I have to write a function, organizeItems, that organizes items by category. The argument to the function is an array of item objects. Each item object has 3 properties, category (string), itemName (string), and onSale (Boolean).
var itemData = [
{ category: 'fruit', itemName: 'apple', onSale: false },
{ category: 'canned', itemName: 'beans', onSale: false },
{ category: 'canned', itemName: 'corn', onSale: true },
{ category: 'frozen', itemName: 'pizza', onSale: false },
{ category: 'fruit', itemName: 'melon', onSale: true },
{ category: 'canned', itemName: 'soup', onSale: false },
];
The return value should be an object with category properties. Each property value is an array of items that belong to that category and having onSale set to true should have '($)' appended to their item name. This is an example of what I'm trying to do:
{
fruit: ['apple', 'melon($)'],
canned: ['beans', 'corn($)', 'soup'],
frozen: ['pizza']
};
So far this is what I have:
var codeObj = {};
for(var i = 0; i < itemData.length; i++){
for(key in itemData[i]){
codeObj[itemData[i].category] = Object.values([itemData[i].itemNames])
This is what was outputted to the console:
{ fruit: [ undefined ], canned: [ undefined ], frozen: [ undefined ] }
Hello I did it like so.
const obj = {};
itemData.map((item, index) => {
let objKeys = Object.keys(item);
objKeys.forEach((k) => {
if (k === "category") {
if (!obj[item[k]]) {
obj[item[k]] = [];
}
if (!obj[item[k]].find((i) => i === item.itemName)) {
obj[item[k]].push(
item.onSale ? `${item.itemName}($)` : item.itemName
);
}
}
});
});
console.log("obj", obj);
my way
const itemData =
[ { category: 'fruit', itemName: 'apple', onSale: false }
, { category: 'canned', itemName: 'beans', onSale: false }
, { category: 'canned', itemName: 'corn', onSale: true }
, { category: 'frozen', itemName: 'pizza', onSale: false }
, { category: 'fruit', itemName: 'melon', onSale: true }
, { category: 'canned', itemName: 'soup', onSale: false }
]
const result = itemData.reduce((r,{category,itemName,onSale})=>
{
r[category] = r[category] || []
r[category].push( itemName + (onSale?'($)':''))
return r
},{})
// show result
console.log( JSON.stringify(result)
.replace(`{"`,`\nresult =\n { `)
.replace(/"],"/g,`' ]\n , `)
.replace(`"]}`,`' ]\n }`)
.replace(/":\["/g,`: [ '`)
.replace(/","/g,`', '`)).as-console-wrapper {max-height: 100%!important;top:0 }This solution works
function organizeItems(itemData) {
let obj = {}
for(i=0; i<itemData.length; i++) {
let item = itemData[i]
for(key in item) {
if(key === 'category') {
if(!obj[item[key]]) {
obj[item[key]] = []
}
if(obj[item[key]]) {
obj[item[key]].push(item.onSale ? `${item.itemName}($)` : `${item.itemName}`)
}
}
}
}
return obj
}