798 lines
18 KiB
JavaScript
798 lines
18 KiB
JavaScript
/**
|
|
* @license Fraction.js v4.0.0 09/09/2015
|
|
* http://www.xarg.org/2014/03/rational-numbers-in-javascript/
|
|
*
|
|
* Copyright (c) 2015, Robert Eisele (robert@xarg.org)
|
|
* Dual licensed under the MIT or GPL Version 2 licenses.
|
|
**/
|
|
|
|
|
|
/**
|
|
*
|
|
* This class offers the possibility to calculate fractions.
|
|
* You can pass a fraction in different formats. Either as array, as double, as string or as an integer.
|
|
*
|
|
* Array/Object form
|
|
* [ 0 => <nominator>, 1 => <denominator> ]
|
|
* [ n => <nominator>, d => <denominator> ]
|
|
*
|
|
* Integer form
|
|
* - Single integer value
|
|
*
|
|
* Double form
|
|
* - Single double value
|
|
*
|
|
* String form
|
|
* 123.456 - a simple double
|
|
* 123/456 - a string fraction
|
|
* 123.'456' - a double with repeating decimal places
|
|
* 123.(456) - synonym
|
|
* 123.45'6' - a double with repeating last place
|
|
* 123.45(6) - synonym
|
|
*
|
|
* Example:
|
|
*
|
|
* var f = new Fraction("9.4'31'");
|
|
* f.mul([-4, 3]).div(4.9);
|
|
*
|
|
*/
|
|
|
|
(function(root) {
|
|
|
|
"use strict";
|
|
|
|
// Maximum search depth for cyclic rational numbers. 2000 should be more than enough.
|
|
// Example: 1/7 = 0.(142857) has 6 repeating decimal places.
|
|
// If MAX_CYCLE_LEN gets reduced, long cycles will not be detected and toString() only gets the first 10 digits
|
|
var MAX_CYCLE_LEN = 2000;
|
|
|
|
// Parsed data to avoid calling "new" all the time
|
|
var P = {
|
|
"s": 1,
|
|
"n": 0,
|
|
"d": 1
|
|
};
|
|
|
|
function createError(name) {
|
|
var errorConstructor = function() {
|
|
var temp = Error.apply(this, arguments);
|
|
temp.name = this.name = name;
|
|
this.stack = temp.stack;
|
|
this.message = temp.message;
|
|
}
|
|
|
|
var IntermediateInheritor = function() {};
|
|
IntermediateInheritor.prototype = Error.prototype;
|
|
errorConstructor.prototype = new IntermediateInheritor();
|
|
|
|
return errorConstructor;
|
|
}
|
|
|
|
var DivisionByZero = Fraction['DivisionByZero'] = createError('DivisionByZero');
|
|
var InvalidParameter = Fraction['InvalidParameter'] = createError('InvalidParameter');
|
|
|
|
function assign(n, s) {
|
|
|
|
if (isNaN(n = parseInt(n, 10))) {
|
|
throwInvalidParam();
|
|
}
|
|
return n * s;
|
|
}
|
|
|
|
function throwInvalidParam() {
|
|
throw new InvalidParameter();
|
|
}
|
|
|
|
var parse = function(p1, p2) {
|
|
|
|
var n = 0, d = 1, s = 1;
|
|
var v = 0, w = 0, x = 0, y = 1, z = 1;
|
|
|
|
var A = 0, B = 1;
|
|
var C = 1, D = 1;
|
|
|
|
var N = 10000000;
|
|
var M;
|
|
|
|
if (p1 === undefined || p1 === null) {
|
|
/* void */
|
|
} else if (p2 !== undefined) {
|
|
n = p1;
|
|
d = p2;
|
|
s = n * d;
|
|
} else
|
|
switch (typeof p1) {
|
|
|
|
case "object":
|
|
{
|
|
if ("d" in p1 && "n" in p1) {
|
|
n = p1["n"];
|
|
d = p1["d"];
|
|
if ("s" in p1)
|
|
n*= p1["s"];
|
|
} else if (0 in p1) {
|
|
n = p1[0];
|
|
if (1 in p1)
|
|
d = p1[1];
|
|
} else {
|
|
throwInvalidParam();
|
|
}
|
|
s = n * d;
|
|
break;
|
|
}
|
|
case "number":
|
|
{
|
|
if (p1 < 0) {
|
|
s = p1;
|
|
p1 = -p1;
|
|
}
|
|
|
|
if (p1 % 1 === 0) {
|
|
n = p1;
|
|
