terbilang.js

const CENT = 0;
const POINT = 1;
const NOMINAL = Array("Nol", "Satu", "Dua", "Tiga", "Empat", "Lima", "Enam", "Tujuh", "Delapan", "Sembilan");
const THOUDELIM = ".";
const DECDELIM = ",";

function initCap_(str) {
    return str.toLowerCase().replace(/(?:^|\s)[a-z]/g, function (m) {
        return m.toUpperCase();
    });
};

function format_v2(s, r, curr) {
    s += "";
    regexp = /^(\d*\.\d+|\d+)$/gi

        if (regexp.test(s)) {
            s = s.replace(/^0+/gi, "");
            s = s.split(".");
            s[1] = Math.round(s[1] / Math.pow(10, s[1].length - r)) + "";
            var l = s[0].length;
            var t = "";
            var c = 0;
            if (l == 0) {
                s[0] = "0";
                l = 1;
            };
            while (l > 0) {
                t = s[0][l - 1] + (c % 3 == 0 && c != 0 ? THOUDELIM : "") + t;
                l--;
                c++;
            }
            s[1] = s[1] == undefined ? "0" : s[1];
            for (i = s[1].length; i < r; i++) {
                s[1] += "0";
            }
            return curr + t + DECDELIM + s[1];
        } else
            return "ERROR: Invalid number format";
}

function threedigit(word) {
    while (word.length < 3) {
        word = ("0000000" + word).slice(-3);
    }
    word = word.split("");
    a = word[0];
    b = word[1];
    c = word[2];
    word = "";
    word += (a != "0" ? (a != "1" ? NOMINAL[parseInt(a)] : "Se") : "")
     + (a != "0" ? (a != "1" ? " Ratus" : "ratus") : "");
    word += " " + (b != "0" ? (b != "1" ? NOMINAL[parseInt(b)] : "Se") : "")
     + (b != "0" ? (b != "1" ? " Puluh" : "puluh") : "");
    word += " " + (c != "0" ? NOMINAL[parseInt(c)] : "");
    word = word.replace(/Sepuluh ([^ ]+)/gi, "$1 Belas");
    word = word.replace(/Satu Belas/gi, "Sebelas");
    word = word.replace(/^[ ]+$/gi, "");

    return word;
}

function twodigitcent(cent) {
    while (cent.length < 2) {
        cent = (cent + "0000000").substr(0, 2);
    }
    cent = cent.split("");
    a = cent[0];
    b = cent[1];
    cent = "";
    cent += (a != "0" ? (a != "1" ? NOMINAL[parseInt(a)] : "Se") : NOMINAL[parseInt(a)])
     + (a != "0" ? (a != "1" ? " Puluh" : "puluh") : "");
    cent += " " + (b != "0" ? NOMINAL[parseInt(b)] : "");
    cent = cent.replace(/Sepuluh ([^ ]+)/gi, "$1 Belas");
    cent = cent.replace(/Satu Belas/gi, "Sebelas");
    cent = cent.replace(/^[ ]+$/gi, "");

    return cent;
}

function terbilang(s, t, curr) {
    var r = 2;
    if (isNaN(t)) {
        t.toUpperCase().replace(/^\s+|\s+$/g, '');
        t = t == "POINT" ? POINT : CENT;
    }
    t = t == POINT ? POINT : CENT;

    s += "";
    regexp = /^(\d*\.\d+|\d+)$/gi

        if (regexp.test(s)) {
            s = s.replace(/^0+/gi, "");
            var zero3 = Array("", "Ribu", "Juta", "Milyar", "Trilyun", "Kuadriliun", "Kuantiliun", "Sekstiliun",
                    "Septiliun", "Oktiliun", "Noniliun", "Desiliun");

            s = (parseFloat(s)).toFixed(r);
            s = s.split(".");

            var word = s[0];
            var cent = s[1];
            if (cent.length < 2) {
                cent += "0";
            }

