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Learn what generators are and understand how do they work and how to use them. · In JavaScript, when a function is called, it executes the code within...
Understand what a lexical scoping is and what closures are. · Lexical Scope Before getting to closures, you have to be familiar with lexical scopes. If...
A variable is simply a container that holds a certain value and keeps it in the memory. The value might be a string, a number, etc... So a variable is...