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main.js
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//whether it's black on white or white on black
let dark = false;
//whether the link options tray is hidden or shown
let linkOptionsVisible = false;
//the amount of precision after the decimal point in associated display modes
let decimals = 3n;
//the list of instructions in a JS friendly format
let instructions = [];
//the comments and locations
let comments = [];
//any repeats currently being dealt with
let repeats = [];
//the values shuffled on a stack
let values = [];
//the named variables
let aux = new Map();
//where we are in the instructions
let current = -1;
//whether the program is stepping manually or automatically
let allowRunning = true;
//the beating heart of this magnum opus
let timer;
//how fast are we going?
let speedSelect = 0n;
//the time between update bursts
let speed = 500;
//the amount of updates per burst
let steps = 1;
//where "repeat" and "next" instructions are
let rnList = [];
//output data
let outputList = [];
//the most recent error message
let lastError = "";
const texts = {
errors: {
argument: "Error: Invalid argument(s).",
command: "Error: Invalid command.",
det0: "Error: Matrix has determinate of zero.",
div0: "Error: Division by zero.",
invalidEscapeCharacter: "Invalid escape character.",
jumpedOutOfLoop: "Error: Outside of current loop.",
matrixDim: "Error: Matrices have incompatible sizes.",
missingVariable: ["Error: Variable \"", "\" doesn't exist."],
negative: "Error: Non-negative expected.",
notInLoop: "Error: Not in a loop.",
outOfBounds: "Error: Out of bounds.",
parameterNotRational: "Error: A parameter wasn't a rational or integer.",
parameterNotString: "Error: A parameter wasn't a string",
parameterMatrix: "Error: Parameters are rationals or strings.",
parameterNotVector: "Error: A parameter wasn't a vector.",
shortStack: "Error: The stack doesn't have enough items.",
tooDeep: "Error: Too deep.",
unclosedString: "Error: Unclosed string.",
variableName: "Error: Variable names can't start with quotes",
variableParameterMatrix: "Error: Parameters are rationals or strings, try using place"
},
input: {
rational: "Input an integer, rational, decimal, or recurring decimal:",
text: "Input some text:"
}
};
function reset() {
instructions = instructionInput.value.split("\n");
instructions = instructions.map((s) => s.trim());
values = [];
repeats = [];
comments = [];
outputList = [];
aux = new Map();
let cpos = [];
for (let i = 0; i < instructions.length; i++) {
if (instructions[i].startsWith("\"")) {
cpos.push(i);
}
}
for (let i = 0; i < cpos.length; i++) {
if (i >= 1 && cpos[i] == cpos[i - 1] + 1) {
let c = comments.pop();
c.push(instructions[cpos[i]].substring(1));
comments.push(c);
} else {
comments.push([cpos[i] - i, instructions[cpos[i]].substring(1)]);
}
}
for (let i = cpos.length - 1; i >= 0; i--) {
instructions.splice(cpos[i], 1);
}
rnList = instructions.map((s) => {
if (s.startsWith("repeat")) {
return 1;
} else if (s == "next") {
return 2;
}
return 0;
});
}
function toHTML(o) {
if (appearenceSelect.value == "latex") {
return "<img src=\"https://latex.codecogs.com/svg.image?" + (dark ? "%5Ccolor%7BWhite%7D" : "") + o.toLatex() + "\">";
} else if (o instanceof Rational) {
return rationalAppearence(o.clone());
} else if (o instanceof Matrix) {
return matrixToTable(o.clone());
}
return "";
}
function matrixToTable(M) {
let h = "<table>"
for (let i = 0n; i < M.rows; i++) {
h += "\n<tr>";
if (M.rows == 1n) {
h += "\n<td>[</td>";
} else if (i == 0n) {
h += "\n<td class=\"shift\">⎡</td>";
} else if (i == M.rows - 1n) {
h += "\n<td class=\"shift\">⎣</td>";
} else {
h += "\n<td class=\"shift\">⎢ </td>";
}
for (let j = 0n; j < M.columns; j++) {
