Thinkful_Array_Loop_Drill

Average.js

// noprotect
// ^^ `noprotect` is here to prevent a bug with jsbin and for loops.

function average(numbers) {
  // your code goes here
  var sum = 0;
  for(var i in numbers)
  {
     sum += numbers[i];
  }
  return sum/numbers.length;
}




/* From here down, you are not expected to 
   understand.... for now :)  
   
   
   Nothing to see here!
   
*/


// tests

function testFunctionWorks(fn, input, expected) {
  if (fn(input) === expected) {
    console.log('SUCCESS: `' + fn.name + '` works on `[' + input + ']`');
    return true;
  }
  else {
    console.log(
      'FAILURE: `' + fn.name + '([' + input + '])` should be ' + expected +
      ' but was ' + fn(input)
    );
    return false;
  }
}

(function runTests() {
  var numList1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
  var correctAns1 = 5.5;
  var numList2 = [0, -1, 1];
  var correctAns2 = 0;
  
  var testResults = [
    testFunctionWorks(average, numList1, correctAns1),
    testFunctionWorks(average, numList2, correctAns2)
  ];
  var numPassing = testResults.filter(function(result){ return result; }).length;
  console.log(numPassing + ' out of ' + testResults.length + ' tests passing.')
})();

FizzBuzz.js

// noprotect
// ^^ `noprotect` is here to prevent a bug with jsbin and for loops.


function fizzBuzz(countTo) {
  // your code here
  var arr = [];
  for(var x = 1; x <= countTo; x++)
  {
     if(x%3==0 && x%5==0)
       arr.push('fizzbuzz');
     else if(x%3==0)
       arr.push('fizz');
     else if(x%5==0)
       arr.push('buzz');
     else
       arr.push(x);
  }
  return arr;
}




/* From here down, you are not expected to 
   understand.... for now :)  
   
   
   Nothing to see here!
   
*/



// tests
(function testFizzBuzz() {
  // we'll use the variables in our test cases
  var countTo = 16;
  var expected = [
    1, 2, 'fizz', 4, 'buzz', 'fizz', 7, 8, 'fizz',
    'buzz', 11, 'fizz', 13, 14, 'fizzbuzz', 16
  ];

  var actual = fizzBuzz(countTo) || [];
  
  if (
    expected.length === actual.length &&
    expected.every(function(item, index) {
      return actual[index] === item;}) ) {
    
      console.log('SUCCESS: fizzBuzz is working');
  }
  else {
    console.log('FAILURE: fizzBuzz is not working');
  }  
})();

MaxMin.js

// noprotect
// ^^ `noprotect` is here to prevent a bug with jsbin and for loops.



function max(numbers) {
 // your code here
 var max_sum = Number.MIN_SAFE_INTEGER;
  for(var x = 0; x < numbers.length; x++)
  {
    max_sum = Math.max(numbers[x],max_sum);
  }
  return max_sum;
}


function min(numbers) {
 // your code here
  var min_sum = Number.MAX_SAFE_INTEGER;
  for(var x = 0; x < numbers.length; x++)
  {
    min_sum = Math.min(numbers[x],min_sum);
  }
  return min_sum;
}



/* From here down, you are not expected to 
   understand.... for now :)  
   
   
   Nothing to see here!
   
*/


// tests

function testFunctionWorks(fn, input, expected) {
  if (fn(input) === expected) {
    console.log('SUCCESS: `' + fn.name + '` works on `[' + input + ']`');
    return true;
  }
  else {
    console.log(
      'FAILURE: `' + fn.name + '([' + input + '])` should be ' + expected +
      ' but was ' + fn(input)
    );
    return false;
  }
}


(function runTests() {
  // we'll use the variables in our test cases
  var numList1 = [-5, 28, 98, -20013, 0.7878, 22, 115];
  var realMin1 = numList1[3];
  var realMax1 = numList1[6];
  var numList2 = [0, 1, 2, 3, 4];
  var realMin2 = numList2[0];
  var realMax2 = numList2[4];
  
  var testResults = [
    testFunctionWorks(max, numList1, realMax1),
    testFunctionWorks(max, numList2, realMax2),
    testFunctionWorks(min, numList1, realMin1),
    testFunctionWorks(min, numList2, realMin2),
  ];
  
  var numPassing = testResults.filter(function(result){ return result; }).length;
  console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
})();