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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="https://cdn.tailwindcss.com"></script>
<title>Pancake Sort</title>
</head>
<body class="bg-blue-300 text-slate-900">
<nav
class="flex items-center justify-between z-50 flex-wrap bg-blue-200 px-5 pt-1 pb-1 lg:px-20 sticky top-0 text-center border-b border-white shadow-sm"
>
<div class="flex items-center flex-shrink-0 text-slate-50 mr-6 p-2">
<a href="">
<img src="logo.png" class="mr-2 h-8 w-8" alt="Logo" />
</a>
<a href="/" class="font-bold text-slate-900 text-xl">Pancake Sort</a>
</div>
<div class="lg:hidden">
<div
class="flex items-center px-3 py-2 border rounded text-slate-900 bg-white hover:text-slate-600 hover:border-slate-900"
onclick="toggleMenu()"
>
<svg
class="fill-current h-3 w-3"
viewBox="0 0 20 20"
xmlns="http://www.w3.org/2000/svg"
>
<path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z" />
</svg>
</div>
</div>
<div
id="menu"
class="w-full hidden text-left lg:flex lg:items-center lg:w-auto"
>
<div class="text-md">
<a
href="/"
class="block mt-4 lg:inline-block lg:mt-0 text-slate-900 hover:text-slate-600 font-semibold mr-4"
>
Home
</a>
<a
href="#"
class="block mt-4 lg:inline-block lg:mt-0 text-slate-900 hover:text-slate-600 font-semibold mr-4"
>
About
</a>
<a
href="#"
class="block mt-4 lg:inline-block lg:mt-0 text-slate-900 hover:text-slate-600 font-semibold mr-4"
>
Contact
</a>
</div>
</div>
<div id="github" class="hidden lg:flex">
<a
href="https://github.com/sauravhathi/pancake-sort"
class="inline-block font-bold px-4 py-2 leading-none border rounded text-slate-900 border-white hover:border-transparent hover:text-slate-900 hover:bg-white mt-4 lg:mt-0"
>
Github
</a>
</div>
</nav>
<hero
class="grid px-5 lg:px-14 grid-cols-1 lg:grid-cols-2 items-center justify-items-center h-screen"
>
<div class="flex flex-col items-center lg:items-start gap-20">
<div class="w-10/12">
<h1 class="text-4xl font-bold">Pancake Sort</h1>
<p class="text-xl mt-4">
Pancake sorting is the colloquial term for the mathematical problem
of sorting a disordered stack of pancakes in order of size when a
spatula can be inserted at any point in the stack and used to flip
all pancakes above it. A pancake number is the minimum number of
flips required for a given number of pancakes.
</p>
</div>
<div>
<a href="#find">
<button
class="bg-blue-200 hover:bg-white text-slate-900 px-14 py-4 rounded-md text-xl hover:animate-bounce font-semibold border border-white hover:border-transparent"
>
Get Started
</button>
</a>
</div>
</div>
<div class="hidden lg:block">
<img
src="hero.png"
class="rounded-xl w-11/12 p-4 border-2 border-white border-opacity-50 shadow-xl"
alt="Hero"
/>
</div>
</hero>
<div class="container mx-auto">
<div class="flex justify-center items-center h-screen">
<div class="xl:w-1/3 lg:w-1/2 md:w-2/3 w-3/4">
<div id="find" class="mb-10">
<h1 class="text-2xl font-bold text-center">
Pancake Sort
</h1>
</div>
<div
class="bg-blue-200 shadow-md rounded px-8 pt-6 pb-8 mb-4 border border-white"
>
<div class="mb-4">
<label
class="block text-slate-900 text-sm font-bold mb-2"
for="list"
>
Enter the list of numbers
</label>
<input
class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline"
id="list"
name="list"
type="text"
placeholder="e.g. 23 10 20 11 12 6 7"
onchange="reset()"
value="23 10 20 11 12 6 7"
/>
<p class="text-red-500 text-xs mt-2" id="list-error"></p>
</div>
<div class="flex items-center justify-end">
<button
class="bg-slate-50 hover:bg-slate-700 hover:text-slate-50 text-slate-900 font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline"
type="submit"
id="submit"
onclick="pancakeSort()"
>
Submit
</button>
</div>
<hr class="my-4 border-blue-600" />