h += "\n<td class=\"matrixIndex\">" + rationalAppearence(M.indices[i][j].clone()) + "</td>";
}
if (M.rows == 1n) {
h += "\n<td>]</td>";
} else if (i == 0n) {
h += "\n<td class=\"shift\">⎤</td>";
} else if (i == M.rows - 1n) {
h += "\n<td class=\"shift\">⎦</td>";
} else {
h += "\n<td class=\"shift\">⎥</td>";
}
h += "\n</tr>";
}
return h + "\n</table>";
}
function rationalAppearence(R) {
let str;
switch (appearenceSelect.value) {
case "fraction":
str = rationalToTable(R, false);
break;
case "fractioncommas":
str = rationalToTable(R, true);
break;
case "decimal":
str = rationalToDecimal(R, decimals, false);
break;
case "decimalcommas":
str = rationalToDecimal(R, decimals, true);
break;
default:
str = "Huh?";
}
return str;
}
function rationalToTable(R, commas = false) {
if (R.denominator == 1n) {
return "<p>" + BigIntToString(R.numerator, commas) + "</p>";
} else {
return "<table>\n<tr>\n<td class=\"numerator\">" + BigIntToString(R.numerator, appearenceSelect.value == "fractioncommas") + "</td>\n</tr>\n<tr>\n<td class=\"denominator\">" + BigIntToString(R.denominator, appearenceSelect.value == "fractioncommas") + "</td>\n</tr>\n</table>";
}
}
function rationalToDecimal(R, p, commas = false) {
let neg = R.numerator < 0;
if (neg) {
R.mult(new Rational(-1n));
}
let s = R.toDecimal(p, 10n, ":");
if (s.endsWith("[0]")) {
s = s.substring(0, s.length - 3);
}
if (s.endsWith(":")) {
s = s.substring(0, s.length - 1);
if (commas) {
for (let i = s.length - 3; i > 0; i -= 3) {
s = s.substring(0, i) + ";" + s.substring(i);
}
}
} else if (commas) {
let int, decimal;
let bracketIndex = s.indexOf("[") - 1;
[int, decimal] = s.split(":");
for (let i = int.length - 3; i > 0; i -= 3) {
int = int.substring(0, i) + ";" + int.substring(i);
}
for (let i = 3; i < decimal.length - 2 * (bracketIndex != -1); i += 4) {
let j = i;
if (bracketIndex != -1 && i >= bracketIndex) {
j++;
}
decimal = decimal.substring(0, j) + ";" + decimal.substring(j);
}
s = int + ":" + decimal;
}
if (neg) {
s = "-" + s;
}
return s.replaceAll(":", britishCheck.checked ? "," : ".").replaceAll(";", britishCheck.checked ? "." : ",");
}
function interpretStringToRational(str, isInput = false) {
if (/-?\d+[\.,]\d*\[\d+\]/.test(str)) {
let numComponents = str.split(/[,\.\[]/);
let int = new Rational(BigInt(numComponents[0]));
let frac = new Rational(BigInt(numComponents[1]), 10n ** BigInt(numComponents[1].length));
let rep = new Rational(BigInt(numComponents[2].slice(0, -1)), 10n ** BigInt(numComponents[1].length) * (10n ** (BigInt(numComponents[2].length) - 1n) - 1n));
frac.add(rep);
if (int.numerator >= 0n) {
int.add(frac);
} else {
int.sub(frac);
}
values.unshift(int);
} else if (/-?\d+[\.,]\d+/.test(str)) {
let numComponents = str.split(/[,\.]/);
let int = new Rational(BigInt(numComponents[0]));
let frac = new Rational(BigInt(numComponents[1]), 10n ** BigInt(numComponents[1].length));
if (int.numerator >= 0n) {
int.add(frac);
} else {
int.sub(frac);
}
values.unshift(int);
} else if (/-?\d+\/\d+/.test(str)) {
let numComponents = str.split("/");
values.unshift(new Rational(BigInt(numComponents[0]), BigInt(numComponents[1])));
values[0].add(new Rational(0n));
} else if (/-?\d+/.test(str)) {
values.unshift(new Rational(BigInt(str)));
} else if (isInput) {
return false;
} else {
lastError = texts.errors.command
return false;
}
return true;
}
function BigIntToString(I, commas = false) {
let neg = I < 0;
I = BigMathJS.abs(I);
let s = I.toString();
let digits = s.length;
if (commas) {
let digitsArray = [];
for (var i = 1; 3 * i <= digits - 1; i++) {
digitsArray.unshift(s.substring(digits - 3 * i, digits - 3 * i + 3));
}
digitsArray.unshift(s.substring(0, digits - 3 * i + 3));
s = digitsArray.join(britishCheck.checked ? "." : ",");
}
if (neg) {
s = "-" + s;
}
return s
}
function updateUI() {
output.innerHTML = "";
