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Should I pass an std::function by const-reference?

...rmance, pass by value if you are storing it. Suppose you have a function called "run this in the UI thread". std::future<void> run_in_ui_thread( std::function<void()> ) which runs some code in the "ui" thread, then signals the future when done. (Useful in UI frameworks where the UI ...
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Difference between framework and static library in xcode4, and how to call them

... is as a framework. To create a "static" framework for iOS, you can essentially take a normal framework and replace the binary with your compiled static library. This is how I distribute one of my libraries, Resty and is how I intend to distribute my libraries in the future. You may want to look at...
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How do I bind a WPF DataGrid to a variable number of columns?

... property is ReadOnly, like everyone noticed, I made an Attached Property called BindableColumns which updates the Columns in the DataGrid everytime the collection changes through the CollectionChanged event. If we have this Collection of DataGridColumn's public ObservableCollection<DataGrid...
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MongoDB and “joins” [duplicate]

I'm sure MongoDB doesn't officially support "joins". What does this mean? 11 Answers 1...
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Node.js Logging

...ny library which will help me to handle logging in my Node.Js application? All I want to do is, I want to write all logs into a File and also I need an options like rolling out the file after certain size or date. ...
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How do you round a float to two decimal places in jruby

...ing for that is discussed here, it's mostly about readability. Not that we all have to follow the style guide, just giving some reasons :) – Lucy Bain Sep 4 '14 at 1:10 ...
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How do I get PyLint to recognize numpy members?

... I had the same issue here, even with the latest versions of all related packages (astroid 1.3.2, logilab_common 0.63.2, pylon 1.4.0). The following solution worked like a charm: I added numpy to the list of ignored modules by modifying my pylintrc file, in the [TYPECHECK] section: [...
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How do I unload (reload) a Python module?

.... When targeting 3 or later, either reference the appropriate module when calling reload or import it. I think that this is what you want. Web servers like Django's development server use this so that you can see the effects of your code changes without restarting the server process itself. To quo...
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Inherit from a generic base class, apply a constraint, and implement an interface in C#

..., a class only gets one where clause, and it goes at the end for any & all generic type constraints. – Andy V Aug 22 '16 at 16:18 ...
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Merge two Git repositories without breaking file history

...ose instructions mostly works, except that when I commit the subtree merge all of the files from the old repositories are recorded as new added files. I can see the commit history from the old repositories when I do git log , but if I do git log <file> it shows only one commit for that fil...