bad positive coord float compression

algo.js

// use geohash instead!

function encodePositiveFloat(number) {
    return compressInt(number
        .toString()
        .indexOf('.')
        .toString()
        .concat(number
            .toString()
            .replace(".", "")));
}
function decodePositiveFloat(str) {
    let d = decompressInt(str);
    let i = parseInt(d.slice(0,1), 10);
    return parseFloat(d.slice(1,i+1) + "." + d.slice(i+1));
}
function compressInt(integer) {
    let num = 4;
    let str = integer.toString();
    let len = str.length;
    return str
        .padEnd(len + (num-(len % num)) % num, '0')
        .match(new RegExp(".{"+num+"}","g"))
        .map((str) => String.fromCharCode(str))
        .join('');
}
function decompressInt(str) {
    return str
        .split('')
        .map((chr) => chr.charCodeAt(0).toString().padStart(4, '0'))
        .join('');
}

const coordinates = [
    59.012529932141405,
    5.825963706152152,
    58.900780849517250,
    5.634868640551076
];


const param = coordinates.map(encodePositiveFloat).join(String.fromCharCode(10000));
console.log(param);
param
    .split(String.fromCharCode(10000))
    .forEach(coord => console.log(decodePositiveFloat(coord)));