let list = document.createElement("ol");
for (const o of outputList) {
let item = document.createElement("li");
if (typeof o == "string") {
if (o.startsWith("\n")) {
output.appendChild(list);
list = document.createElement("ol");
if (o.length == 1) {
item.remove();
continue;
}
item.innerText = o.substring(1);
} else {
item.innerText = o
}
} else {
item.innerHTML = toHTML(o);
}
list.appendChild(item);
}
output.appendChild(list);
if (stateDisplay.hidden) return;
list = "";
let indexRow = "";
for (let i = (values.length - 1); i >= 0; i--) {
if (!allowRunning) {
indexRow += "<td>" + BigInt(i) + "</td>"
}
if (appearenceSelect.value == "latex") {
valElem = "<img src=\"https://latex.codecogs.com/svg.image?" + (dark ? "%5Ccolor%7BWhite%7D" : "") + values[i].toLatex() + "\">";
} else {
if (values[i] instanceof Rational) {
valElem = rationalAppearence(values[i].clone());
} else if (values[i] instanceof Matrix) {
valElem = matrixToTable(values[i].clone());
}
}
if (allowRunning) {
list += "<li>" + valElem + "</li>\n"
} else {
list += "<td>" + valElem + "</td>"
}
}
if (allowRunning) {
valueStack.innerHTML = list;
} else {
valueStack.innerHTML = "<li><table><tr class=\"index\">" + indexRow + "</tr><tr class=\"valRow\">" + list + "</tr></table></li>"
}
if (aux.keys().next().done) {
// hide if empty
auxillaryArray.parentElement.hidden = true;
} else {
list = ""
for (let kv of aux.entries()) {
list += "<li><p class=\"auxKey\">" + kv[0] + "</p><br>";
if (appearenceSelect.value == "latex") {
list += "<img src=\"https://latex.codecogs.com/svg.image?" + (dark ? "%5Ccolor%7BWhite%7D" : "") + kv[1].toLatex() + "\"></li>";
} else {
if (kv[1] instanceof Rational) {
list += rationalAppearence(kv[1].clone()) + "</li>\n";
} else if (kv[1] instanceof Matrix) {
list += matrixToTable(kv[1].clone()) + "</li>\n";
}
}
}
auxillaryArray.innerHTML = list;
auxillaryArray.parentElement.hidden = false;
}
if (repeats.length == 0) {
//hide if empty
repeatPile.parentElement.hidden = true;
} else {
list = "";
for (let i = 0; i < repeats.length; i++) {
list += "<li>" + repeats[i][0].toString() + ", " + repeats[i][1].toString() + ", " + repeats[i][2].toString() + ", " + repeats[i][3].toString() + "</li>\n";
}
repeatPile.innerHTML = list;
repeatPile.parentElement.hidden = false;
}
list = "";
let c = comments.findIndex((e) => { return e[0] == 0; });
if (c >= 0) {
for (let j = 1; j < comments[c].length; j++) {
list += "<li><p class=\"comment\">\"" + comments[c][j] + "\"</p></li>\n";
}
}
for (let i = 0; i < instructions.length; i++) {
list += "<li " + (i == current ? "class=\"curr\" >" : ">") + (allowRunning || current == -2 || current == -1 ? "" : "<p class=\"index\">" + BigInt(i - current) + "</p><br>") + instructions[i] + "</li>\n";
let c = comments.findIndex((e) => { return e[0] == i + 1; });
if (c >= 0) {
for (let j = 1; j < comments[c].length; j++) {
list += "<li><p class=\"comment\">\"" + comments[c][j] + "\"</p></li>\n";
}
}
}
instructionList.innerHTML = list;
}
function appendToOutput(message) {
if (typeof outputList.at(-1) == "string" && typeof message == "string") {
message = outputList.pop() + message;
}
if (typeof message == "string") {
if (!message) return;
let n = message.indexOf("\n", 1);
while (n > 0) {
outputList.push(message.substring(0, n));
message = message.substring(n);
n = message.indexOf("\n", 1);
}
outputList.push(message);
} else {
outputList.push(message);
}
}
function step() {
let e;
if (allowRunning) {
// a burst of instructions
for (let i = 0; i < steps; i++) {
e = doInstruction();
if (!e) break;
}
} else {
e = doInstruction();
}
if (current != -1) {
if (e === false) {
updateUI();
allowRunning = false;
updateControls();
output.innerHTML += (output.innerHTML.length == 0 ? "" : "<br>") + "<span class=error>" + lastError + "</span";
current = -1;
