How to filter undefined value in javascript arrays?

Question

const values = dataSku.map(sku => {return map.skuInfo[sku].description})

Here, there is some posibility that map.skuInfo[sku] can be null/undefined and I need to filter it. How would it be possible ?

Answer 1

Sounds like you want .filter. It's a higher order function like .map.

const values = dataSku
    .filter(item => item.description !== undefined)

I'm not sure your exact data structure but check it out here! It filters out all non-truthy return values.

Answer 2

This will solve your problem -

const values = dataSku.map(sku => map.skuInfo[sku]}).filter(skuInfo => typeof skuInfo !== "undefined").map(skuInfo => skuInfo.description);