Javascript Interview Question Number Make Coin Changes

Introduction

Given an input number representing value and an input array representing available coin denominations, return all possible ways to make change for the given amount.

You may assume the coins are ordered in value from smallest to largest.

Example: 

makeChange(25, [5, 10, 25]) should return [[5,5,5,5,5], [5,5,5,10], [5, 10, 10], [25]]

Test cases 

function makeChange (value, coins) {

}
/*  Do not edit below this line */
var line = '****************************************************************';
var passed = 0;//from   w  w  w . jav  a2  s .c o  m
var failed = 0;

console.log(line);
console.log('makeChange UNIT TESTS');
console.log(line);

if (JSON.stringify(makeChange(23, [5, 10, 25])) === JSON.stringify([])) {
    console.log("Test 1 pass, makeChange(23, [5, 10, 25]) returns []");
    passed += 1;
} else {
    console.log("Test 1 failed, makeChange(23, [5, 10, 25]) should return []");
    failed += 1;
}

var changes = makeChange(25, [5, 10, 25]);
var acceptedResult = JSON.stringify([[5, 5, 5, 5, 5], [10, 5, 5, 5], [10, 10, 5], [25]].sort());
var acceptedResult2 = JSON.stringify([[5, 5, 5, 5, 5], [5, 5, 5, 10], [5, 10, 10], [25]].sort());

if ((JSON.stringify(changes.sort()) === acceptedResult) || (JSON.stringify(changes.sort()) === acceptedResult2))  {
    console.log("Test 2 pass, makeChange(25, [5, 10, 25]) returns all the elements in [[5,5,5,5,5], [5,5,5,10], [5, 10, 10], [25]]");
    passed += 1;
} else {
    console.log("Test 2 failed, makeChange(25, [5, 10, 25]) should returns all the elements in [[5,5,5,5,5], [5,5,5,10], [5, 10, 10], [25]]");
    failed += 1;
}

console.log(line);
console.log('TOTAL TESTS PASSED: ' + passed );
console.log('TOTAL TESTS FAILED: ' + failed );
console.log(line);



function resultsInclude(results, result) {
    for (var i = 0; i < results.length; i += 1) {
        var currentResult = results[i];

        if (currentResult.length == result.length) {
            var isMatch = true;

            for (var j = 0; j < result.length; j += 1) {
                if (result[j] !== currentResult[j]) isMatch = false;
            }

            if (isMatch) return true;
        }
    }

    return false;
}

function makeChange (value, coins) {
    var results = [];
    var coinCombos = [[]];
    var values = [value];

    while (values.length > 0) {
        var currentCombo = coinCombos.pop();
        var currentValue = values.pop();
 
        for (var i = 0; i < coins.length; i += 1) {
            var newCombo = (currentCombo.concat([coins[i]])).sort();
            
            if (currentValue > coins[i]) {
                values.push(currentValue - coins[i]);
                coinCombos.push(newCombo);
            } else if (currentValue === coins[i]) {
                if (resultsInclude(results, newCombo) === false) results.push(newCombo);
            }
        }
    }

    return results;
}
/*  Do not edit below this line */
var line = '****************************************************************';
var passed = 0;
var failed = 0;

console.log(line);
console.log('makeChange UNIT TESTS');
console.log(line);

if (JSON.stringify(makeChange(23, [5, 10, 25])) === JSON.stringify([])) {
    console.log("Test 1 pass, makeChange(23, [5, 10, 25]) returns []");
    passed += 1;
} else {
    console.log("Test 1 failed, makeChange(23, [5, 10, 25]) should return []");
    failed += 1;
}

var changes = makeChange(25, [5, 10, 25]);
var acceptedResult = JSON.stringify([[5, 5, 5, 5, 5], [10, 5, 5, 5], [10, 10, 5], [25]].sort());
var acceptedResult2 = JSON.stringify([[5, 5, 5, 5, 5], [5, 5, 5, 10], [5, 10, 10], [25]].sort());

if ((JSON.stringify(changes.sort()) === acceptedResult) || (JSON.stringify(changes.sort()) === acceptedResult2))  {
    console.log("Test 2 pass, makeChange(25, [5, 10, 25]) returns all the elements in [[5,5,5,5,5], [5,5,5,10], [5, 10, 10], [25]]");
    passed += 1;
} else {
    console.log("Test 2 failed, makeChange(25, [5, 10, 25]) should returns all the elements in [[5,5,5,5,5], [5,5,5,10], [5, 10, 10], [25]]");
    failed += 1;
}

console.log(line);
console.log('TOTAL TESTS PASSED: ' + passed );
console.log('TOTAL TESTS FAILED: ' + failed );
console.log(line);



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