Compare two sorted arrays, and map the items of the first map to matched ones.

$ npm install array-map-sorted

import map from 'array-map-sorted'

const args = [
  [
    // 1 matches 4
    1,
    // 2 starts to match from 5 (4 has already been matched), and no matches
    2,
    // 3 starts to match from 5, and matches 9
    3
  ],
  [4, 5, 7, 9],
  (a, b) => b % a === 0
]

map(...args)
// [4, undefined, 9]

map(...args, 0)
// [4, 0, 9]

map(...args, 0, (datum, rel) => datum + rel)
// [5, 0, 12]

• data Array<datum> the array to be mapped
• relative Array<rel> which each datum of data will be matched with.
• matcher function(datum, rel, datum_i, rel_i): boolean the matcher function
• defaultValue any=undefined if there is no match, the datum will be mapped to defaultValue
• mapper function(datum, rel, datum_i, rel_i): any if there is a match, mapper returns the value which the datum to be mapped into. By default, mapper is (datum, rel) => rel.

Returns Array

MIT