| title | excerpt |
|---|---|
Arity |
the number of arguments of a function |
Arity (from Latin) is the term used to refer to the number of arguments or operands in a function or operation, respectively. You're most likely to come across this word in the realm of JavaScript when it’s used to mention the number of arguments expected by a JavaScript function.
There’s even a property named arity, of the Function object that returns the number of expected arguments in a function. It’s now obsolete though and replaced by length.
As an example, the following function has an arity of 3.
function getName(first, middle, last) {
return first + ' ' + middle + ' ' + last;
}Source: https://gist.github.com/nucliweb/8de961282f64095b1a57.