} else if (current == instructions.length) {
current = -1;
updateUI();
} else if (allowRunning) {
updateUI();
timer = setTimeout(step, speed);
} else {
updateUI();
}
}
}
function doInstruction() {
if (current == -1 || current == instructions.length) {
return;
}
let I = instructions[current].split(" ");
for (let i = 1; i < I.length; i++) {
if (I[i].startsWith("]")) {
let refer = BigInt(I[i].substring(1));
let parameter = values[refer];
if (!parameter) {
lastError = texts.errors.outOfBounds;
return false;
}
if (parameter instanceof Rational) {
I.splice(i, 1, (parameter.numerator / parameter.denominator).toString());
} else {
lastError = texts.errors.parameterMatrix;
return false;
}
} else if (I[i].startsWith("[")) {
let refer = values.length - Number.parseInt(I[i].substring(1)) - 1;
let parameter = values[refer];
if (!parameter) {
lastError = texts.errors.outOfBounds;
return false;
}
if (parameter instanceof Rational) {
I.splice(i, 1, (parameter.numerator / parameter.denominator).toString());
} else {
lastError = texts.errors.parameterMatrix;
return false;
}
} else if (I[i].startsWith("$")) {
let key = I[i].substring(1);
if (aux.has(key)) {
let parameter = aux.get(key).clone();
if (parameter instanceof Rational) {
I.splice(i, 1, (parameter.numerator / parameter.denominator).toString());
} else {
lastError = texts.errors.variableParameterMatrix;
return false;
}
} else {
lastError = texts.errors.missingVariable.toSpliced(1, 0, I[i].substring(1)).join("");
return false;
}
} else if (I[i].startsWith("\"")) {
if (I[i].length == 1 || !I[i].endsWith("\"") || /(?:^|[^\\])(?:\\\\)*\\"$/.test(I[i])) {
if (i + 1 < I.length) {
I.splice(i, 2, I[i] + " " + I[i + 1]);
i--;
} else {
lastError = texts.errors.unclosedString;
return false;
}
} else {
for (let j = 0; j < I[i].length; j++) {
if (I[i][j] == "\\") {
let replaced = "";
switch (I[i][j + 1]) {
case "n":
replaced = "\n";
break;
case "\\":
replaced = "\\";
break;
case "\"":
replaced = "\"";
break;
default:
lastError = texts.errors.invalidEscapeCharacter;
return false;
}
I[i] = I[i].substring(0, j) + replaced + I[i].substring(j + 2);
}
}
}
}
}
const intRegex = /^-?\d+$/;
const strRegex = /^"[\s\S]*"$/;
switch (I.length) {
case 1:
switch (I[0]) {
case "#":
values.unshift(new Rational(BigInt(values.length)));
break;
case "%":
{
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational && values[1] instanceof Rational) {
if (values[0].numerator == 0n) {
lastError = texts.errors.div0;
return false;
}
let C = values[1].clone();
C.div(values[0]);
let D = C.clone();
D.integer();
if (C.compare(D) == -1n) {
D.sub(1n);
}
D.mult(values[0]);
values[1].sub(D);
values.shift();
} else {
lastError = texts.errors.argument;
return false;
}
break;
}
case "*":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational && values[1] instanceof Rational) {
values[1].mult(values[0]);
values.shift();
} else if (values[0] instanceof Matrix && values[1] instanceof Rational) {
values[0].scale(values[1]);
values.splice(1, 1);
} else if (values[0] instanceof Rational && values[1] instanceof Matrix) {
values[1].scale(values[0]);
values.shift();
} else if (values[0] instanceof Matrix && values[1] instanceof Matrix) {
if (values[1].columns != values[0].rows) {
lastError = texts.errors.matrixDim;
return false;
}
values[1].product(values[0]);
values.shift();
} else {
//Impossible to get here, but fits the pattern!
lastError = texts.errors.argument;
return false;
}
break;
case "+":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false; ``
}
if (values[0] instanceof Rational && values[1] instanceof Rational || values[0] instanceof Matrix && values[1] instanceof Matrix) {
values[1].add(values[0]);
values.shift();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "-":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational && values[1] instanceof Rational) {
