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Why is address zero used for the null pointer?

In C (or C++ for that matter), pointers are special if they have the value zero: I am adviced to set pointers to zero after freeing their memory, because it means freeing the pointer again isn't dangerous; when I call malloc it returns a pointer with the value zero if it can't get me memory; I use ...
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Receiving “fatal: Not a git repository” when attempting to remote add a Git repo

... Did you init a local Git repository, into which this remote is supposed to be added? Does your local directory have a .git folder? Try git init. share | ...
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Objective-C formatting string for boolean?

... One way to do it is to convert to strings (since there are only two possibilities, it isn't hard): NSLog(@" %s", BOOL_VAL ? "true" : "false"); I don't think there is a format specifier for boolean values. share ...
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Recommended way to embed PDF in HTML?

What is the recommended way to embed PDF in HTML? 24 Answers 24 ...
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How do you use vim's quickfix feature?

I'm a pretty new Vim user and I've found that its learning curve is quite steep (at least for me). I just installed this vim script for JavaScriptLint error checking, which shows errors in vim's quickfix window once I save a buffer. ...
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What is the Gradle artifact dependency graph command?

... The command is gradle dependencies, and its output is much improved in Gradle 1.2. (You can already try 1.2-rc-1 today.) share | improve this answe...
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Finding three elements in an array whose sum is closest to a given number

Given an array of integers, A 1 , A 2 , ..., A n , including negatives and positives, and another integer S. Now we need to find three different integers in the array, whose sum is closest to the given integer S. If there exists more than one solution, any of them is ok. ...
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Search all of Git history for a string? [duplicate]

I have a code base which I want to push to GitHub as open source. In this git-controlled source tree, I have certain configuration files which contain passwords. I made sure not to track this file and I also added it to the .gitignore file. However, I want to be absolutely positive that no sensiti...
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Custom Adapter for List View

I want to create a custom adapter for my list view. Is there any article that can walk me through how to create one and also explain how it works? ...
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Why is “while ( !feof (file) )” always wrong?

I've seen people trying to read files like this in a lot of posts lately: 5 Answers 5 ...