            var tWord = "";
            var tCent = "";
            var subword = "";
            i = 0;
            while (word.length > 3) {
                subdigit = threedigit(word.substr(word.length - 3, 3));
                subword = subdigit + (subdigit != "" ? " " + zero3[i] + " " : "") + subword;
                word = word.substring(0, word.length - 3);
                i++;
            }
            subword = threedigit(word) + " " + zero3[i] + " " + subword;
            subword = subword.replace(/^ +$/gi, "");

            tWord = (subword == "" ? "NOL" : subword.toUpperCase());

            if (parseInt(s[1]) > 0) {
                tCent += (t == CENT ? " " + curr : " KOMA")

                if (t == CENT) {
                    subword = twodigitcent(cent);
                } else {
                    // subword=[];
                    // for(i in cent) subword.push(NOMINAL[cent[i]]);
                    // subword=subword.join(" ");
                    subword = twodigitcent(cent);
                }
                tCent += (subword == "" ? "" : " ") + subword.toUpperCase()
                 + (subword == "" || t == POINT ? " " + curr : " SEN");
            } else {
                tCent += curr;
            }

            return (tWord + tCent);
        } else
            return "ERROR: Invalid number format";
}

function toWords(s, curr) {
    // American Numbering System
    var th = ['', 'thousand', 'million', 'billion', 'trillion'];
    // uncomment this line for English Number System
    // var th = ['','thousand','million', 'milliard','billion'];

    var dg = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'];
    var tn = ['ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen'];
    var tw = ['twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'];

    s = s.toString();
    s = s.replace(/[\, ]/g, '');
    if (s != parseFloat(s)) {
        return 'not a number';
    } else {
        sa = (parseFloat(s)).toFixed(2);
        sa = sa.split(".");

        var word = sa[0];
        var cent = sa[1];
    }
    var x = s.indexOf('.');
    var fulllength = s.length;

    if (x == -1)
        x = s.length;
    if (x > 15)
        return 'too big';
    var startpos = fulllength - (fulllength - x - 1);
    var n = s.split('');

    var str = '';
    var str1 = ''; //i added another word called cent
    var sk = 0;
    for (var i = 0; i < x; i++) {
        if ((x - i) % 3 == 2) {
            if (n[i] == '1') {
                str += tn[Number(n[i + 1])] + ' ';
                i++;
                sk = 1;
            } else if (n[i] != 0) {
                str += tw[n[i] - 2] + ' -';

                sk = 1;
            }
        } else if (n[i] != 0) {
            str += ' ' + dg[n[i]] + ' ';
            if ((x - i) % 3 == 0)
                str += 'hundred ';
            sk = 1;
        }
        if ((x - i) % 3 == 1) {
            if (sk)
                str += th[(x - i - 1) / 3] + ' ';
            sk = 0;
        }
    }
    str += curr ;
    // str += (Number(word) > 1 ? 's ' : ' ');

    if (x != s.length) {
        str += ' and ';
        // str1 += 'cents ';
        str1 += (Number(cent) > 1 ? 'cents ' : 'cent ');

        if (cent.length < 3) {
            s = '0' + cent;
        } else {
            s = cent;
        }
        x = s.indexOf('.');
        fulllength = s.length;

        if (x == -1)
            x = s.length;
        if (x > 15)
            return 'too big';
        startpos = fulllength - (fulllength - x - 1);
        n = s.split('');

        for (var i = 0; i < x; i++) {
            if ((x - i) % 3 == 2) {
                if (n[i] == '1') {
                    str += tn[Number(n[i + 1])] + ' ';
                    i++;
                    sk = 1;
                } else if (n[i] != 0) {
                    str += tw[n[i] - 2] + ' -';

                    sk = 1;
                }
            } else if (n[i] != 0) {
                str += ' ' + dg[n[i]] + ' ';
                if ((x - i) % 3 == 0)
                    str += 'hundred ';
                sk = 1;
            }
            if ((x - i) % 3 == 1) {
                if (sk)
                    str += th[(x - i - 1) / 3] + ' ';
                sk = 0;
            }
        }
    }
        str = str.replace(/ - /gi, '-');
        str += ' ' + str1;
        str = str.replace(/- /gi, ' ');
        var result = str.replace(/\s+/gi, ' ');
        result = result.toUpperCase();

        return result;
}