Functions
Learning how to create and use functions in TypeScript. I'll also discuss arrow functions, a great way to shorten your code and avoid issue's with "this" scope.
Understanding "this"
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Gentle explanation of this in JavaScript: https://rainsoft.io/gentle-explanation-of-this-in-javascript/
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Understanding Javascripts "this" with clarity and master it: http://javascriptissexy.com/understand-javascripts-this-with-clarity-and-master-it/