51 lines
885 B
JavaScript
51 lines
885 B
JavaScript
/**
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* Working with value pairs.
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*
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* @module pair
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*/
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/**
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* @template L,R
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*/
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export class Pair {
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/**
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* @param {L} left
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* @param {R} right
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*/
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constructor (left, right) {
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this.left = left
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this.right = right
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}
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}
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/**
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* @template L,R
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* @param {L} left
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* @param {R} right
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* @return {Pair<L,R>}
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*/
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export const create = (left, right) => new Pair(left, right)
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/**
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* @template L,R
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* @param {R} right
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* @param {L} left
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* @return {Pair<L,R>}
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*/
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export const createReversed = (right, left) => new Pair(left, right)
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/**
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* @template L,R
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* @param {Array<Pair<L,R>>} arr
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* @param {function(L, R):any} f
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*/
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export const forEach = (arr, f) => arr.forEach(p => f(p.left, p.right))
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/**
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* @template L,R,X
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* @param {Array<Pair<L,R>>} arr
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* @param {function(L, R):X} f
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* @return {Array<X>}
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*/
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export const map = (arr, f) => arr.map(p => f(p.left, p.right))
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