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JavaScript Introducing the Practice

Aaron Thomas
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Aaron Thomas
Full Stack JavaScript Techdegree Student 13,189 Points
Posted by Aaron Thomas
.a{fill-rule:evenodd;}techdegree
Aaron Thomas
Full Stack JavaScript Techdegree Student 13,189 Points

arrow function vs named function

when i use the following i get 'undefined':

function reverseString(string) { [...string].reverse().join('') };

but when i use this it works:

const reverseString = (string) => [...string].reverse().join('');

why is that?

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

You forgot the "return" in the named function:

function reverseString(string) { return [...string].reverse().join(''); };

The return is implicit in the shorthand form of an arrow function.