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<!doctype html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<title>Test</title> | |
</head> | |
<body> | |
<article> | |
<h1>Computer Graphics</h1> | |
<p> | |
Computer graphics are graphics created using computers and the representation of image data | |
by a computer specifically with help from specialized graphic hardware and software. | |
The interaction and understanding of computers and interpretation of data has been made | |
easier because of computer graphics. Computer graphic development has had a significant | |
impact on many types of media and have revolutionized animation, movies and the video | |
game industry. | |
</p> | |
<h1>Overview</h1> | |
<p> | |
The term computer graphics has been used in a broad sense to describe "almost everything on | |
computers that is not text or sound".[1] Typically, the term computer graphics refers to | |
several different things: | |
</p> | |
<ul> | |
<li>the representation and manipulation of image data by a computer</li> | |
<li>the various technologies used to create and manipulate images</li> | |
<li> | |
the sub-field of computer science which studies methods for digitally synthesizing and | |
manipulating visual content, see study of computer graphics | |
</li> | |
</ul> | |
<p> | |
Computer graphics is widespread today. Computer imagery is found on television, in newspapers, | |
for example in weather reports, or for example in all kinds of medical investigation and surgical | |
procedures. A well-constructed <a href="http://en.wikipedia.org/wiki/Chart">graph</a> can present | |
complex statistics in a form that is easier to understand and interpret. In the media "such graphs | |
are used to illustrate papers, reports, thesis", and other presentation material.[2] | |
Many powerful tools have been developed to visualize data. Computer generated imagery can be | |
categorized into several different types: two dimensional (2D), three dimensional (3D), and animated | |
graphics. As technology has improved, 3D computer graphics have become more common, but 2D computer | |
graphics are still widely used. Computer graphics has emerged as a sub-field of computer science | |
which studies methods for digitally synthesizing and manipulating visual content. Over the past | |
decade, other specialized fields have been developed like information visualization, and scientific | |
visualization more concerned with "the visualization of three dimensional phenomena (architectural, | |
meteorological, medical, biological, etc.), where the emphasis is on realistic renderings of volumes, | |
surfaces, illumination sources, and so forth, perhaps with a dynamic (time) component".[3] | |
</p> | |
</article> | |
<section id="result"></section> | |
<script> | |
(function() { | |
const getWords = (text) => { | |
return text | |
.toLowerCase() | |
// TODO: clean up text - remove commas, dots, quotes, etc. | |
.split(' '); | |
} | |
const getWordCounts = (words) => { | |
const result = {}; | |
words.forEach(word => { | |
result[word] = result[word] + 1 || 1; | |
}); | |
return result; | |
} | |
const buildOutput = (wordCounts) => { | |
const wordArray = []; | |
Object.keys(wordCounts).forEach(word => wordArray.push({ | |
word, | |
count: words[word] | |
})); | |
wordArray.sort((a, b) => a.count > b.count); | |
return wordArray; | |
} | |
const text = document.querySelectorAll('article')[0].textContent; | |
const words = getWords(text); | |
const wordCounts = getWordCounts(words); | |
const output = buildOutput(wordCounts); | |
const outputElement = document.getElementById('result'); | |
// TODO: create ol element | |
output.forEach(wordObj => { | |
const li = document.createElement('li'); | |
li.textContent = `${wordObj.word} (${wordObj.count})`; | |
outputElement.appendChild(li); | |
}); | |
})(); | |
// Test getWords, getWordCounts, buildOutput | |
// Unit testing framework - Mocha, expect, chai | |
// test the functions separately with various inputs | |
// and expect specific result | |
// getWords: '', 'a' 'a b', 'ABC', 'ABC abc' etc. | |
// getWordCounts: [], ['abc'], ['abc', 'test', 'abc'], etc. | |
// buildOutput: {}, { abc: 1 }, { abc: 1, test: 2} etc. | |
</script> | |
</body> | |
</html> |
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