| 1 | /**
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| 2 | * Working with value pairs.
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| 3 | *
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| 4 | * @module pair
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| 5 | */
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| 6 |
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| 7 | /**
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| 8 | * @template L,R
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| 9 | */
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| 10 | export class Pair {
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| 11 | /**
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| 12 | * @param {L} left
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| 13 | * @param {R} right
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| 14 | */
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| 15 | constructor (left, right) {
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| 16 | this.left = left
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| 17 | this.right = right
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| 18 | }
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| 19 | }
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| 20 |
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| 21 | /**
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| 22 | * @template L,R
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| 23 | * @param {L} left
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| 24 | * @param {R} right
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| 25 | * @return {Pair<L,R>}
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| 26 | */
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| 27 | export const create = (left, right) => new Pair(left, right)
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| 28 |
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| 29 | /**
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| 30 | * @template L,R
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| 31 | * @param {R} right
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| 32 | * @param {L} left
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| 33 | * @return {Pair<L,R>}
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| 34 | */
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| 35 | export const createReversed = (right, left) => new Pair(left, right)
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| 36 |
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| 37 | /**
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| 38 | * @template L,R
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| 39 | * @param {Array<Pair<L,R>>} arr
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| 40 | * @param {function(L, R):any} f
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| 41 | */
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| 42 | export const forEach = (arr, f) => arr.forEach(p => f(p.left, p.right))
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| 43 |
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| 44 | /**
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| 45 | * @template L,R,X
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| 46 | * @param {Array<Pair<L,R>>} arr
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| 47 | * @param {function(L, R):X} f
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| 48 | * @return {Array<X>}
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| 49 | */
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| 50 | export const map = (arr, f) => arr.map(p => f(p.left, p.right))
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