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What is the performance cost of having a virtual method in a C++ class?
Having at least one virtual method in a C++ class (or any of its parent classes) means that the class will have a virtual table, and every instance will have a virtual pointer.
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.gitignore file, where should I put it in my xcode project?
... single directory of your project.
However, the best practice is to have one single .gitignore file on the project root directory, and place all files that you want to ignore in it, like this:
ignoredFile.whatever
ignoredDirectory/*
directory/ignoredFileInsideDirectory
.svn
Once you create the ...
Location of my.cnf file on macOS
...nd depends on which installer you used to install mysql. Homebrew puts it one place, the dmg installer puts it another
– slashdottir
Dec 3 '18 at 23:08
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How do I pass data between Activities in Android application?
... using setData and what is difference between theses two approaches? Which one is better?
– Hosein Aqajani
Jul 18 '16 at 13:04
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Why does Java switch on contiguous ints appear to run faster with added cases?
...ying double variables by 10 raised to arbitrary non-negative int exponent s. One fast way (edit: but not the fastest possible, see Update 2 below) to get the multiplied value is to switch on the exponent :
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OS X: equivalent of Linux's wget
... will also need to install Xcode and the Command Line Tools. Virtually anyone who uses the command line in OSX will want to install these things anyway.
If you can't or don't want to use homebrew, you could also:
Install wget manually:
curl -# "http://ftp.gnu.org/gnu/wget/wget-1.17.1.tar.xz" -o ...
Create a list from two object lists with linq
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This can easily be done by using the Linq extension method Union. For example:
var mergedList = list1.Union(list2).ToList();
This will return a List in which the two lists are merged and doubles are removed. If you don't specify a comparer in...
What is the difference between libsqlite3.dylib and libsqlite3.0.dylib?
...Lite databases in an app I'm working on. I've not run into issues yet but one of the early steps from this tutorial is linking the SQLite3 framework. The tutorial calls for libsqlite3.0.dylib but I noticed another one libsqlite3.dylib. Is the latter just a symlink to the latest v3 library like ...
Python Remove last 3 characters of a string
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Converting to capital letters:
foo = foo.upper()
All of that code in one line:
foo = ''.join(foo.split())[:-3].upper()
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How can I make PHP display the error instead of giving me 500 Internal Server Error [duplicate]
...ff; about 100 lines below my
display_errors = on;
So remember the last one counts!
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