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iamcerebrocerberus / #calculator.ts

Created June 26, 2025 00:42 — forked from tkrotoff/#calculator.ts

Calculator function using shunting yard algorithm and reverse Polish notation (RPN)

	// https://gist.github.com/tkrotoff/b0b1d39da340f5fc6c5e2a79a8b6cec0

	// WTF!
	// parseFloat('-0') => -0 vs parseFloat(-0) => 0
	// -0 === 0 => true vs Object.is(-0, 0) => false
	const minus0Hack = (value: number) => (Object.is(value, -0) ? '-0' : value);

	export const operators: {
	[operator: string]:
	\| {