Change gallery item descriptions with javascript code

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For any poor soul who is banging their head on their keyboard, this is how you update something in a gallery after it loads from a dataset.

$w.onReady(function () {
    $w('#dataset1').onReady(() => {
 let items = $w('#gallery1').items

 for (let item of items){
 if (item.description === '0'){
                item.description = 'POA'
 let itemNew = item
                items.pop(item)
                items.push(itemNew)
            }
        }
        $w('#gallery1').items = items;
    })
})