Ashish Awasthi's Blog

Saturday 21 July 2018

R tutorial - Introduction to R Programming

This R tutorial is designed for beginners who know the basics of programming and want to learn R programming.

R is an open-source programming language utilized for machine learning, factual examination, designs portrayal and detailing. R is unreservedly accessible under GNU General Public License. To learn R programming you ought to have an essential comprehension of any programming language.

The centre of R is an interpreted programming language that is the reason it doesn't require any compiler to run the code. R permits joining with the methodology written in the C, C++, .Net, Python or FORTRAN languages for effectiveness.

R was developed by Ross Ihaka and Robert Gentleman in Auckland in 1993 and supported by a group of programmers. R is the most used programming language for data analysis and statistical purposes. Like other programming languages, R supports conditional statements, looping, recursion and numerous different highlights like information representation, data visualization.

R supports number-crunching, object-oriented programming, procedural programming with functions, and has an extensive arrangement of administrators for taking care of Arrays and grids.

To start learning R programming, first of all, get R GUI Software that compiles and runs the R language.

Tuesday 10 July 2018

Styling HTML elements using CSS

In this post, we'll learn about styling HTML elements using CSS code, CSS stands for Cascading Style Sheet. It is used for changing the look of HTML components on the page and is very important for designing a beautiful user interface. After this tutorial, you'll be able to learn the basics about CSS and can use it in any type of web application or technology to beautify components.

CSS can be used in HTML pages in 3 ways, Here we'll see how to style HTML elements.

Inline CSS

Inline CSS is used to decorate a single HTML element and makes use of style attributes. See this example of styling HTML paragraph tag using inline CSS

<!DOCTYPE html>
<html>
<body>

<p style="color:red;font-size:20px;font-weight:bold;">This is a Red bold Paragraph</p>
<p style="color:darkgreen;font-size:15px;font-style:italic;">This is a green italic Paragraph</p>

</body>
</html>

Try this in our HTML Editor

Internal CSS

Internal CSS is used to decorate elements in a single HTML page. It is defined between <style> - </style> tag in <head> section. See this example of using internal CSS in an HTML page

<!DOCTYPE html>
<html>
<body>

<style>
p{
color:red;
font-size:20px;
font-weight:bold;
border: 1px solid blue;
padding: 50px;
background-color:yellow;
}
</style>

<p>This is a Red bold Paragraph with a border and background color</p>

</body>
</html>

Try this in our HTML Editor

External CSS

External CSS is used to decorate many HTML pages, Like for designing a website's template we use external CSS, In this, we create a file with .css extension and this file contains CSS code for all page elements.

A CSS file looks like this - style.css

p{
color:red;
font-size:20px;
font-weight:bold;
border: 1px solid blue;
padding: 50px;
background-color:yellow;
}
h1{
color:blue;
}

And this is how it is attached to the HTML page

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" href="style.css">
</head>
<body>

<p>This is a Red bold Paragraph with a border and background color</p>
<h1>This is the H1 heading</h1>
</body>
</html>

After this information, you'll be able to understand the basics of CSS and get an idea of using styles with any other framework.

Cheers :) Happy Learning

Wednesday 4 July 2018

Skinning ADF Dialog box inside popup component

In this post, we'll see how to change the look n feel of popup component by skinning the ADF dialog box using CSS code in ADF Application. Skinning plays important role in designing a better user interface, You can read more about ADF Skinning here.

Default ADF dialog component inside popup looks like this

And here I'll show you how to customize the look of dialog box using ADF Skin (CSS Code), I hope you all know about creating ADF Skin file. After creating the Skin file put the CSS script mentioned below in that file.

See ADF Skin code used to customize ADF dialog box.

/**Change background color and border color of dialog**/
af|dialog {
    background-color: White;
    border-color: #4267b2;
}

/**Change dialog header style**/
af|dialog::header, af|dialog::header-end, af|dialog::header-start, af|dialog::title {
    color: #FFFFFF;
    text-align: center;
    background-color: #45619d;
    background-image: none;
    font-family: Arial;
    padding: 3px;
}

/**Change dialog button styler**/
af|dialog af|button {
    background-color: #4267b2;
    text-align: center;
    vertical-align: middle;
    color: White;
    background-image: none;
    border: #4267b2 1.5px solid;
    width: 60px;
}

af|dialog af|button::link {
    background-color: #4267b2;
    text-align: center;
    vertical-align: middle;
    color: White;
    background-image: none;
    border: #4267b2 1.5px solid;
    font-family: Arial;
}

/**Set hover event properties for dialog button**/
af|dialog af|button:hover {
    background-color: red;
    text-align: center;
    vertical-align: middle;
    color: White;
    background-image: none;
    border: #528cff 1.5px solid;
    width: 60px;
}

af|dialog af|button::link:hover {
    background-color: #528cff;
    text-align: center;
    vertical-align: middle;
    color: White;
    background-image: none;
    border: #528cff 1.5px solid;
    font-family: Arial;
}

/**Change default close icon of dialog**/
af|dialog::close-icon-style {
    background: none;
    background-image: url("../../lblue_cross_16.png");
    height: 17px;
}

af|dialog::close-icon-style:hover {
    background: none;
    background-image: url("../../red_cross_16.png");
    height: 17px;
}

And after skinning, ADF dialog box looks like this