These are chat archives for camperbot/bonfire-return-largest-numbers-in-arrays

25th
Nov 2015
Anne Swedberg
@sweann
Nov 25 2015 22:17
hint
CamperBot
@camperbot
Nov 25 2015 22:17

hint [1/8]

## :construction: After this are possible spoiler hints.

Make sure you've tried to hard to solve it yourself before proceeding. :construction:

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Anne Swedberg
@sweann
Nov 25 2015 22:17
hint
CamperBot
@camperbot
Nov 25 2015 22:17

hint [2/8]

# Explanation:

You will get an array that contains sub arrays of numbers and you need to return an array with the largest number from each of the sub arrays.

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Anne Swedberg
@sweann
Nov 25 2015 22:19
hint
CamperBot
@camperbot
Nov 25 2015 22:19

hint [3/8]

Hint: 1

You will need to keep track of the array with the answer and the largest number of each sub-array.

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Anne Swedberg
@sweann
Nov 25 2015 22:20
hint
CamperBot
@camperbot
Nov 25 2015 22:20

hint [4/8]

Hint: 2

You can work with multidimensional arrays by Array[Index][SubIndex]

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Anne Swedberg
@sweann
Nov 25 2015 22:24
hint
CamperBot
@camperbot
Nov 25 2015 22:24

hint [5/8]

Hint: 3

Pay close attention to the timing of the storing of variables when working with loops

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Anne Swedberg
@sweann
Nov 25 2015 22:25
hint
CamperBot
@camperbot
Nov 25 2015 22:25

hint [6/8]

Spoiler Alert!

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Solutions ahead!

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Anne Swedberg
@sweann
Nov 25 2015 22:25
hint
CamperBot
@camperbot
Nov 25 2015 22:25

hint [7/8]

Solution 1:

function largestOfFour(arr) {
  var results = [];
  for (var n = 0; n < arr.length; n++) {
    var largestNumber = 0;
    for (var sb = 0; sb < arr[n].length; sb++) {
      if (arr[n][sb] > largestNumber) {
        largestNumber = arr[n][sb];
      }
    }

    results[n] = largestNumber;
  }

  return results;
}

Code Explanation:

  • Create a variable to store the results as an array.
  • Create an outer loop to iterate through the main array.
  • Before going into the inner loop, create a variable to hold the largest number. This must be outside the inner loop.
  • Create another for loop to work with the sub-arrays.
  • Check if the element of the sub array is larger than the current largest number. If so, then save the number.
  • After the inner loop, save the largest number in the variable for the results.

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