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What are all the common undefined behaviours that a C++ programmer should know about? [closed]
What are all the common undefined behaviours that a C++ programmer should know about?
11 Answers
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What is a callback function?
...often confused by what a callback is because of the name of the damned thing.
A callback function is a function which is:
accessible by another function, and
is invoked after the first function if that first function completes
A nice way of imagining how a callback function works is that it is ...
Go to first line in a file in vim?
How do I go to first line in a file in vim ?
4 Answers
4
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Override devise registrations controller
I have added a field to the sign-up form that is based on a different model, see How do I use nested attributes with the devise model for the gory details. This part is working fine.
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How to implement “select all” check box in HTML?
I have an HTML page with multiple checkboxes.
29 Answers
29
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Java executors: how to be notified, without blocking, when a task completes?
...e a callback interface to receive whatever parameters you want to pass along in the completion notification. Then invoke it at the end of the task.
You could even write a general wrapper for Runnable tasks, and submit these to ExecutorService. Or, see below for a mechanism built into Java 8.
clas...
What is the difference between pip and conda?
I know pip is a package manager for python packages. However, I saw the installation on IPython's website use conda to install IPython.
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what is “strict mode” and how is it used?
I've been looking over the JavaScript reference on the Mozilla Developer Network, and I came across something called "strict mode" . I read it over and I'm having trouble understanding what it does. Can someone briefly explain (in general) what its purpose is and how it is useful?
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HTML5 Canvas Resize (Downscale) Image High Quality?
I use html5 canvas elements to resize images im my browser. It turns out that the quality is very low. I found this: Disable Interpolation when Scaling a <canvas> but it does not help to increase the quality.
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Get selected subcommand with argparse
When I use subcommands with python argparse, I can get the selected arguments.
2 Answers
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