JS Snippets: Array of Objects: Difference between revisions

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     }
     }
];
];
</syntaxhighlight><syntaxhighlight lang="shell" class="code-continue">
airlines-podcast-data.mjs
</syntaxhighlight><syntaxhighlight lang="javascript">
export default [
    {
        id: 1,
        title: "Scrimba Podcast",
        duration: 50,
        tags: ["education", "jobs", "technology"],
        hosts: ["Alex Booker"],
        rating: 10,
        genre: "education",
        paid: false
    },
    {
        id: 2,
        title: "Crime Fan",
        duration: 150,
        tags: ["crime", "entertainment", "mature"],
        hosts: ["Bob Smith", "Camilla Lambert"],
        genre: "true crime",
        rating: 5,
        paid: true
    },
    {
        id: 3,
        title: "Mythical Creatures",
        duration: 99,
        tags: ["entertainment", "general", "unicorns"],
        hosts: ["Esmerelda Shelley", "Duke Dukington", "Felix the Cat"],
        genre: "fantasy",
        rating: 8,
        paid: true
    },
    {
        title: "Crime Crime Crime",
        duration: 70,
        tags: ["crime", "entertainment", "mature"],
        hosts: ["Jessica Jones", "Humphrey Bogart", "Inspector Gadget"],
        genre: "true crime",
        rating: 6,
        paid: true
    },
    {
        title: "Something about Witches",
        duration: 35,
        tags: ["fantasy", "entertainment"],
        hosts: ["Frewin Wyrm", "Evanora Highmore"],
        genre: "fantasy",
        rating: 8,
        paid: false
    },
    {
        title: "Coding Corner",
        duration: 55,
        tags: ["education", "jobs", "technology"],
        hosts: ["Treasure Porth", "Guil Hernandez", "Tom Chant"],
        genre: "education",
        rating: 9,
        paid: false
    },
];
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</syntaxhighlight>


Revision as of 15:57, 11 March 2023

JavaScript

Ref­er­ences

Ex­am­ple da­ta files

product-data.mjs

export default [
    { product: "#1", type: "sweet",  price: 7.54 },
    { product: "#2", type: "savory", price: 2.55 },
    { product: "#3", type: "savory", price: 3.79 }
];

podcast-data.mjs

export default [
    {
        id: 1,
        title: "Stranger Scrims",
        duration: 40,
        tags: ["supernatural", "horror", "drama"],
    },
    {
        id: 2,
        title: "The Scrim of the Dragon",
        duration: 60,
        tags: ["drama", "fantasy"],
    },
    {
        id: 3,
        title: "Scrim Hunters",
        duration: 22,
        tags: ["reality", "home improvement"],
    }
];

airlines-podcast-data.mjs

export default [
    {
        id: 1,
        title: "Scrimba Podcast",
        duration: 50,
        tags: ["education", "jobs", "technology"],
        hosts: ["Alex Booker"],
        rating: 10,
        genre: "education",
        paid: false
    },
    {
        id: 2,
        title: "Crime Fan",
        duration: 150,
        tags: ["crime", "entertainment", "mature"],
        hosts: ["Bob Smith", "Camilla Lambert"],
        genre: "true crime",
        rating: 5,
        paid: true
    },
    {
        id: 3,
        title: "Mythical Creatures",
        duration: 99,
        tags: ["entertainment", "general", "unicorns"],
        hosts: ["Esmerelda Shelley", "Duke Dukington", "Felix the Cat"],
        genre: "fantasy",
        rating: 8,
        paid: true
    },
    {
        title: "Crime Crime Crime",
        duration: 70,
        tags: ["crime", "entertainment", "mature"],
        hosts: ["Jessica Jones", "Humphrey Bogart", "Inspector Gadget"],
        genre: "true crime",
        rating: 6,
        paid: true
    },
    {
        title: "Something about Witches",
        duration: 35,
        tags: ["fantasy", "entertainment"],
        hosts: ["Frewin Wyrm", "Evanora Highmore"],
        genre: "fantasy",
        rating: 8,
        paid: false
    },
    {
        title: "Coding Corner",
        duration: 55,
        tags: ["education", "jobs", "technology"],
        hosts: ["Treasure Porth", "Guil Hernandez", "Tom Chant"],
        genre: "education",
        rating: 9,
        paid: false
    },
];

Sort Ob­jects by a Prop­er­ty (Price)

import products from "./product-data.mjs";

function sortProducts(data: { product: string, type: string, price: number }[]) {
    return data.sort((a, b) => a.price - b.price);
}

Re­duce the prices in­to a Sum

import products from "./product-data.mjs";

function sumPrices(data: { product: string, type: string, price: number }[]) {
    return parseFloat(
        data.reduce((acc, { price }) => acc + price, 0)
    ).toFixed(2);
}

Re­duce the prices of cer­tain prod­uct type in­to a Sum

import products from "./product-data.mjs";

function sumPrices(data: { product: string, type: string, price: number }[]) {
    return parseFloat(
        data
            .filter(({ type }) => type === "savory")
            .reduce((acc, { price }) => acc + price, 0)
    ).toFixed(2);
}

Fil­ter the Ob­jects by a Prop­er­ty and Map a new Ar­ray

import products from "./product-data.mjs";

function sumPrices(data: { product: string, type: string, price: number }[]) {
    return data
            .filter(({ type }) => type === "savory")
            .map(({ item, price }) => ({ item, price }));
}

Get unique Tags from Pod­cast-da­ta

import products from "./podcast-data.mjs";

function getUniqueTagsForInLoop(data) {
    const unqTagsTrack = {};
    const unqTagsList = [];

    data
        .map(({ tags }) => tags)
        .flat().forEach(tag => {
            unqTagsTrack[tag] = true;
        });

    for (const key in unqTagsTrack) {
        unqTagsList.push(key);
    }

    return unqTagsList;
}

import products from "./podcast-data.mjs";

function getUniqueTagsWithFilter(data) {
    const unqTagsTrack = {};

    return data
        .map(({ tags }) => tags)
        .flat()
        .filter(tag => {
            if (!unqTagsTrack[tag]) {
                unqTagsTrack[tag] = true;
                return true;
            }
            return false;
        });
}
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