values[1].sub(values[0]);
values.shift();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "/":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational && values[1] instanceof Rational) {
if (values[0].numerator == 0) {
lastError = texts.errors.div0;
return false;
}
values[1].div(values[0]);
values.shift();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "aug":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix && values[1] instanceof Matrix) {
if (values[0].rows != values[1].rows) {
lastError = texts.errors.matrixDim;
return false;
}
values[1].augment(values[0]);
values.shift();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "break":
{
if (repeats.length == 0) {
lastError = texts.errors.notInLoop;
return false;
}
let r = repeats[0][2];
let n = repeats[0][3];
if (r < current && current < n) {
current = n;
repeats.shift();
} else {
lastError = texts.errors.jumpedOutOfLoop;
return false;
}
break;
}
case "ceil":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational) {
values[0].ceiling();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "compare":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational && values[1] instanceof Rational) {
values.splice(0, 2, new Rational(BigInt(values[1].compare(values[0]))));
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "den":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational) {
values.splice(0, 1, new Rational(values[0].denominator));
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "det":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix) {
values.splice(0, 1, values[0].determinate());
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "dim":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix) {
values.unshift(new Rational(values[0].rows), new Rational(values[0].columns));
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "dot":
{
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix && values[1] instanceof Matrix) {
if (values[0].columns != 1 || values[1].columns != 1) {
lastError = texts.errors.argumentNotVector;
return false;
}
if (values[0].rows != values[1].rows) {
lastError = texts.errors.matrixDim;
return false;
}
let A = values[1].clone();
values.splice(0, 2, A.dotProduct(values[0]));
} else {
lastError = texts.errors.argument;
return false;
}
break;
}
case "floor":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational) {
values[0].floor();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "flip":
{
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix) {
let A = values[0].clone();
if (A.columns >= 2n) {
let B = [];
for (let i = 0n; i < A.rows; i++) {
for (let j = A.columns - 1n; j >= 0n; j--) {
B.push(A.indices[i][j].clone())
}
}
values.splice(0, 1, new Matrix(A.columns, B.flat()));
}
}
break;
}
case "gcd":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational && values[0].denominator == 1n && values[0] instanceof Rational && values[0].denominator == 1n) {
values.splice(0, 2, new Rational(BigMathJS.gcd(values[0].numerator, values[1].numerator)));
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "hadamard":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix && values[1] instanceof Matrix) {
if (values[0].rows != values[1].rows || values[0].columns != values[1].columns) {
lastError = texts.errors.matrixDim;
return false;
}
values[1].hadamardProduct(values[0]);
values.shift();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "inputR":
while (!interpretStringToRational(prompt(texts.input.rational, "0"), true));
break;
case "inputS":
{
let s = prompt(texts.input.text);
if (s == null) s = "";
for (let i = s.length - 1; i >= 0; i--) {
values.unshift(new Rational(BigInt(s.charCodeAt(i))));
}
values.unshift(new Rational(BigInt(s.length)));
break;
