Gnome Sort Visualizer using JavaScript
Gnome Sort also called Stupid sort, is based on the concept of a Garden Gnome sorting his flower pots. In order to know more about it. Please refer to Gnome Sort.
An algorithm like Gnome Sort can be easily understood by visualizing instead of long codes. In this article, Gnome Sort Visualizer is implemented using HTML, CSS & JavaScript.
Pre-requisites:
- Gnome Sort.
- Basic HTML, CSS & JavaScript.
- JavaScript promises.
- JavaScript async/await function.
Approach:
- Button Generate New Array generates an array of random values using the Math.random() function and a bar corresponding to that value in terms of height.
- Different colors are used to indicate which elements are unsorted(sky-blue), compared(darkblue & red) & sorted(lightgreen).
- Button Gnome Sort the elements using the Gnome sort algorithm.
- Finally, elements are sorted.
index.html
<!DOCTYPE html> <html lang="en"> <!-- Head --> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <!-- Title --> <title>Gnome Sort Visualizer</title> <!-- Linking style.css --> <link href="style.css" rel="stylesheet" /> </head> <!-- Body --> <body> <section class="head">Gnome Sort Visualizer</section> <section class="data-container"></section> <section id="ele"></section> <div style="margin: auto; width: fit-content"> <!-- "Generate New Array" button --> <button class="btn1" onclick="generate()" id="Button1"> Generate New Array </button> <!-- "Gnome Sort" button --> <button class="btn2" onclick="CombSort(),disable()" id="Button2"> Gnome Sort </button> </div> </body> <!-- Linking script.js --> <script src="script.js"></script> </html> |
style.css
.mySlides { display: none; } body { background-color: rgb(255, 235, 211); font-family: Verdana, sans-serif; } .head { margin-top: 20px; margin-right: 20vw; margin-left: 20vw; text-align: center; font-size: 30px; background-color: #6f459e; color: white; border-radius: 19px; font-weight: bolder; } .data-container { width: 600px; height: 364px; position: relative; margin: 0 auto; } .bar { width: 28px; position: absolute; left: 0; bottom: 0; background-color: rgb(0, 183, 255); transition: 0.2s all ease; } .bar__id { position: absolute; top: -24px; width: 100%; text-align: center; } .btn1 { padding: 12px; font-weight: bolder; background-color: #6f459e; border-radius: 10px; color: white; font-size: 16px; border: white; margin-top: 1vw; margin-right: 1vw; } .btn2 { padding: 12px; font-weight: bolder; background-color: #6f459e; border-radius: 10px; color: white; font-size: 16px; border: white; } #ele { text-align: center; height: 35px; } |
script.js
const container = document.querySelector(".data-container"); // Function to generate bars function generatebars(num = 20) { // For loop to generate 20 bars for (let i = 0; i < num; i += 1) { // To generate random values from 1 to 100 const value = Math.floor(Math.random() * 100) + 1; // To create element "div" const bar = document.createElement("div"); // To add class "bar" to "div" bar.classList.add("bar"); // Provide height to the bar bar.style.height = `${value * 3}px`; // Translate the bar towards positive X axis bar.style.transform = `translateX(${i * 30}px)`; // To create element "label" const barLabel = document.createElement("label"); // To add class "bar_id" to "label" barLabel.classList.add("bar__id"); // Assign value to "label" barLabel.innerHTML = value; // Append "Label" to "div" bar.appendChild(barLabel); // Append "div" to "data-container div" container.appendChild(bar); } } // Asynchronous function to perform "Gnome Sort" async function CombSort(delay = 600) { let bars = document.querySelectorAll(".bar"); var pos = 0; while (pos < 20) { if (pos == 0) { pos++; } // Assigning value of posth bar into value1 var value1 = parseInt(bars[pos].childNodes[0].innerHTML); // Assigning value of pos-1th bar into value1 var value2 = parseInt(bars[pos - 1].childNodes[0].innerHTML); // Comparing value1 and value2 if (value1 >= value2) { pos++; } else { // Provide red color to the posth bar bars[pos].style.backgroundColor = "red"; // Provide red color to the pos-1th bar bars[pos - 1].style.backgroundColor = "red"; // Swap posth bar with (pos-1)th bar var temp1 = bars[pos].style.height; var temp2 = bars[pos].childNodes[0].innerText; // To pause the execution of code for 300 milliseconds await new Promise((resolve) => setTimeout(() => { resolve(); }, 300) ); // Swap posth bar with (pos-1)th bar bars[pos].style.height = bars[pos - 1].style.height; bars[pos].childNodes[0].innerText = bars[pos - 1].childNodes[0].innerText; bars[pos - 1].style.height = temp1; bars[pos - 1].childNodes[0].innerText = temp2; pos--; } // To pause the execution of code for 300 milliseconds await new Promise((resolve) => setTimeout(() => { resolve(); }, 300) ); // Providing skyblue color for (var x = 0; x < 20; x++) { bars[x].style.backgroundColor = "rgb(0, 183, 255)"; } } // Providing lightgreen color for (var x = 0; x < 20; x++) { bars[x].style.backgroundColor = "rgb(49, 226, 13)"; } // To enable the button "Generate New Array" after final(sorted) document.getElementById("Button1").disabled = false; document.getElementById("Button1").style.backgroundColor = "#6f459e"; // To enable the button "Gnome Sort" after final(sorted) document.getElementById("Button2").disabled = false; document.getElementById("Button2").style.backgroundColor = "#6f459e"; } // Call "generatebars()" function generatebars(); // Function to generate new random array function generate() { window.location.reload(); } // Function to disable the button function disable() { // To disable the button "Generate New Array" document.getElementById("Button1").disabled = true; document.getElementById("Button1").style.backgroundColor = "#d8b6ff"; // To disable the button "Gnome Sort" document.getElementById("Button2").disabled = true; document.getElementById("Button2").style.backgroundColor = "#d8b6ff"; } |
Output:
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