paginate.js

paginate.js

const json = {
    BTC: {
        name: "Bitcoin",
        symbol: "BTC",
        image: "https://shapeshift.io/images/coins/bitcoin.png",
        imageSmall: "https://shapeshift.io/images/coins-sm/bitcoin.png",
        status: "available"
    },
    "1ST": {
        name: "FirstBlood",
        symbol: "1ST",
        image: "https://shapeshift.io/images/coins/firstblood.png",
        imageSmall: "https://shapeshift.io/images/coins-sm/firstblood.png",
        status: "available"
    },
    ANT: {
        name: "Aragon",
        symbol: "ANT",
        image: "https://shapeshift.io/images/coins/aragon.png",
        imageSmall: "https://shapeshift.io/images/coins-sm/aragon.png",
        status: "available"
    }
};

function paging(src, per) {
    const res = [];
    const page = Math.ceil(src.length / per);

    for (const i = 0, j = 0; j < page; i = i + per, j++) {
        const tmp = src.slice(i, i + per);
        res.push(tmp);
    }

    return {
        paginate: res,
        pageCount: page
    };
}

function json2Array(src) {
    // Browser did JSON.parse() after AJAX done
    const keys = Object.keys(src)
    const res = []
    const len = keys.length
    for (let i = 0; i < len; i++) {
        let tmp = {}
        let key = keys[i]
        tmp[key] = src[key]
        res.push(tmp)
    }
    return res
}