January 2020
Intermediate to advanced
470 pages
11h 13m
English
Content preview from Mastering JavaScript Functional Programming - Second Edition
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Arrow functions – the modern way
Even if the arrow functions work pretty much in the same way as the other functions, there are some important differences between them and the usual functions. Arrow functions can implicitly return a value even with no return statement present, the value of this is not bound, and there is no arguments object. Let's go over these three points.
There are some extra differences: arrow functions cannot be used as constructors, they do not have a prototype property, and they cannot be used as generators because they don't allow the yield keyword. For more details on these points, see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions#No_binding_of_this.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.