Array Utils

array.ts

// note: the existing item needs to appear after so that this can put stuff at the start of the array
// note: if an i > length is used, it will just be added to the last place
const insertAt = <T>(arr: T[], i:number, item: T) =>
	arr.slice(0, i).concat([item]).concat(arr.slice(i)); // prettier-ignore

const removeAt = <T>(arr: T[], i: number) =>
	arr.slice(0, i).concat(arr.slice(i + 1)) // prettier-ignore

const setAt = <T>(arr: T[], i: number, item: T) =>
	arr.slice(0, i).concat([item]).concat(arr.slice(i + 1)); // prettier-ignore

const splitArrayAt = <T>(i: number, arr: T[]) => [arr.slice(0, i), arr.slice(i)]

const toggleArrayValue = <T>(array: T[], value2toggle: T) => {
	if (!array.includes(value2toggle)) return array.concat([value2toggle]);
	return array.filter((value) => value !== value2toggle);
};