Comments (2)
Another good reason to name a function, or to save some intermediate result in a named variable, is that it gives a free opportunity to describe your intent, if you're somewhat good with descriptive naming. Very useful for future maintenance programmers, probably your future self.
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From https://hackernoon.com/how-to-make-the-fastest-promise-library-f632fd69f3cb
Avoid creating unnecessary variables, functions and instances
Following this principle helps avoiding unnecessary memory allocations. For example
function sum(array) {
return array.reduce(function iterator(result, num) {
return result + num;
});
}
sum([1, 2, 3]); // 6
When sum is called, the iterator function is always created. It is one of unnecessary memory allocations. The code is rewritten to follow next example.
function iterator(result, num) {
return result + num;
}
function sum(array) {
return array.reduce(iterator);
}
sum([1, 2, 3]); // 6
The code avoids making unnecessary functions.
from js-mythbusters.
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