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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta content="width=device-width, initial-scale=1.0" name="viewport" />
<title>Selection sort - AlgoVis.io</title>
<meta
content="AlgoVis is an online algorithm visualization tool."
name="description"
/>
<meta content="algorithm visualization tool online" name="keywords" />
<!-- Favicons -->
<link href="assets/img/favicon.png" rel="icon" />
<link href="assets/img/apple-touch-icon.png" rel="apple-touch-icon" />
<!-- Google Fonts -->
<link
href="https://fonts.googleapis.com/css?family=Open+Sans:300,300i,400,400i,600,600i,700,700i|Raleway:300,300i,400,400i,500,500i,600,600i,700,700i|Poppins:300,300i,400,400i,500,500i,600,600i,700,700i"
rel="stylesheet"
/>
<!-- Vendor CSS Files -->
<link
href="assets/vendor/bootstrap/css/bootstrap.min.css"
rel="stylesheet"
/>
<link href="assets/vendor/icofont/icofont.min.css" rel="stylesheet" />
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<link href="assets/vendor/venobox/venobox.css" rel="stylesheet" />
<link
href="assets/vendor/owl.carousel/assets/owl.carousel.min.css"
rel="stylesheet"
/>
<link href="assets/vendor/aos/aos.css" rel="stylesheet" />
<link rel="stylesheet" href="assets/css/main.css" />
<link
rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-slider/11.0.2/css/bootstrap-slider.min.css"
/>
<!-- Template Main CSS File -->
<link href="assets/css/style.css" rel="stylesheet" />
</head>
<body>
<!-- ======= Top Bar ======= -->
<div
id="topbar"
class="d-none d-lg-flex align-items-center fixed-top header-inner-pages"
>
<div class="container-fluid d-flex">
<div class="contact-info mr-auto"></div>
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><i class="icofont-twitter"></i
></a>
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></a>
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href="https://www.xing.com/profile/Tobias_Noethlich/cv"
class="xing"
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></a>
<a
href="https://www.linkedin.com/in/tobias-noethlich/"
class="linkedin"
><i class="icofont-linkedin"></i
></a>
</div>
</div>
</div>
<!-- ======= Header ======= -->
<header id="header" class="fixed-top header-inner-pages">
<div class="container-fluid d-flex align-items-center">
<a class="btn back-button mr-4" href="sorting.html"
><i class="bx bx-arrow-back white-text" aria-hidden="true"></i>
Back</a
>
<h1 class="logo mr-auto"><a href="index.html">Algovis.io</a></h1>
<!-- Uncomment below if you prefer to use an image logo -->
<!-- <a href="index.html" class="logo mr-auto"><img src="assets/img/logo.png" alt="" class="img-fluid"></a>-->
<nav class="nav-menu d-none d-lg-block">
<ul>
<li><a href="index.html">Home</a></li>
</ul>
</nav>
<!-- .nav-menu -->
</div>
</header>
<!-- End Header -->
<main id="main">
<!-- ======= Breadcrumbs ======= -->
<section id="breadcrumbs" class="breadcrumbs">
<div class="container-fluid">
<ol>
<li><a href="index.html">Home</a></li>
<li><a href="sorting.html">Sorting</a></li>
<li>Selection sort</li>
</ol>
<h2>Selection sort visualization</h2>
</div>
</section>
<!-- End Breadcrumbs -->
<section class="inner-page pt-4">
<div class="container-fluid px-0 mt-2">
<div class="">
<span class="row mx-auto px-0 w-100"
><span class="font-weight-bold ml-2 mt-2 mb-2 compSpan"
>No. of comparisons: 0 </span
><span class="font-weight-bold ml-2 mt-2 mb-2 swapSpan"
>No. of swaps: 0
</span></span
>
<div class="data-container px-1 mb-0 mt-0 w-100">
<svg id="visu"></svg>
</div>
</div>
<div class="row mx-auto">
<div class="col-sm-12 col-md-12 col-lg-6 px-0 mr-0">
<div class="ide w-100">
<div class="row ml-auto mr-auto 1">
<span
><span class="op">for</span>(i = 0 to length(list)-1)</span
>
</div>
<div class="row ml-auto mr-auto mt-1 2">
<span>  min = i</span>
</div>
<div class="row ml-auto mr-auto mt-1 3">
<span
>  <span class="op">for</span>(j = i+1 to
length(list))</span
>
</div>
<div class="row ml-auto mr-auto mt-1 4">
<span
>    <span class="op">if</span>(list[j]
< list[min])</span
>
</div>
<div class="row ml-auto mr-auto mt-1 5">
<span>      min = j</span>
</div>
<div class="row ml-auto mr-auto mt-1 6">
<span>  <span class="op">if</span>(min != i)</span>
</div>
<div class="row ml-auto mr-auto mt-1 7">
<span
>    <span class="op">swap</span
>(list[i], list[min])</span
>
</div>
</div>
</div>
<div class="col-sm-12 col-md-12 col-lg-6 ml-0 px-0">
<div class="ide w-100 pl-0">
<div class="row ml-auto mr-auto">