} else if (p1 > 0) { // check for != 0, scale would become NaN (log(0)), which converges really slow
|
|
|
|
if (p1 >= 1) {
|
|
z = Math.pow(10, Math.floor(1 + Math.log(p1) / Math.LN10));
|
|
p1/= z;
|
|
}
|
|
|
|
// Using Farey Sequences
|
|
// http://www.johndcook.com/blog/2010/10/20/best-rational-approximation/
|
|
|
|
while (B <= N && D <= N) {
|
|
M = (A + C) / (B + D);
|
|
|
|
if (p1 === M) {
|
|
if (B + D <= N) {
|
|
n = A + C;
|
|
d = B + D;
|
|
} else if (D > B) {
|
|
n = C;
|
|
d = D;
|
|
} else {
|
|
n = A;
|
|
d = B;
|
|
}
|
|
break;
|
|
|
|
} else {
|
|
|
|
if (p1 > M) {
|
|
A+= C;
|
|
B+= D;
|
|
} else {
|
|
C+= A;
|
|
D+= B;
|
|
}
|
|
|
|
if (B > N) {
|
|
n = C;
|
|
d = D;
|
|
} else {
|
|
n = A;
|
|
d = B;
|
|
}
|
|
}
|
|
}
|
|
n*= z;
|
|
} else if (isNaN(p1) || isNaN(p2)) {
|
|
d = n = NaN;
|
|
}
|
|
break;
|
|
}
|
|
case "string":
|
|
{
|
|
B = p1.match(/\d+|./g);
|
|
|
|
if (B[A] === '-') {// Check for minus sign at the beginning
|
|
s = -1;
|
|
A++;
|
|
} else if (B[A] === '+') {// Check for plus sign at the beginning
|
|
A++;
|
|
}
|
|
|
|
if (B.length === A + 1) { // Check if it's just a simple number "1234"
|
|
w = assign(B[A++], s);
|
|
} else if (B[A + 1] === '.' || B[A] === '.') { // Check if it's a decimal number
|
|
|
|
if (B[A] !== '.') { // Handle 0.5 and .5
|
|
v = assign(B[A++], s);
|
|
}
|
|
A++;
|
|
|
|
// Check for decimal places
|
|
if (A + 1 === B.length || B[A + 1] === '(' && B[A + 3] === ')' || B[A + 1] === "'" && B[A + 3] === "'") {
|
|
w = assign(B[A], s);
|
|
y = Math.pow(10, B[A].length);
|
|
A++;
|
|
}
|
|
|
|
// Check for repeating places
|
|
if (B[A] === '(' && B[A + 2] === ')' || B[A] === "'" && B[A + 2] === "'") {
|
|
x = assign(B[A + 1], s);
|
|
z = Math.pow(10, B[A + 1].length) - 1;
|
|
A+= 3;
|
|
}
|
|
|
|
} else if (B[A + 1] === '/' || B[A + 1] === ':') { // Check for a simple fraction "123/456" or "123:456"
|
|
w = assign(B[A], s);
|
|
y = assign(B[A + 2], 1);
|
|
A+= 3;
|
|
} else if (B[A + 3] === '/' && B[A + 1] === ' ') { // Check for a complex fraction "123 1/2"
|
|
v = assign(B[A], s);
|
|
w = assign(B[A + 2], s);
|
|
y = assign(B[A + 4], 1);
|
|
A+= 5;
|
|
}
|
|
|
|
if (B.length <= A) { // Check for more tokens on the stack
|
|
d = y * z;
|
|
s = /* void */
|
|
n = x + d * v + z * w;
|
|
break;
|
|
}
|
|
|
|
/* Fall through on error */
|
|
}
|
|
default:
|
|
throwInvalidParam();
|
|
}
|
|
|
|
if (d === 0) {
|
|
throw new DivisionByZero();
|
|
}
|
|
|
|
P["s"] = s < 0 ? -1 : 1;
|
|
P["n"] = Math.abs(n);
|
|
P["d"] = Math.abs(d);
|
|
};
|
|
|
|
var modpow = function(b, e, m) {
|
|
|
|
for (var r = 1; e > 0; b = (b * b) % m, e >>= 1) {
|
|
|
|
if (e & 1) {
|
|
r = (r * b) % m;
|
|
}
|
|
}
|
|
return r;
|
|
};
|
|
|
|
var cycleLen = function(n, d) {
|
|
|
|
for (; d % 2 === 0;
|
|
d/= 2) {}
|
|
|
|
for (; d % 5 === 0;
|
|
d/= 5) {}
|
|
|
|
if (d === 1) // Catch non-cyclic numbers
|
|
return 0;
|
|
|
|
// If we would like to compute really large numbers quicker, we could make use of Fermat's little theorem:
|
|
// 10^(d-1) % d == 1
|
|
// However, we don't need such large numbers and MAX_CYCLE_LEN should be the capstone,
|
|
// as we want to translate the numbers to strings.
