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const itemToBuy= {
bread :{
isAvailable: false,
quantityToBuy: 2
},
egg: {
isAvailable: true,
quantityToBuy: 0
},
tomatoes:{
isAvailable: false,
quantityToBuy:12
}
}
for (var key in itemToBuy) {
const items = itemToBuy[key];
for(prop in items){
if(items[prop]===false){
console.log(key)
}
}
}