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The Programming Expert

The Programming Expert

Code Snippets to Help You Solve Your Programming Headaches Fast

Find Solutions for Your Programs in Python, PHP, HTML, SAS, JavaScript and more.

Become an Expert Programmer through Interactive Examples

JavaScript
jQuery
Python
PHP
HTML
SAS
VBA

JavaScript – Featured Example
How to Rotate an Image using JavaScript

Rotate image

<div id="div1">
  <img id="image1" src="https://theprogrammingexpert.com/wp-content/uploads/example-img1.png">
  <div id="click-me" onclick="rotateImage()">Rotate image</div>
</div>

<script>

var rotateDegrees = 0;  
function rotateImage(){
  rotateDegrees += 30;
  document.getElementById("image1").style.transform = "rotate(" + rotateDegrees + "deg)";
};

</script>
See More JavaScript Examples
jQuery – Featured Example
Example of Using the jQuery clone() Method

Clone box


<style>.box{ float: left; width: 50px; height: 50px; background: #7bbfa2; margin-right: 10px; margin-bottom: 10px; }</style>
<div id="div2">
  <div class="box"></div>
</div><div class="clear"></div>
<div id="click-me2" class="click-me">Clone box</div>

<script>
$("#click-me2").click(function(){
  var clonedP = $(".box:first").clone();
  var randomColor = "#" + (Math.floor(Math.random()*16777215).toString(16));
  clonedP.css("background",randomColor)
  clonedP.appendTo("#div2");
});
</script>
See More jQuery Examples
Python – Featured Example
Reverse String with Recursion in Python
string = "Hello"

def reverse_string(string):
    if len(string) == 1:
        return string
    return reverse_string(string[1:]) + string[0:1]

print(reverse_string(string))

#Output:
olleH
See More Python Examples
PHP – Featured Example
How to Check If String Contains Substring in PHP
$string = "I love to program!";
$substring = "program";

$result = str_contains($string,$substring)   /* $result = true */
See More PHP Examples
HTML – Featured Example
HTML Scrollable Div with Dynamic Content
This is a scrollable div

Keep clicking the button below to add enough divs to show the scrollbar.

Add text


<style>#div5 { height: 100px; width:300px; overflow-y: auto; border: 1px solid #444; padding: 5px; }</style>
<div id="div5">
  <div id="div6">This is a scrollable div</div>
</div>
<p>Keep clicking the button below to add enough divs to show the scrollbar.</p>
<div id="click-me">Add text</div>

<script>

$("#click-me").click(function(){
  $('<div class="new-div">This is a scrollable div</div>').appendTo("#div5");
});

</script>

See More HTML Examples
SAS – Featured Example
Generating Random Integers in a Range Using SAS
data k;
    a = 0;
    b = 10;
    do i = 1 to 10;
        rand_int = rand("integer",0,10);
        output;
    end;
run;
See More SAS Examples
VBA – Featured Example
VBA e – Using Exp() Function to Get Euler’s Constant e
Debug.Print Exp(1); 

'Output:
2.718281828459045
See More VBA Examples

Learn How to Program in Multiple Languages

Check out our recent programming articles below.

Python

  • How to Check if Variable Exists in Python
  • Using Python to Find Closest Value in List
  • Get Week Number from Date in Python
  • How to Subtract Two Numbers in Python
  • Get Difference Between datetime Variables in Python

JavaScript

  • How to Generate a Random Letter In JavaScript
  • pi JavaScript – Get Value of pi from JavaScript Math Module
  • Using JavaScript to Hide Element by Class
  • Using JavaScript to Get the URL Path
  • Grouping By Multiple Properties and Summing Using Javascript

jQuery

  • How to use jQuery to Make an Input Field readonly
  • jQuery slideUp – How to Slide Up and Hide an Element Using jQuery
  • Using jQuery to Add Required Attribute to Input Field
  • Get nth Child with jQuery
  • How to Use jQuery to Change Button Text

PHP

  • php session_destroy() – Delete Session File Where Session Data is Stored
  • php json_encode() Function – Get JSON Representation of Variables in php
  • php print_r() Function- Get Information about Variables in php
  • php switch case – How to Use Switch…Case Statements in php
  • php atanh – Find Hyperbolic Arctangent of Number Using atanh() Function

HTML

  • HTML subscript – How to Lower Text in HTML
  • How to Make an HTML List Without Bullets
  • outerHTML – How to Get and Change the outerHTML Property of an Element
  • innerHTML vs outerHTML
  • HTML superscript – How to Raise Text in HTML

SAS

  • SAS Delete Dataset – Use PROC Datasets to Delete SAS Files
  • SAS Power Function – Exponentiate Numbers with ** in a Data Step
  • SAS Remove Formats from Dataset with PROC DATASETS
  • Get the Row Number in a SAS Data Step with _n_
  • SAS let – Create User-Defined Macro Variables in Your SAS Code

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