|
|
|
|
var rem = 10 % d;
|
|
|
|
for (var t = 1; rem !== 1; t++) {
|
|
rem = rem * 10 % d;
|
|
|
|
if (t > MAX_CYCLE_LEN)
|
|
return 0; // Returning 0 here means that we don't print it as a cyclic number. It's likely that the answer is `d-1`
|
|
}
|
|
return t;
|
|
};
|
|
|
|
var cycleStart = function(n, d, len) {
|
|
|
|
var rem1 = 1;
|
|
var rem2 = modpow(10, len, d);
|
|
|
|
for (var t = 0; t < 300; t++) { // s < ~log10(Number.MAX_VALUE)
|
|
// Solve 10^s == 10^(s+t) (mod d)
|
|
|
|
if (rem1 === rem2)
|
|
return t;
|
|
|
|
rem1 = rem1 * 10 % d;
|
|
rem2 = rem2 * 10 % d;
|
|
}
|
|
return 0;
|
|
};
|
|
|
|
var gcd = function(a, b) {
|
|
|
|
if (!a) return b;
|
|
if (!b) return a;
|
|
|
|
while (1) {
|
|
a%= b;
|
|
if (!a) return b;
|
|
b%= a;
|
|
if (!b) return a;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Module constructor
|
|
*
|
|
* @constructor
|
|
* @param {number|Fraction} a
|
|
* @param {number=} b
|
|
*/
|
|
function Fraction(a, b) {
|
|
|
|
if (!(this instanceof Fraction)) {
|
|
return new Fraction(a, b);
|
|
}
|
|
|
|
parse(a, b);
|
|
|
|
if (Fraction['REDUCE']) {
|
|
a = gcd(P["d"], P["n"]); // Abuse a
|
|
} else {
|
|
a = 1;
|
|
}
|
|
|
|
this["s"] = P["s"];
|
|
this["n"] = P["n"] / a;
|
|
this["d"] = P["d"] / a;
|
|
}
|
|
|
|
/**
|
|
* Boolean global variable to be able to disable automatic reduction of the fraction
|
|
*
|
|
*/
|
|
Fraction['REDUCE'] = 1;
|
|
|
|
Fraction.prototype = {
|
|
|
|
"s": 1,
|
|
"n": 0,
|
|
"d": 1,
|
|
|
|
/**
|
|
* Calculates the absolute value
|
|
*
|
|
* Ex: new Fraction(-4).abs() => 4
|
|
**/
|
|
"abs": function() {
|
|
|
|
return new Fraction(this["n"], this["d"]);
|
|
},
|
|
|
|
/**
|
|
* Inverts the sign of the current fraction
|
|
*
|
|
* Ex: new Fraction(-4).neg() => 4
|
|
**/
|
|
"neg": function() {
|
|
|
|
return new Fraction(-this["s"] * this["n"], this["d"]);
|
|
},
|
|
|
|
/**
|
|
* Adds two rational numbers
|
|
*
|
|
* Ex: new Fraction({n: 2, d: 3}).add("14.9") => 467 / 30
|
|
**/
|
|
"add": function(a, b) {
|
|
|
|
parse(a, b);
|
|
return new Fraction(
|
|
this["s"] * this["n"] * P["d"] + P["s"] * this["d"] * P["n"],
|
|
this["d"] * P["d"]
|
|
);
|
|
},
|
|
|
|
/**
|
|
* Subtracts two rational numbers
|
|
*
|
|
* Ex: new Fraction({n: 2, d: 3}).add("14.9") => -427 / 30
|
|
**/
|
|
"sub": function(a, b) {
|
|
|
|
parse(a, b);
|
|
return new Fraction(
|
|
this["s"] * this["n"] * P["d"] - P["s"] * this["d"] * P["n"],
|
|
this["d"] * P["d"]
|
|
);
|
|
},
|
|
|
|
/**
|
|
* Multiplies two rational numbers
|
|
*
|
|
* Ex: new Fraction("-17.(345)").mul(3) => 5776 / 111
|
|
**/
|
|
"mul": function(a, b) {
|
|
|
|
parse(a, b);
|
|
return new Fraction(
|
|
this["s"] * P["s"] * this["n"] * P["n"],
|
|
this["d"] * P["d"]
|
|
);
|
|
},
|
|
|
|
/**
|
|
* Divides two rational numbers
|
|
*
|
|
* Ex: new Fraction("-17.(345)").inverse().div(3)
|