<div class="mt-4 text-left hidden" id="result-div">
<h1 class="text-xl font-bold">Result</h1>
<div class="mt-4">
<p id="result"></p>
</div>
</div>
</div>
</div>
</div>
</div>
<footer
class="text-center bg-blue-200 text-sm p-4 bottom-0 border-t border-white w-full"
>
Made with ❤️ by
<a href="https://github.com/sauravhathi/" class="font-bold">Saurav Hathi</a>
</footer>
<script>
// responsive menu bar
function toggleMenu() {
var menu = document.getElementById("menu");
var github = document.getElementById("github");
if (
menu.classList.contains("hidden") &&
github.classList.contains("hidden")
) {
menu.classList.remove("hidden");
github.classList.remove("hidden");
} else {
menu.classList.add("hidden");
github.classList.add("hidden");
}
}
// get value from input
function getList() {
var list = document.getElementById("list").value;
// remove beginning and ending spaces and split the string
list = list.trim().split(" ");
// if list is empty
list = list.filter((item) => item !== "");
// return the list
return list;
}
function validateArray(list) {
if (list.length == 0) {
return false;
}
for (var i = 0; i < list.length; i++) {
if (isNaN(list[i])) {
return false;
}
}
return true;
}
function reset() {
var list = getList();
var listError = document.getElementById("list-error");
var resultDiv = document.getElementById("result-div");
var result = document.getElementById("result");
// validate input
if (!validateArray(list)) {
listError.innerHTML = "Please enter a valid list";
resultDiv.classList.add("hidden");
} else {
listError.innerHTML = "";
resultDiv.classList.add("hidden");
}
}
function clr() {
var result = document.getElementById("result");
result.innerHTML = "";
}
function flip(arr, i) {
var temp,
start = 0;
while (start < i) {
temp = arr[start];
arr[start] = arr[i];
arr[i] = temp;
start++;
i--;
}
}
function findMax(arr, n) {
var mi, i;
for (mi = 0, i = 0; i < n; ++i) {
if (arr[i] > arr[mi]) {
mi = i;
}
}
return mi;
}
function pancakeSortFn(arr, n) {
for (var curr_size = n; curr_size > 1; --curr_size) {
var mi = findMax(arr, curr_size);
if (mi != curr_size - 1) {
flip(arr, mi);
flip(arr, curr_size - 1);
}
}
}
function pancakeSort() {
clr();
var list = getList();
var arr = list.map(Number);
var resultDiv = document.getElementById("result-div");
var result = document.getElementById("result");
// validate input
if (!validateArray(list)) {
resultDiv.classList.add("hidden");
return;
} else {
var div = document.createElement("div");
div.classList.add("grid", "grid-cols-1", "gap-2");
var ulList = document.createElement("ul");
ulList.classList.add("flex", "flex-wrap", "gap-2");
var h1LI = document.createElement("h1");
h1LI.classList.add("text-md", "text-slate-900", "font-semibold");
h1LI.innerHTML = "Unsorted List";
for (var i = 0; i < list.length; i++) {
var li = document.createElement("li");
li.classList.add(
"bg-slate-50",
"text-slate-900",
"py-2",
"px-4",
"rounded",
"focus:outline-none",
"focus:shadow-outline"
);
li.innerHTML = list[i];
ulList.appendChild(li);
}
div.appendChild(h1LI);
div.appendChild(ulList);
// sort the list
pancakeSortFn(arr, arr.length);
var ulList = document.createElement("ul");
ulList.classList.add("flex", "flex-wrap", "gap-2");
var h1Pancake = document.createElement("h1");
h1Pancake.classList.add("text-md", "text-slate-900", "font-semibold");
h1Pancake.innerHTML = "Pancake Sort";
for (var i = 0; i < arr.length; i++) {
var li = document.createElement("li");
li.classList.add(
"bg-slate-50",
"text-slate-900",
"py-2",
"px-4",
"rounded",
"focus:outline-none",
"focus:shadow-outline"
);
li.innerHTML = arr[i];
ulList.appendChild(li);
}
div.appendChild(h1Pancake);
div.appendChild(ulList);
resultDiv.classList.remove("hidden");
result.appendChild(div);
}
}
</script>
</body>
</html>