Mobile-Web-App

Monday, April 30, 2012

jQuery: .each()

Example of using jQuery .each() function:

<!doctype html>
<head>
 <title>Mobile-Web-App: jQuery</title>
 <meta charset="utf-8">
 <script type="text/javascript" src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
 <script type="text/javascript">

  $(document).ready(function(){

   var myArray = ["A", 100, "EF", [1, 2, 3, 4]];
   
   document.writeln("<p>myArray = " + myArray + "</p>");
   
   $.each(myArray, function(index, value){
    document.writeln("<p>index = " + index + " : value = " + value + "</p>");
   });
   
  });
 </script> 
 
</head>
<body>
</body>
</html>

Wednesday, April 25, 2012

In Javascript, function can be assigned to variable

Example to to assign a Javascript function to a variable like a object.

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Mobile-Web-App: Javascript Exercise - function</title>
<script>

var func = function(i){
 return i*2;
}

function test(){

info = "<p> typeof(func): " + typeof(func) + "</p>"
 + "<p> typeof(func(5)): " + typeof(func(5)) + "</p>"
 + "<p> func(5): " + func(5) + "</p>";

document.getElementById("prompt").innerHTML=info;
}

</script>
</head>
<body onload="test();">
<h1>Mobile-Web-App: Javascript Exercise - function</h1>
<div id="prompt"></div>
</body>
</html>

Tuesday, April 24, 2012

Datejs - JavaScript Date library

Datejs is an open-source JavaScript Date library.

Example:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Mobile-Web-App: Javascript Exercise - Datejs</title>
<script src="http://www.datejs.com/build/date.js" type="text/javascript"></script>
<script>

function test(){

info = "<p><b>Datejs: an open-source JavaScript Date library</b></p>"
 + "<p> Today's date: " + Date.today() + "</p>"
 + "<p> Add 5 days to today: " + Date.today().add(5).days() + "</p>"
 + "<p> Get Friday of this week: " + Date.friday() + "</p>" 
 + "<p> Get March of this year: " + Date.march() + "</p>"
 + "<p> Is today Friday? " + Date.today().is().friday() + "</p>";

document.getElementById("prompt").innerHTML=info;
}

</script>
</head>
<body onload="test();">
<h1>Mobile-Web-App: Javascript Exercise - Datejs</h1>
<div id="prompt"></div>
</body>
</html>

Monday, April 23, 2012

Javascript Exercise - Date object

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Mobile-Web-App: Javascript Exercise - Date</title>
<script>

function test(){

var date = new Date();

info = "<p> date: " + date + "</p>" 
 + "<p> date.getFullYear(): " + date.getFullYear() + "</p>"
 + "<p> date.getMonth() 0-11: " + date.getMonth() + "</p>"
 + "<p> date.getDate() 1-31: " + date.getDate() + "</p>"
 + "<p> date.getDay() 0-6: " + date.getDay() + "</p>"
 + "<p> date.getHours() 0-23: " + date.getHours() + "</p>"
 + "<p> date.getMinutes() 0-59: " + date.getMinutes() + "</p>"
 + "<p> date.getSeconds() 0-59: " + date.getSeconds() + "</p>"
 + "<p> date.getMilliseconds() 0-999: " + date.getMilliseconds() + "</p>";

document.getElementById("prompt").innerHTML=info;
}

</script>
</head>
<body onload="test();">
<h1>Mobile-Web-App: Javascript Exercise - Date</h1>
<div id="prompt"></div>
</body>
</html>

Javascript Exercise - Comparison: == vs ===

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Mobile-Web-App: Javascript Exercise - Comparison</title>
<script>

function test(){

info = "<p> == vs === </p>"
 + "<p> 1 == '1' " + (1 == '1') + "</p>" 
 + "<p> 1 != '1' " + (1 != '1') + "</p>" 
 + "<p> 1 === '1' " + (1 === '1') + "</p>" 
 + "<p> 1 !== '1' " + (1 !== '1') + "</p>";

document.getElementById("prompt").innerHTML=info;
}

</script>
</head>
<body onload="test();">
<h1>Mobile-Web-App: Javascript Exercise - Comparison</h1>
<div id="prompt"></div>
</body>
</html>

FREE eBook: Programming Computer Vision with Python

The website http://www.maths.lth.se/matematiklth/personal/solem/book.html is for the upcoming computer vision book - Programming Computer Vision with Python, by Jan Erik Solem. The book is meant as an entry point to hands-on computer vision for students, researchers and enthusiasts using the Python programming language.

You can visit the eBook in PDF directly here.