|
**/
|
|
"div": function(a, b) {
|
|
|
|
parse(a, b);
|
|
return new Fraction(
|
|
this["s"] * P["s"] * this["n"] * P["d"],
|
|
this["d"] * P["n"]
|
|
);
|
|
},
|
|
|
|
/**
|
|
* Clones the actual object
|
|
*
|
|
* Ex: new Fraction("-17.(345)").clone()
|
|
**/
|
|
"clone": function() {
|
|
return new Fraction(this);
|
|
},
|
|
|
|
/**
|
|
* Calculates the modulo of two rational numbers - a more precise fmod
|
|
*
|
|
* Ex: new Fraction('4.(3)').mod([7, 8]) => (13/3) % (7/8) = (5/6)
|
|
**/
|
|
"mod": function(a, b) {
|
|
|
|
if (isNaN(this['n']) || isNaN(this['d'])) {
|
|
return new Fraction(NaN);
|
|
}
|
|
|
|
if (a === undefined) {
|
|
return new Fraction(this["s"] * this["n"] % this["d"], 1);
|
|
}
|
|
|
|
parse(a, b);
|
|
if (0 === P["n"] && 0 === this["d"]) {
|
|
Fraction(0, 0); // Throw DivisionByZero
|
|
}
|
|
|
|
/*
|
|
* First silly attempt, kinda slow
|
|
*
|
|
return that["sub"]({
|
|
"n": num["n"] * Math.floor((this.n / this.d) / (num.n / num.d)),
|
|
"d": num["d"],
|
|
"s": this["s"]
|
|
});*/
|
|
|
|
/*
|
|
* New attempt: a1 / b1 = a2 / b2 * q + r
|
|
* => b2 * a1 = a2 * b1 * q + b1 * b2 * r
|
|
* => (b2 * a1 % a2 * b1) / (b1 * b2)
|
|
*/
|
|
return new Fraction(
|
|
(this["s"] * P["d"] * this["n"]) % (P["n"] * this["d"]),
|
|
P["d"] * this["d"]
|
|
);
|
|
},
|
|
|
|
/**
|
|
* Calculates the fractional gcd of two rational numbers
|
|
*
|
|
* Ex: new Fraction(5,8).gcd(3,7) => 1/56
|
|
*/
|
|
"gcd": function(a, b) {
|
|
|
|
parse(a, b);
|
|
|
|
// gcd(a / b, c / d) = gcd(a, c) / lcm(b, d)
|
|
|
|
return new Fraction(gcd(P["n"], this["n"]), P["d"] * this["d"] / gcd(P["d"], this["d"]));
|
|
},
|
|
|
|
/**
|
|
* Calculates the fractional lcm of two rational numbers
|
|
*
|
|
* Ex: new Fraction(5,8).lcm(3,7) => 15
|
|
*/
|
|
"lcm": function(a, b) {
|
|
|
|
parse(a, b);
|
|
|
|
// lcm(a / b, c / d) = lcm(a, c) / gcd(b, d)
|
|
|
|
if (P["n"] === 0 && this["n"] === 0) {
|
|
return new Fraction;
|
|
}
|
|
return new Fraction(P["n"] * this["n"] / gcd(P["n"], this["n"]), gcd(P["d"], this["d"]));
|
|
},
|
|
|
|
/**
|
|
* Calculates the ceil of a rational number
|
|
*
|
|
* Ex: new Fraction('4.(3)').ceil() => (5 / 1)
|
|
**/
|
|
"ceil": function(places) {
|
|
|
|
places = Math.pow(10, places || 0);
|
|
|
|
if (isNaN(this["n"]) || isNaN(this["d"])) {
|
|
return new Fraction(NaN);
|
|
}
|
|
return new Fraction(Math.ceil(places * this["s"] * this["n"] / this["d"]), places);
|
|
},
|
|
|
|
/**
|
|
* Calculates the floor of a rational number
|
|
*
|
|
* Ex: new Fraction('4.(3)').floor() => (4 / 1)
|
|
**/
|
|
"floor": function(places) {
|
|
|
|
places = Math.pow(10, places || 0);
|
|
|
|
if (isNaN(this["n"]) || isNaN(this["d"])) {
|
|
return new Fraction(NaN);
|
|
}
|
|
return new Fraction(Math.floor(places * this["s"] * this["n"] / this["d"]), places);
|
|
},
|
|
|
|
/**
|
|
* Rounds a rational numbers
