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What does (function($) {})(jQuery); mean?

I am just starting out with writing jQuery plugins. I wrote three small plugins but I have been simply copying the line into all my plugins without actually knowing what it means. Can someone tell me a little more about these? Perhaps an explanation will come in handy someday when writing a framewor...
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Advantages of std::for_each over for loop

Are there any advantages of std::for_each over for loop? To me, std::for_each only seems to hinder the readability of code. Why do then some coding standards recommend its use? ...
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Using emit vs calling a signal as if it's a regular function in Qt

... emit is just syntactic sugar. If you look at the pre-processed output of function that emits a signal, you'll see emit is just gone. The "magic" happens in the generated code for the signal emitting function, which you can lo...
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Does C++ support 'finally' blocks? (And what's this 'RAII' I keep hearing about?)

...nstead supports RAII: "Resource Acquisition Is Initialization" -- a poor name† for a really useful concept. The idea is that an object's destructor is responsible for freeing resources. When the object has automatic storage duration, the object's destructor will be called when the block in whi...
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Making 'git log' ignore changes for certain paths

How can I make git log only show commits that changed files other than the ones I specify? 3 Answers ...
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jQuery - If element has class do this

I need an jQuery script that will see if any element has an specific class and do an action like change position. 1 Answer ...
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How to change a PG column to NULLABLE TRUE?

How can I accomplish this using Postgres? I've tried the code below but it doesn't work: 1 Answer ...
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What can I do with a moved-from object?

...he standard define precisely what I can do with an object once it has been moved from? I used to think that all you can do with a moved-from object is do destruct it, but that would not be sufficient. ...
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How to clear variables in ipython?

Sometimes I rerun a script within the same ipython session and I get bad surprises when variables haven't been cleared. How do I clear all variables? And is it possible to force this somehow every time I invoke the magic command %run? ...
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Step out of current function with GDB

Those who use Visual Studio will be familiar with the Shift + F11 hotkey , which steps out of a function, meaning it continues execution of the current function until it returns to its caller, at which point it stops. ...