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Why can't I forward-declare a class in a namespace using double colons?

... Because you can't. In C++ language fully-qualified names are only used to refer to existing (i.e. previously declared) entities. They can't be used to introduce new entities. And you are in fact "reopening" the namespace to declare new entities. If the ...
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How can I trim beginning and ending double quotes from a string?

I would like to trim a beginning and ending double quote (") from a string. How can I achieve that in Java? Thanks! 17 An...
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URL Encode a string in jQuery for an AJAX request

I'm implementing Google's Instant Search in my application. I'd like to fire off HTTP requests as the user types in the text input. The only problem I'm having is that when the user gets to a space in between first and last names, the space is not encoded as a + , thus breaking the search. How can ...
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How to create ls in windows command prompt?

... hmjdhmjd 111k1616 gold badges185185 silver badges238238 bronze badges ...
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Check folder size in Bash

I'm trying to write a script that will calculate a directory size and if the size is less than 10GB, and greater then 2GB do some action. Where do I need to mention my folder name? ...
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Can a decorator of an instance method access the class?

I have something roughly like the following. Basically I need to access the class of an instance method from a decorator used upon the instance method in its definition. ...
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Using a piano keyboard as a computer keyboard [closed]

...have tried 30 different computer keyboards which all caused me pain. Playing piano does not cause me pain. I have played piano for around 20 years without any pain issues. I would like to know if there is a way to capture MIDI from a MIDI keyboard and output keyboard strokes. I know nothing at all a...
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Best way to unselect a in jQuery?

What is the best way, using jQuery, to elegantly unselect the option? 15 Answers 15 ...
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When to use Vanilla JavaScript vs. jQuery?

I have noticed while monitoring/attempting to answer common jQuery questions, that there are certain practices using javascript, instead of jQuery, that actually enable you to write less and do ... well the same amount. And may also yield performance benefits. ...
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Get class name using jQuery

I want to get the class name using jQuery 19 Answers 19 ...