<span class="comment">---------------------</span>
</div>
<div class="row ml-auto mr-auto mt-1">
<span class="comment">| SHORT EXPLANATION |</span>
</div>
<div class="row ml-auto mr-auto mt-1">
<span class="comment">---------------------</span>
</div>
<div class="row ml-auto mr-auto mt-1">
<span class="comment"
>1. Set the first unsorted element as the minimum.</span
>
</div>
<div class="row ml-auto mr-auto mt-1">
<span class="comment"
>2. Iterate through the rest of the list to find the true
minimum.</span
>
</div>
<div class="row ml-auto mr-auto mt-1">
<span class="comment"
>3. Swap the minimum with the first unsorted element to
build the sorted sublist.</span
>
</div>
<div class="row ml-auto mr-auto mt-1">
<span class="comment"
>2. Repeat steps 1 to 3 until the whole list is sorted</span
>
</div>
</div>
</div>
</div>
<hr data-content="Settings" class="hr-text mb-3 mt-4" />
<div class="row mx-auto">
<div class="col-sm-12 col-md-12 col-lg-6">
<form>
<div class="form-group row">
<div class="col-sm-3">Elements:</div>
<div class="col-sm-9 disableSlider">
<span>5 </span>
<input
id="slider"
data-slider-id="pointsSlider"
type="text"
data-slider-min="5"
data-slider-max="50"
data-slider-step="1"
data-slider-value="15"
/>
<span id="max"> 50</span>
</div>
</div>
<div class="form-group row">
<div class="col-sm-3">Data Generation</div>
<div class="col-sm-9">
<div class="form-check">
<input
id="own-data"
class="form-check-input"
type="checkbox"
id="gridCheck1"
/>
<label class="form-check-label" for="gridCheck1">
Use own data
</label>
</div>
</div>
</div>
</form>
</div>
<div class="col-sm-12 col-md-12 col-lg-6">
<form>
<div class="form-group row">
<div class="col-sm-5">Speed:</div>
<div class="col-sm-7">
<span>Slow </span>
<input
id="speedslider"
data-slider-id="speedSlider"
type="text"
data-slider-min="10"
data-slider-max="1000"
data-slider-step="10"
data-slider-value="200"
/>
<span> Fast</span>
</div>
</div>
<div class="form-group row">
<label for="data-input" class="col-sm-5 col-form-label"
>Your data (max. 50 elements):</label
>
<div class="col-sm-7">
<input
disabled="true"
type="text"
class="form-control"
id="data-input"
placeholder="10,42,34,55,..."
/>
</div>
</div>
</form>
</div>
</div>
<div class="row mx-auto">
<div class="col-4"></div>
<div class="col-4">
<button
id="sort-button"
type="button"
onclick="selectionSort()"
class="btn btn-danger red w-100"
>
Sort
</button>
</div>
<div class="col-4"></div>
</div>
</div>
</section>
</main>
<!-- ======= Footer ======= -->
<footer id="footer">
<div class="footer-top">
<div class="container">
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<div class="footer-info">
<h3>AlgoVis.io</h3>
<strong>Feel free to hit me up on social media:</strong><br />
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></a>
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></a>
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class="xing"
><i class="icofont-xing"></i
></a>
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href="https://www.linkedin.com/in/tobias-noethlich/"
class="linkedin"
><i class="icofont-linkedin"></i
></a>
</div>
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<h4>Useful Links</h4>
<ul>
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</li>
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<!-- Template Main JS File -->
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<script>
$(document).ready(function () {
d3.select("#visu")
.attr("width", "100%")
.attr("height", "370")
.attr("viewBox", "0 0 " + globalThis.screen.availWidth + " 370");
var slider = new Slider("#slider", {
handle: "square",
});
slider.on("slide", function (slideEvt) {
newSet(slideEvt);
});
$("#data-input").on("input", function (e) {
ownData(this.value);
});
$("#own-data").change(function () {
if (this.checked) {
slider.disable();
$("#data-input").prop("disabled", false);
} else {
slider.enable();
$("#data-input").prop("disabled", true);
}
});
var speedSlider = new Slider("#speedslider", {
reversed: true,
tooltip: "none",
handle: "square",
});
speedSlider.on("slide", function (slideEvt) {
setDelay(slideEvt);
});
if (globalThis.screen.availWidth <= 360) {
slider.setAttribute("max", "20");
slider.setAttribute("value", "15");
$("#max").html(" 20");
}
});
</script>
<script>
const container = document.querySelector(".data-container");
var FLAG = false;
var DELAY = 200;
var w = globalThis.screen.availWidth;
var h = 370;
var barPadding = 5;
