Get all number pairs which [[a, b], a * b = value], for a given value

allMultiplierPairsOfArr.js

/**
 * ES6 and featured code
 */
let combineGetters = (...getters) => state => getters.reduce(({ payload }, getter) => ({ payload: getter(state, payload) }), { payload: state });

let findPairsInSorted = arr => value => {
  let results = [];
  let len = (arr && arr.length) || 0;
  if (len < 1) {
    return results;
  }
  for (let i = 0, j = len - 1; i < j;) {
    if (value % arr[i] !== 0) {
      i++;
    }
    else if (value / arr[i] < arr[j]) {
      j--;
    }
    else if (value / arr[i] > arr[j]) {
      i++;
    }
    else {
      results.push([arr[i], arr[j]]);
      i++;
      j--;
    }
  }
  return results;
};
 
let solve = arr => value => {
  let {negative = [], mixed = [], zeroBased = [], positive = []} = combineGetters(
    (state, payload) => payload.sort((a, b) => a - b), 
    (_, payload) => {
      if (value > 0) {
        return { 
          positive: findPairsInSorted(payload.filter(a => a > 0))(value), 
          negative: findPairsInSorted(payload.filter(a => a < 0))(value) 
        };
      }
      if (value < 0) {
        return {
	  mixed: findPairsInSorted([
	    ...payload.filter(a => a < 0).reverse(), 
	    ...payload.filter(a => a > 0) 
         ])(value)
        };
      }
      return {
        zeroBased: payload.filter(a => a !== 0).map(a => a < 0 ? [a, 0] : [0, a])
      };
    }
  )(arr).payload;
  return [...negative, ...mixed, ...zeroBased, ...positive];
};

solve([ 3, 4, 5, -2, 10, 11, 12, -1, 0, 7, 8 ])(10);
solve([ 10, 1, -1, -10, 0 ])(-10);
solve([ 1, 18, 3, 6, 9, 2 ])(18);
solve([ 10, 1, -1, -10, 0 ])(0);