filter vs forEach about es6-equivalents-in-es5

[cliffordfajardo]

@gaboesquivel - good eye here. Both examples are essentially doing the same thing, but the main differences I see with the two examples are:

• forEach is being used a side effect function (since it doesn't actually return anything), so we have to create an outer variable to store our results
• filter does actually return something (the transformed array) so we can just save the results of filter directly to the fives variable.

[dashed]

imo, filter is more appropriate b/c you generally want to avoid side-effects.

[gaboesquivel]

Just realized that's intended to be an difference between statement bodies. Filter is an expression since it returns a value, just as map in the example lines above.