var data = [];
var x;
var svg = d3.select("#visu");
var comparisons = 0;
var swaps = 0;
function setDelay(delay) {
DELAY = delay;
}
function clamp(number, min, max) {
return Math.max(min, Math.min(number, max));
}
function newSet(num = 20) {
data = [];
for (let i = 0; i < num; i++) {
data.push(Math.floor(Math.random() * 119) + 1);
}
clearBlocks();
generateBlocks(data);
}
function stop() {
FLAG = true;
}
function ownData(d = "1,2,3,4,5,6") {
data = d.split(",");
if (data.length > 50) {
data = data.slice(0, 50);
}
for (let i = 0; i < data.length; i++) {
data[i] = clamp(data[i], 0, 119);
}
clearBlocks();
generateBlocks(data);
}
async function slide(i, j) {
return new Promise((resolve) => {
var calcTransl2 = x(i);
var calcTransl1 = x(j);
var text1 = d3
.select("#text" + i)
.transition("text1")
.duration(DELAY)
.attr("transform", function (d) {
return (
"translate(" + (calcTransl1 + w / data.length / 2) + ", 0)"
);
});
var rect1 = d3
.select("#rect" + i)
.transition("rect1")
.duration(DELAY)
.attr("transform", function (d) {
return "translate(" + calcTransl1 + ", 0)";
});
var text2 = d3
.select("#text" + j)
.transition("text2")
.duration(DELAY)
.attr("transform", function (d) {
return (
"translate(" + (calcTransl2 + w / data.length / 2) + ", 0)"
);
});
var rect2 = d3
.select("#rect" + j)
.transition("rect2")
.duration(DELAY)
.attr("transform", function (d) {
return "translate(" + calcTransl2 + ", 0)";
});
text1.attr("id", "text" + j);
rect1.attr("id", "rect" + j);
text2.attr("id", "text" + i);
rect2.attr("id", "rect" + i);
setTimeout(
() => {
resolve();
},
DELAY < 100 ? DELAY * 5 : DELAY * 2
);
}, 600);
}
function clearBlocks() {
svg.selectAll("rect").data([]).exit().remove();
svg.selectAll("text").data([]).exit().remove();
}
function generateBlocks(data) {
x = d3.scaleLinear().domain([0, data.length]).range([0, w]);
var bars = svg
.selectAll("rect")
.data(data)
.enter()
.append("rect")
.attr("transform", function (d, i) {
return "translate(" + x(i) + ",0)";
})
.attr("y", function (d) {
return h - d * 3;
})
.attr("width", w / data.length - barPadding)
.attr("height", function (d) {
return d * 3;
})
.attr("fill", "#CC1616")
.attr("id", function (d, i) {
return "rect" + i;
});
var labels = svg
.selectAll("text")
.data(data)
.enter()
.append("text")
.text(function (d) {
return d;
})
.attr("transform", function (d, i) {
return "translate(" + (x(i) + w / data.length / 2) + ",0)";
})
.attr("y", function (d) {
return h - d * 3 - 5;
})
.attr("font-family", "sans-serif")
.attr("font-size", "14px")
.attr("fill", "black")
.attr("text-anchor", "middle")
.attr("id", function (d, i) {
return "text" + i;
});
}
function highlightCode(elementClass) {
$(".code-highlight").removeClass("code-highlight");
$(`.${elementClass}`).addClass("code-highlight");
}
async function timeout(delay) {
await new Promise((resolve) =>
setTimeout(() => {
resolve();
}, delay)
);
}
async function selectionSort() {
comparisons = 0;
swaps = 0;
$("#sort-button, #data-input").prop("disabled", true);
$(".disableSlider").prop("hidden", true);
for (let i = 0; i < data.length; i++) {
highlightCode("2");
await timeout(DELAY / 3);
jMin = i;
d3.select("#rect" + i).attr("fill", "#085180");
highlightCode("3");
await timeout(DELAY / 3);
for (let j = i + 1; j < data.length; j++) {
highlightCode("4");
comparisons++;
$(".compSpan").text(`No. of comparisons: ${comparisons}`);
d3.select("#rect" + j).attr("fill", "#9DBDC6");
d3.select("#rect" + (j - 1)).style("fill") == "rgb(8, 81, 128)"
? ""
: d3.select("#rect" + (j - 1)).attr("fill", "#CC1616");
await timeout(DELAY);
if (data[j] < data[jMin]) {
highlightCode("5");
await timeout(DELAY / 3);
if (jMin != i) d3.select("#rect" + jMin).attr("fill", "#CC1616");
jMin = j;
d3.select("#rect" + j).attr("fill", "#085180");
}
}
highlightCode("6");
await timeout(DELAY / 3);
if (jMin != i) {
swaps++;
highlightCode("7");
$(".swapSpan").text(`No. of swaps: ${swaps}`);
await slide(i, jMin);
temp = data[i];
data[i] = data[jMin];
data[jMin] = temp;
d3.select("#rect" + i).attr("fill", "#171717");
d3.select("#rect" + jMin).attr("fill", "#CC1616");
} else {
d3.select("#rect" + i).attr("fill", "#171717");
}
d3.select("#rect" + (data.length - 1)).attr("fill", "#CC1616");
}
for (let i = 0; i < data.length; i++) {
d3.select("#rect" + i).attr("fill", "#171717");
}
$("#sort-button, #data-input").prop("disabled", false);
$(".disableSlider").prop("hidden", false);
highlightCode("0");
}
newSet(15);
</script>
</body>
</html>