}
case "int":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational) {
values[0].integer();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "inv":
{
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
let A = values[0].clone();
if (A.inverse() instanceof Error) {
if (values[0] instanceof Rational) {
lastError = texts.errors.div0;
} else if (values[0] instanceof Matrix) {
lastError = texts.errors.det0;
}
return false;
}
values.splice(0, 1, A);
}
break;
case "kronecker":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix && values[1] instanceof Matrix) {
values[1].kroneckerProduct(values[0]);
values.shift();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "lcm":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational && values[0].denominator == 1n && values[0] instanceof Rational && values[0].denominator == 1n) {
if (values[0].numerator == 0n || values[1].numerator == 0n) {
values.splice(0, 2, new Rational(0n));
} else {
values.splice(0, 2, new Rational(BigMathJS.lcm(values[0].numerator, values[1].numerator)));
}
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "next":
if (repeats.length >= 1) {
if (repeats[0][0] < repeats[0][1]) {
repeats[0][0]++;
current = repeats[0][2];
} else {
repeats.shift();
}
} else {
lastError = texts.errors.notInLoop;
return false;
}
break;
case "outer":
if (values.length < 2) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix && values[1] instanceof Matrix) {
if (values[0].columns != 1 || values[1].columns != 1) {
lastError = texts.errors.parameterNotVector;
return false;
}
values[1].outerProduct(values[0]);
values.shift();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "outputV":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
appendToOutput(values.shift());
break;
case "ref":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix) {
values[0].gaussianElimination();
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "rip":
{
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix) {
let A = values[0].clone();
if (A.columns >= 2n) {
let col = [];
let B = []
for (let i = 0n; i < A.rows; i++) {
for (let j = 0n; j < A.columns - 1n; j++) {
B.push(A.indices[i][j].clone());
}
col.push(A.indices[i][A.columns - 1n].clone());
}
values.splice(0, 1, new Matrix(1n, col.flat()), new Matrix(A.columns - 1n, B.flat()));
}
} else {
lastError = texts.errors.argument;
return false;
}
break;
}
case "step":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Rational) {
values.splice(0, 1, new Rational(BigInt(values[0].numerator >= 1n)));
} else {
lastError = texts.errors.argument;
return false;
}
break;
case "T":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (values[0] instanceof Matrix) {
values[0].transpose();
} else {
lastError = texts.errors.argument;
return false;
}
break;
default:
if (!interpretStringToRational(I[0])) return false;
break;
}
break;
case 2:
switch (I[0]) {
case "->":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (!intRegex.test(I[1])) {
lastError = texts.errors.parameterNotRational;
return false;
}
index = Number.parseInt(I[1]);
if (values[index]) {
values.unshift(values.splice(index, 1)[0]);
} else {
lastError = texts.errors.outOfBounds;
return false;
}
break;
case "<-":
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (!intRegex.test(I[1])) {
lastError = texts.errors.parameterNotRational;
return false;
}
index = Number.parseInt(I[1]);
if (values[index]) {
values.splice(index, 0, values.shift());
} else {
lastError = texts.errors.outOfBounds;
return false;
}
break;
case ">>":
{
if (values.length < 1) {
lastError = texts.errors.shortStack;
return false;
}
if (!intRegex.test(I[1])) {
lastError = texts.errors.parameterNotRational;
return false;
}
let copiedVal = values[BigInt(I[1])];
if (copiedVal) {
values.unshift(copiedVal.clone());