Lodash dropWhile exercise not dropping the right number of elements

Get Help JavaScript
#1

Hi there,

Trying to slog through the lodash exercise and it seems my code is calculating the wrong dropNumber or something?
This is my first post - I did try to search for a solution, but I couldn’t find one - and I don’t know if I’m formatting the question properly!

dropWhile(array, predicate) {
      let dropNumber = array.findIndex((element, index) =>{!predicate(element, index, array)});
      let newArray = this.drop(array, dropNumber);
      return newArray
    },

The error message I get is…
_.dropWhile() Tests:
1 - _.dropWhile() is defined - Passed!
2 - Returns an array - Passed!
3 - Drops elements until predicate function returns falsy - Failed: _.dropWhile([1, 2, 0, 4], indexIsSmallerThanElement returned [ 4 ] instead of [ 0, 4 ].

I’m not sure why this is happening - I’m sure it’s got something to do with 0 indexing or something - or I’ve somehow made it drop the element and then return the rest, instead of keeping the element which is the trigger?

Thanks,

m

#2

Missing explicit return inside the curly braces. Remove the braces to gain implicit return.

#3

ahhh! Many thanks.

What should I add inside the braces to make the return explicit? Obviously it’s easier to remove them and just do the implicit thing, but I think I would learn more by knowing the answer to that question.

:slight_smile:

#4 
... => {
  return !...
}

When braces are included we have to use ES5 syntax.

1 Like