Tobias Szczepanski 70853n

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70853n / .js

Created October 1, 2020 10:13

JavaScript range array and object with calculated keys

	const upperRangeBoundry = 5;

	const rangeSizedArray = [...Array(upperRangeBoundry)]
	// -> (5) [undefined, undefined, undefined, undefined, undefined]

	const rangeValuedArray = [...Array(upperRangeBoundry).keys()]
	// -> (5) [0,1,2,3,4]

	[...Array(8)].map((_, index, range) => 100 * index/range.length);
	// -> (8) [0, 12.5, 25, 37.5, 50, 62.5, 75, 87.5]