johnislarry

'use strict';

function swiftney_impl(nums, expr, goal) {
  if (goal === eval(expr) && nums.length === 0) {
    console.log(`${expr} = ${goal}`);
  }
  if (nums.length > 0) {
    const num = nums[0];
    ['+', '-', '*', '/'].forEach(op => swiftney_impl(nums.slice(1), `(${expr}${op}${num})`, goal));
  }