Ordinal Numbers - PhillyDev Slack #daily_programmer - 20170228

dp20170228.js

/*
Today's daily programmer challenge is to print a marathon finishers
place in English. Your program should take an non decimal input
`getFinishPosition(11)` and return `11th place`, `getFinishPosition(21)`
and return `21st place`, `getFinishPosition(4)` and return `4th place`,
and `getFinishPosition(33)` and return `33rd place`.

Please DM me with ideas for future problems. When you have completed it
post a link to your solution. No need to go over 99 finishers, unless
you want to.
*/

function getFinishPosition_1(place) {
    let digit = place % 100;
    if (place > 3 && place < 14) {
        return place + "th place";
    }

    digit = place % 10;
    let placement = place;
    switch (digit) {
        case 1:
            placement += "st place";
            break;
        case 2:
            placement += "nd place";
            break;
        case 3:
            placement += "rd place";
            break;
        default:
            placement += "th place";
    }
    return placement;
}

function getFinishPosition_2(place) {
    let placement = place.toString();
    let lastDigit = parseInt(placement.slice(-1));
    let oridinalSuffix = ['th place', 'st place', 'nd place', 'rd place'];
    let specialCase = placement.match(/^([0-9]+?[2-90][123]|[123])$/);

    if (specialCase) {
        console.log(specialCase);
        placement += oridinalSuffix[lastDigit];
    } else {
        placement += oridinalSuffix[0];
    }
    return placement;
}

let getFinishPosition = getFinishPosition_1;

console.log(getFinishPosition(11));
console.log(getFinishPosition(21));
console.log(getFinishPosition(4));
console.log(getFinishPosition(33));

for (let i = 110; i < 115; i++) {
    console.log(getFinishPosition(i));
}