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JavaScript

Doing some Javascript problems and this is the only one I can't seem to figure out. Any help would be amazing. Thanks.

function lastLetterSort(stringArray) { function byLastLetter(a, b) { //TODO: Sort the strings in alphabetical // order using their last letter // Read this about how the sort function works: // this byLastLetter function is a "compare function" // And check out the "comparing strings" section here: } stringArray.sort(byLastLetter); }

function sumArray(numberArray) { var sum = 0; // TODO: implement me using forEach return sum; }

function sumSort(arrayOfArrays) { arrayOfArrays.sort(function(item) { // TODO: implement me using sumArray // order the arrays based on the sum of the numbers // inside each array }); }

1 Answer

Steven Parker
Steven Parker
215,939 Points

It looks like you have several problems here. Which one are you stuck on?

Here's one of them, just in case (or to get you started):

function sumArray(numberArray) {
  var sum = 0;
  numberArray.forEach(function(n){
    sum += n;
  })
  return sum;
}

:information_source: I should point out that .forEach() is less efficient than an ordinary for loop and indexing.

I didn't notice that. sorry man. I was stuck on sumArray but that helps. Thank you.