Tiny and Simple Javascript Graphing Library

picograph.js

Simple and tiny graphing library for javascript.

Demo

<!DOCTYPE html>
<html>
    <head>
        <title>PicoGraphDemo</title>
        <script src="picograph.js"></script>
    </head>
    <body style="font-family: Lucida Console, Monaco, monospace;">

        <h1>PicoGraphDemo</h1>

        <!-- Canvas for the graph -->
        <canvas id="graphDemo" 
            style="width: 900px; height:200px; border:2px solid #000000;">
        </canvas>

        <!-- div for legends/labels -->
        <div id="graphLabels"></div>

        <script>
            /* Create graph using picograph */
            var demograph = createGraph("graphDemo", 
                ["Random Y0", "Random Y1"], 
                "units", "graphLabels", 50, 10, 0, true, true);

            /* Update values every second */
            setInterval(updateEverySecond, 1000);

            function updateEverySecond() {
                /* Get new values */
                yrand0 = Math.random()*10;
                yrand1 = Math.random()*10;

                /* Update graph */
                demograph.update([yrand0, yrand1])
            }

        </script>
    </body>
</html>

Documentation

Download picograph.js

function createGraph(canvasID, labels, unit, labelDivID, intervalSize,
    maxVal, vlines=false, timestamps=false, scalesteps=5, vlinesFreq = 1)

Arguments :

canvasID : The id of <canvas> tag for the graph.
labels : List/array of string for label names.
unit : The unit for the values.
labelDivID: ID of the <div> tag to place graph labels/legend.
intervalSize: Amount of pixels to shift the graph on update.
maxVal: Approximate maximum value. Picograph can autoscale, this argument is only for initial value.
minVal: Approximate minimum value. Picograph can autoscale, this argument is only for initial value.
vlines: Show vertical lines.
timestamps: Show timestamps.
scalesteps: Number of scale lines to draw on the graph.
vlinesFreq: Vertical lines and timestamps will be drawn every vlinesFreq*intervalSize. Increase this if the vertical lines are too crowded.

Returns : Graph object.

Graph.update(values)

Arguments :

values : Array of values to add to the graph.

Note

Always use CSS or style to set height and width of the canvas. Do not use height and width attributes of the canvas tag, it may cause scaling issues.

Correct Way:

<canvas id="graphDemo" style="width: 900px; height:200px">

Or you can use CSS flex box, the canvas should be surrounded by

<div style="flex-basis: 0; flex-grow: 1;">

Incorrect Way:

<canvas id="graphDemo" width=900 height=200">

Download Details:

Author: RainingComputers

Source Code: https://github.com/RainingComputers/picograph.js

#javascript

JavaScript Snake Game Tutorial - Develop a Simple Snake Game

Work on real-time JavaScript Snake game project and become a pro

Snake game is an interesting JavaScript project for beginners. Snake game is a single-player game, which we’ve been playing for a very long time. The game mainly consists of two components – snake and fruit. And we just need to take our snake to the food so that it can eat and grow faster and as the number of fruits eaten increases, the length of snake increases which makes the game more interesting. While moving if the snake eats its own body, then the snake dies and the game ends. Now let’s see how we can create this.

JavaScript Project Prerequisites

To implement the snake game in JavaScript you should have basic knowledge of:

1. Basic concepts of JavaScript

2. HTML

3. CSS

Download Project Code

Before proceeding ahead please download source code of Snake Game: Snake Game in JavaScript

Steps to Build the Project – JavaScript Snake game

1. Create Html file

HTML builds the basic structure. This file contains some basic HTML tags like div, h1, title, etc. also we’ve used bootstrap (CDN is already included).

index.html:

Code:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>DataFlair Snake game</title>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
    <link rel="stylesheet" href="static/style.css">
</head>
<body>
    <div class="container">
        <div class ="Jumbotron">
        <h1>DataFlair Snake game using vanilla JavaScript</h1>

            <h2 class="btn btn-info"> 
                Score:   0 
            </h2>

            <div class="containerCanvas">
                <canvas id="canvas" width="500" height="500" class="canvasmain"> </canvas>
            </div>
        </div>
    </div>
    <script src="static/fruit.js"></script>
    <script src="static/snake.js"></script>
    <script src="static/draw.js"></script>
</body>
</html>

We have used simple HTML tags except

#javascript tutorial #javascript project #javascript snake game #simple snake game #javascript

Santosh J

1622036598

JavaScript compound assignment operators

JavaScript is unarguablly one of the most common things you’ll learn when you start programming for the web. Here’s a small post on JavaScript compound assignment operators and how we use them.

The compound assignment operators consist of a binary operator and the simple assignment operator.

The binary operators, work with two operands. For example a+b where + is the operator and the a, b are operands. Simple assignment operator is used to assign values to a variable(s).

It’s quite common to modify values stored in variables. To make this process a little quicker, we use compound assignment operators.

They are:

+=
-+
*=
/=

You can also check my video tutorial compound assignment operators.

Let’s consider an example. Suppose price = 5 and we want to add ten more to it.

var price = 5;
price = price + 10;

We added ten to price. Look at the repetitive price variable. We could easily use a compound += to reduce this. We do this instead.

price += 5;

Awesome. Isn’t it? What’s the value of price now? Practice and comment below. If you don’t know how to practice check these lessons.

Lets bring down the price by 5 again and display it.
We use console.log command to display what is stored in the variable. It is very help for debugging.
Debugging let’s you find errors or bugs in your code. More on this later.

price -= 5;
console.log(price);

Lets multiply price and show it.

price *=5;
console.log(price);

and finally we will divide it.

price /=5;
console.log(price);

If you have any doubts, comment below.

#javascript #javascript compound assignment operators #javascript binary operators #javascript simple assignment operator #doers javascript

CSS Boss

1606912089

How to create a calculator using javascript - Pure JS tutorials |Web Tutorials

In this video I will tell you How to create a calculator using javascript very easily.

#how to build a simple calculator in javascript #how to create simple calculator using javascript #javascript calculator tutorial #javascript birthday calculator #calculator using javascript and html

Rahul Jangid

1622207074

What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

For single line comment in JavaScript we have to use // (double slashes)
For multiple line comments we have to use / * – – * /

<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

#javascript #javascript code #javascript hello world #what is javascript #who invented javascript

WebClues Infotech

1616670795

Hire Dedicated JavaScript Developers -Hire JavaScript Developers

It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.

Does your business need an interactive website or app?

Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.

The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.

Get your business app with JavaScript

For more inquiry click here https://bit.ly/31eZyDZ

Book Free Interview: https://bit.ly/3dDShFg

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