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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 Sort Numbers in Python Without Sort Function
  • Subtract Seconds from Datetime Variable Using Python timedelta() Function
  • pandas startswith() – Check if String Starts With Certain Characters
  • Intersection of Two Lists in Python
  • Get Week Number from Date in Python

JavaScript

  • Using JavaScript to Remove Character From String
  • How to Find the Longest String in an Array in JavaScript
  • Get a List of Prime Numbers Using JavaScript
  • Check if Character is Uppercase in JavaScript
  • Using JavaScript to Add Leading Zeros

jQuery

  • How to Use jQuery to Change Span Text
  • Using jQuery to Change Label Text
  • Using jQuery to Move Element Before Another
  • jQuery blur – How to Use the blur() Method on an HTML Form
  • Get the Height of a Div Using jQuery

PHP

  • php Print Array – How to Print All Elements in Array
  • php array_fill() – Create Array of Length N with Same Value
  • php print_r() Function- Get Information about Variables in php
  • php array_diff() – Find Elements of Array Not Present in Other Arrays
  • php Absolute Value with abs Function

HTML

  • How Do You Select All p Elements Inside a Div Element?
  • How to Filter a List of Divs with a Text Input Bar Using Javascript
  • Can a div Have Two ids?
  • What is the Correct HTML for Making a Text Input Field?
  • How to Make an HTML List Without Bullets

SAS

  • SAS if then else – Write Conditional Expressions for Multiple Conditions
  • IN in SAS – Checking if Variable is in Array of Values
  • SAS yymmdd10. Date Format
  • SAS nodupkey – How to Remove Duplicates with PROC SORT by Key
  • SAS Month Year Format monyyw.

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