Polyfills in JavaScript | ( forEach, map, filter, reduce ,reduceRight and flat )

Here's an in depth tutorial on how to implement forEach, map, filter, flat, reduce and reduceRight functions in JavaScript from scratch. This video will teach you the patterns on how to approach creating polyfills of any function and it will also give you in-depth knowledge about how these functions actually work behind the scenes.

Link (polyfill for forEach, map, filter, reduce, reduceRight, flat)- https://www.youtube.com/watch?v=YfZb_1MPUCY

Link (polyfill for flat)- https://www.youtube.com/watch?v=pTVdymFMTkA

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