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this one uses the String() constructor, spread syntax (...), and more kata link: ... reworked version: this one's got Array.from(), map(), and parseInt() this one uses the push(), slice(), and filter() methods push() info: ... this one uses the conditional (ternary) operator and the Boolean() constructor kata link: ... very slick example of split(), map(), join() methods and more. Join me as I teach you the assembly programming language by doing

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Codewars 8 kyu Opposite Number JavaScript
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Codewars 8 kyu Opposite Number JavaScript

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all this needs is a hyphen.

Opposite Number | JavaScript -Codewars
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Opposite Number | JavaScript -Codewars

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In this video, we're solving the "

Codewars - Javascript - Opposite number
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Codewars - Javascript - Opposite number

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Code along with me as we solve '

Codewars: Opposite number (8 kyu) TDD in JavaScript
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Codewars: Opposite number (8 kyu) TDD in JavaScript

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Last Updated: May 28, 2026

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