are many of the same type that are correct. I am aware of the "Mark as text" option. This may be the original reason this file was marked as text but I am not provided with a "mark as ftl fil...
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Why won't my PHP app send a 404 error?

Why wont this work? I get a blank page. 16 Answers 16 ...
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What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an

Following links explain x86-32 system call conventions for both UNIX (BSD flavor) & Linux: 4 Answers ...
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Get the client's IP address in socket.io

When using socket.IO in a Node.js server, is there an easy way to get the IP address of an incoming connection? I know you can get it from a standard HTTP connection, but socket.io is a bit of a different beast. ...
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Amazon S3 direct file upload from client browser - private key disclosure

I'm implementing a direct file upload from client machine to Amazon S3 via REST API using only JavaScript, without any server-side code. All works fine but one thing is worrying me... ...