Search engine optimization (SEO) has evolved so much in the past few years that many of the key performance indicators (KPIs) traditionally used to identify organic search success need to be replaced.
Arrays Arrays are the main tool in JavaScript. They use contiguous memory. This allows you to access any element by its index instantly. - push: Adds an element to the end. - unshift: Adds an element ...
Map → key-value with ANY key type (objects, functions, numbers) Set → collection of UNIQUE values (no duplicates) When to use? • Map for caches, dictionaries, dynamic keys • Set for tags, unique IDs, ...
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