|
|
*
|
|
* Ex: new Fraction('4.(3)').round() => (4 / 1)
|
|
**/
|
|
"round": function(places) {
|
|
|
|
places = Math.pow(10, places || 0);
|
|
|
|
if (isNaN(this["n"]) || isNaN(this["d"])) {
|
|
return new Fraction(NaN);
|
|
}
|
|
return new Fraction(Math.round(places * this["s"] * this["n"] / this["d"]), places);
|
|
},
|
|
|
|
/**
|
|
* Gets the inverse of the fraction, means numerator and denumerator are exchanged
|
|
*
|
|
* Ex: new Fraction([-3, 4]).inverse() => -4 / 3
|
|
**/
|
|
"inverse": function() {
|
|
|
|
return new Fraction(this["s"] * this["d"], this["n"]);
|
|
},
|
|
|
|
/**
|
|
* Calculates the fraction to some integer exponent
|
|
*
|
|
* Ex: new Fraction(-1,2).pow(-3) => -8
|
|
*/
|
|
"pow": function(m) {
|
|
|
|
if (m < 0) {
|
|
return new Fraction(Math.pow(this['s'] * this["d"],-m), Math.pow(this["n"],-m));
|
|
} else {
|
|
return new Fraction(Math.pow(this['s'] * this["n"], m), Math.pow(this["d"], m));
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Check if two rational numbers are the same
|
|
*
|
|
* Ex: new Fraction(19.6).equals([98, 5]);
|
|
**/
|
|
"equals": function(a, b) {
|
|
|
|
parse(a, b);
|
|
return this["s"] * this["n"] * P["d"] === P["s"] * P["n"] * this["d"]; // Same as compare() === 0
|
|
},
|
|
|
|
/**
|
|
* Check if two rational numbers are the same
|
|
*
|
|
* Ex: new Fraction(19.6).equals([98, 5]);
|
|
**/
|
|
"compare": function(a, b) {
|
|
|
|
parse(a, b);
|
|
var t = (this["s"] * this["n"] * P["d"] - P["s"] * P["n"] * this["d"]);
|
|
return (0 < t) - (t < 0);
|
|
},
|
|
|
|
/**
|
|
* Check if two rational numbers are divisible
|
|
*
|
|
* Ex: new Fraction(19.6).divisible(1.5);
|
|
*/
|
|
"divisible": function(a, b) {
|
|
|
|
parse(a, b);
|
|
return !(!(P["n"] * this["d"]) || ((this["n"] * P["d"]) % (P["n"] * this["d"])));
|
|
},
|
|
|
|
/**
|
|
* Returns a decimal representation of the fraction
|
|
*
|
|
* Ex: new Fraction("100.'91823'").valueOf() => 100.91823918239183
|
|
**/
|
|
'valueOf': function() {
|
|
|
|
return this["s"] * this["n"] / this["d"];
|
|
},
|
|
|
|
/**
|
|
* Returns a string-fraction representation of a Fraction object
|
|
*
|
|
* Ex: new Fraction("1.'3'").toFraction() => "4 1/3"
|
|
**/
|
|
'toFraction': function(excludeWhole) {
|
|
|
|
var whole, str = "";
|
|
var n = this["n"];
|
|
var d = this["d"];
|
|
if (this["s"] < 0) {
|
|
str+= '-';
|
|
}
|
|
|
|
if (d === 1) {
|
|
str+= n;
|
|
} else {
|
|
|
|
if (excludeWhole && (whole = Math.floor(n / d)) > 0) {
|
|
str+= whole;
|
|
str+= " ";
|
|
n%= d;
|
|
}
|
|
|
|
str+= n;
|
|
str+= '/';
|
|
str+= d;
|
|
}
|
|
return str;
|
|
},
|
|
|
|
/**
|
|
* Returns a latex representation of a Fraction object
|
|
*
|
|
* Ex: new Fraction("1.'3'").toLatex() => "\frac{4}{3}"
|
|
**/
|
|
'toLatex': function(excludeWhole) {
|
|
|
|
var whole, str = "";
|
|
var n = this["n"];
|
|
