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?: operator (the 'Elvis operator') in PHP
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It evaluates to the left operand if the left operand is truthy, and the right operand otherwise.
In pseudocode,
foo = bar ?: baz;
roughly resolves to
foo = bar ? bar : baz;
or
if (bar) {
foo = bar;
} else {
foo = baz;
}
with the differe...
How to populate/instantiate a C# array with a single value?
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i++ copies i, increments i, and returns the original value. ++i just returns the incremented value. Therefore ++i is faster, which can be significant in large loops like we're talking about here.
– tenpn
Nov 8 '12 ...
Understanding the Gemfile.lock file
After running the bundle install command, 'Gemfile.lock ' is created in the working directory. What do the directives inside that file mean?
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Is pass-by-value a reasonable default in C++11?
In traditional C++, passing by value into functions and methods is slow for large objects, and is generally frowned upon. Instead, C++ programmers tend to pass references around, which is faster, but which introduces all sorts of complicated questions around ownership and especially around memory ma...
Convert boolean result into number/integer
... answered Oct 19 '11 at 11:38
Andy RoseAndy Rose
14.9k66 gold badges3838 silver badges4848 bronze badges
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Interview questions: WPF Developer [closed]
...ed no one has mentioned basic knowledge of XAML yet. Knowing what XAML is, and the ability to do some basic editing using XAML rather than a graphical design tool. Mid-level developers should be able to knock up form / graphic prototypes using a tool like XAMLPad.
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Instance variable: self vs @
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I have once read a book in rails and don't understand the difference between this self and @, so I should always use self.var_name in my methods (that doesn't setter and getter) to make my data using public interface, I spent time defining it in getter and s...
Manipulate a url string by adding GET parameters
I want to add GET parameters to URLs that may and may not contain GET parameters without repeating ? or & .
15 Answe...
How do the major C# DI/IoC frameworks compare? [closed]
At the risk of stepping into holy war territory, What are the strengths and weaknesses of these popular DI/IoC frameworks, and could one easily be considered the best? ..:
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Vim: How to change the highlight color for search hits and quickfix selection
...ors/desert.vim. Color mappings are defined there with the hi[ghlight] command. The search highlighting is defined as
hi Search guibg=peru guifg=wheat
for the GUI and
hi Search cterm=NONE ctermfg=grey ctermbg=blue
for terminals.
You can override this setting in your .vimrc using the same com...