javascriptType errorMedium

Validation passing empty strings

Time: 0:00

What it should do

countZeros(values) should count how many entries are the number zero, so countZeros([0, "", false, 0]) returns 2.

What goes wrong

countZeros([0, "", false, 0]) returns 4 — empty strings and false are being counted as zero.

Hints

This is a type errors bug

Totals that concatenate, sorts that put 10 before 9, comparisons that refuse to run.