var d = this["d"];
|
|
if (this["s"] < 0) {
|
|
str+= '-';
|
|
}
|
|
|
|
if (d === 1) {
|
|
str+= n;
|
|
} else {
|
|
|
|
if (excludeWhole && (whole = Math.floor(n / d)) > 0) {
|
|
str+= whole;
|
|
n%= d;
|
|
}
|
|
|
|
str+= "\\frac{";
|
|
str+= n;
|
|
str+= '}{';
|
|
str+= d;
|
|
str+= '}';
|
|
}
|
|
return str;
|
|
},
|
|
|
|
/**
|
|
* Returns an array of continued fraction elements
|
|
*
|
|
* Ex: new Fraction("7/8").toContinued() => [0,1,7]
|
|
*/
|
|
'toContinued': function() {
|
|
|
|
var t;
|
|
var a = this['n'];
|
|
var b = this['d'];
|
|
var res = [];
|
|
|
|
do {
|
|
res.push(Math.floor(a / b));
|
|
t = a % b;
|
|
a = b;
|
|
b = t;
|
|
} while (a !== 1);
|
|
|
|
return res;
|
|
},
|
|
|
|
/**
|
|
* Creates a string representation of a fraction with all digits
|
|
*
|
|
* Ex: new Fraction("100.'91823'").toString() => "100.(91823)"
|
|
**/
|
|
'toString': function() {
|
|
|
|
var g;
|
|
var N = this["n"];
|
|
var D = this["d"];
|
|
|
|
if (isNaN(N) || isNaN(D)) {
|
|
return "NaN";
|
|
}
|
|
|
|
if (!Fraction['REDUCE']) {
|
|
g = gcd(N, D);
|
|
N/= g;
|
|
D/= g;
|
|
}
|
|
|
|
var p = String(N).split(""); // Numerator chars
|
|
var t = 0; // Tmp var
|
|
|
|
var ret = [~this["s"] ? "" : "-", "", ""]; // Return array, [0] is zero sign, [1] before comma, [2] after
|
|
var zeros = ""; // Collection variable for zeros
|
|
|
|
var cycLen = cycleLen(N, D); // Cycle length
|
|
var cycOff = cycleStart(N, D, cycLen); // Cycle start
|
|
|
|
var j = -1;
|
|
var n = 1; // str index
|
|
|
|
// rough estimate to fill zeros
|
|
var length = 15 + cycLen + cycOff + p.length; // 15 = decimal places when no repitation
|
|
|
|
for (var i = 0; i < length; i++, t*= 10) {
|
|
|
|
if (i < p.length) {
|
|
t+= Number(p[i]);
|
|
} else {
|
|
n = 2;
|
|
j++; // Start now => after comma
|
|
}
|
|
|
|
if (cycLen > 0) { // If we have a repeating part
|
|
if (j === cycOff) {
|
|
ret[n]+= zeros + "(";
|
|
zeros = "";
|
|
} else if (j === cycLen + cycOff) {
|
|
ret[n]+= zeros + ")";
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (t >= D) {
|
|
ret[n]+= zeros + ((t / D) | 0); // Flush zeros, Add current digit
|
|
zeros = "";
|
|
t = t % D;
|
|
} else if (n > 1) { // Add zeros to the zero buffer
|
|
zeros+= "0";
|
|
} else if (ret[n]) { // If before comma, add zero only if already something was added
|
|
ret[n]+= "0";
|
|
}
|
|
}
|
|
|
|
// If it's empty, it's a leading zero only
|
|
ret[0]+= ret[1] || "0";
|
|
|
|
// If there is something after the comma, add the comma sign
|
|
if (ret[2]) {
|
|
return ret[0] + "." + ret[2];
|
|
}
|
|
return ret[0];
|
|
}
|
|
};
|
|
|
|
if (typeof define === "function" && define["amd"]) {
|
|
define([], function() {
|
|
return Fraction;
|
|
});
|
|
} else if (typeof exports === "object") {
|
|
module["exports"] = Fraction;
|
|
} else {
|
|
root['Fraction'] = Fraction;
|
|
}
|
|
|
|
})(this);
|