Higher-Order Functions
One ugly detail that, if you have any good taste at all, must be starting to bother you
is the endlessly repeated for
loop going over an array: for (var
i = 0; i < something.length; i++) ...
. Can this be abstracted?
The problem is that, whereas most functions just take some values, combine them, and
return something, these for
loops contain a piece of code that they must
execute. It is easy to write a function that goes over an array and prints out every
element:
function printArray(array) { for (var i = 0; i < array.length; i++) print(array[i]); }
But what if we want to do something else than print? Since âdoing somethingâ can be represented as a function and since functions are also values, we can pass our action as a ...
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