javascriptNull / UndefinedMedium

Function crashing when item not found

Time: 0:00

What it should do

priceOf(items, name) should return the named item's price, or 0 when there is no such item.

What goes wrong

priceOf([{name:"a",price:5}], "b") throws "Cannot read properties of undefined (reading 'price')" instead of returning 0.

Hints

This is a null and undefined errors bug

Cannot read properties of undefined, NoneType has no attribute, NaN appearing from nowhere.