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Is null reference possible?

... References are not pointers. 8.3.2/1: A reference shall be initialized to refer to a valid object or function. [Note: in particular, a null reference cannot exist in a well-defined program, because the only way to create such a reference would be to bind it to the “object...
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/etc/apt/sources.list" E212: Can't open file for writing

I am trying to edit sources.list using vi editor but getting the following error while saving the file: 12 Answers ...
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Reliable way for a Bash script to get the full path to itself [duplicate]

I have a Bash script that needs to know its full path. I'm trying to find a broadly-compatible way of doing that without ending up with relative or funky-looking paths. I only need to support Bash, not sh, csh, etc. ...
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How to add a search box with icon to the navbar in Bootstrap 3?

I am using the new Twitter Bootstrap 3, and am trying to place a search box like this (below) in the top navbar : 6 Answer...
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Difference between SRC and HREF

The SRC and HREF attributes are used to include some external entities like an image, a CSS file, a HTML file, any other web page or a JavaScript file. ...
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How do I detect if software keyboard is visible on Android Device or not?

...Dianne Hackborn from the Android team has replied. However, you can detect it indirectly by checking if the window size changed in #onMeasure. See How to check visibility of software keyboard in Android?. share | ...
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VS 2012: Scroll Solution Explorer to current file

... Tools - > Options - > Projects and Solutions - > Track Active Item in Solution Explorer It's off by default (as you've noticed), but once it's on, Solution Explorer will expand folders and highlight the current document as you switch between files. ...
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Chrome says “Resource interpreted as script but transferred with MIME type text/plain.”, what gives?

In FF and all, my javascript works fine. But in Chrome it gives this message: 20 Answers ...
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Slow Requests on Local Flask Server

Just starting to play around with Flask on a local server and I'm noticing the request/response times are way slower than I feel they should be. ...
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Understanding repr( ) function in Python

repr() : evaluatable string representation of an object (can "eval()" it, meaning it is a string representation that evaluates to a Python object) ...