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How is “int main(){(([](){})());}” valid C++?
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The code essentially calls an empty lambda.
Let's start from the beginning: [](){} is an empty lambda expression.
Then, in C and C++, you can wrap expressions in parens and they behave exactly the same† as if written without them, so that's what the first pair...
CSS: Set a background color which is 50% of the width of the window
Trying to achieve a background on a page that is "split in two"; two colors on opposite sides (seemingly done by setting a default background-color on the body tag, then applying another onto a div that stretches the entire width of the window).
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Why use static_cast(x) instead of (int)x?
I've heard that the static_cast function should be preferred to C-style or simple function-style casting. Is this true? Why?
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New features in java 7
What new features in java 7 is going to be implemented?
And what are they doing now?
8 Answers
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Iterate over a list of files with spaces
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answered Aug 12 '11 at 11:06
martin claytonmartin clayton
70.9k2020 gold badges202202 silver badges191191 bronze badges
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Git command to display HEAD commit id?
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Jorge Ferreira
85.8k2323 gold badges107107 silver badges129129 bronze badges
answered Dec 28 '09 at 4:44
Randal SchwartzRandal Schw...
What's the point of 'const' in the Haskell Prelude?
...l for passing to higher-order functions when you don't need all their flexibility. For example, the monadic sequence operator >> can be defined in terms of the monadic bind operator as
x >> y = x >>= const y
It's somewhat neater than using a lambda
x >> y = x >>= \_...
How do I undo the most recent local commits in Git?
I accidentally committed the wrong files to Git , but I haven't pushed the commit to the server yet.
86 Answers
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Use jQuery to change an HTML tag?
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Once a dom element is created, the tag is immutable, I believe. You'd have to do something like this:
$(this).replaceWith($('<h5>' + this.innerHTML + '</h5>'));
share
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Break promise chain and call a function based on the step in the chain where it is broken (rejected)
...rOne)
.then(stepThree, handleErrorTwo)
.then(null, handleErrorThree);
To better understand what's happening, let's pretend this is synchronous code with try/catch blocks:
try {
try {
try {
var a = stepOne();
} catch(e1) {
a = handleErrorOne(e1);
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