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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

  • pandas cumprod – Find Cumulative Product of Series or DataFrame
  • Remove Time from Datetime in Python
  • How to Remove Vowels from a String in Python
  • Python cosh – Find Hyperbolic Cosine of Number Using math.cosh()
  • pandas floor – Find the Floor of a Column Using Numpy floor

JavaScript

  • Using JavaScript to Get the Domain From URL
  • Reverse Words in a String JavaScript
  • Using JavaScript to Change the Image src
  • JavaScript Check if Attribute Exists in HTML Element
  • JavaScript Opacity – How to Change the Opacity of an Element Using JavaScript

jQuery

  • jQuery has – Check if an Element Has Other Elements
  • Resizing an Image Using jQuery
  • Using jQuery to Get Text Length
  • jQuery before – Insert HTML Before Another Element
  • Using jQuery to Add Option to Select List

PHP

  • Using function_exists() to Check if Function Exists in php
  • Using strtoupper() in php to Convert String to Uppercase
  • php max – Find Maximum Value of Array in php
  • php cosh – Find Hyperbolic Cosine of Number Using php cosh() Function
  • How to Reverse Array in php Without a Function or Other Variables

HTML

  • How to Make a Div Scrollable in HTML
  • How to Make an HTML List Without Bullets
  • HTML span width – Set the Width of a Span in HTML
  • What is the Correct HTML for Inserting a Background Image?
  • Making a Checkbox Disabled in HTML

SAS

  • =">SAS Greater Than or Equal to with GE or >=
  • SAS Remove Formats from Dataset with PROC DATASETS
  • SAS floor – Round Down to Floor of Number in a SAS Data Step
  • IN in SAS – Checking if Variable is in Array of Values
  • SAS max() Function – Find Maximum Value Across Columns in Data Step

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