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using gitignore to ignore (but not delete) files

I have a tmp directory in my git repo I'd like to still exist, but be ignored. I added it to .gitignore , but git status still tells me about changes to files in that directory. I tried git rm -r --cached , but that removes it from the remote repo. How can I stop tracking changes to this dire...
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How to make git-diff and git log ignore new and deleted files?

Sometimes there's a couple of changed files together with some new, deleted and/or renamed files. When doing git diff or git-log I'd like to omit them, so I can better spot the modifications. ...
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Swift - Convert to absolute value

is there any way to get absolute value from an integer? for example 4 Answers 4 ...
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How to disable/enable the sleep mode programmatically in iOS?

I have an app that must stay awake until the end of a countdown but it will go into 'sleep mode' whenever it reaches the allocated time to sleep. ...
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jQuery: keyPress Backspace won't fire?

I wonder what I'm doing wrong: 4 Answers 4 ...
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Firebug says “No Javascript on this page”, even though JavaScript does exist on the page

Why does Firebug say there is No Javascript on this page when there are clearly loads of JavaScript on the page. I even reloaded the page several time to make sure but it still show the same message. ...
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Find directory name with wildcard or similar to “like”

I am using the following command to find a directory name. 1 Answer 1 ...
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Is it good practice to NULL a pointer after deleting it?

I'll start out by saying, use smart pointers and you'll never have to worry about this. 18 Answers ...
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get an element's id

Is there another way to get an DOM element's ID? 8 Answers 8 ...
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Set port for php artisan.php serve

How do we set a custom port for test server? 9 Answers 9 ...