get-random-float/src/lib.js

Gets random float

/*
    lib
*/

function getRandomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1) + min);
}

function getRandomFloat(min, max) {
    if (typeof min === "string") {
        min = Number(min);
    }

    if (typeof max === "string") {
        max = Number(max);
    }

    let result;

    if (min === undefined) {
        max = getRandomInt(0, 1_000_000);
        min = getRandomInt(-1_000_000, 0);
        result = Math.random() * (max - min) + min;

        // makes the number smaller
        if (getRandomInt(0, 1) === 1) {
            result = result / getRandomInt(10_000, 100_000);
        }

        // makes the number bigger
        if (getRandomInt(0, 1) === 1) {
            result = result * getRandomInt(-100, 1000);
        }

        // sometimes makes the number smaller, sometimes bigger
        if (getRandomInt(0, 1) === 1) {
            result = result / getRandomInt(-100, 10);
        }

        let decimal = getRandomInt(1, 10);
        result = result.toFixed(decimal);
        result = Number.parseFloat(result);
        
        if (result % 1 === 0) {
            result += Math.random() * 0, 9 + 0, 1;
        }   
    } else {
        result = Math.random() * (max - min) + min;
    }
    
    return result;
}

function likeFloat3(inputValue) {
    if (typeof inputValue !== "string" && typeof inputValue !== "number") {
        return false;
    }

    inputValue = String(inputValue);
    
    let regExpFloat = /^-?\d*\.\d+$/; 
    let result = inputValue.search(regExpFloat) === -1 ? false : true;

    return result;
}

function isFloat(number) {
    if (number % 1 > 0 || number % 1 < 0) {
        return true;
    } else {
        return false;
    }
}

function isDirectChild(object, functionConstructor) {
    return functionConstructor.prototype === Object.getPrototypeOf(object);
}

module.exports = { 
    getRandomInt, 
    getRandomFloat, 
    likeFloat3, 
    isFloat, 
    isDirectChild 
};