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PHP Tutorial – checkbox form

admin — Sun, 05 Feb 2012 12:52:20 +0000

Let us assume that you want to present a user with two or more than 2 choices and want him to take action based upon one or more selections he makes in the checkboxes.

To give you more exact example look at the following picture, where you are presented to choose one or more programming languages that you like.

Let us say you choose PHP and Javascript

If you hit the submit button the program should give the output something similar to

Here is the example code to do it.



Which Programmming Languages do you like ? 


 Csharp 


 PHP 


 Javascript






if (isset($_POST['checkform']))
{

if  ($_POST['csharp'] == ‘Yes’)

{

echo “You like csharp”; echo “
”;

}
if  ($_POST['php'] == ‘Yes’)

{

echo “You like PHP”;echo “
”;

}
if  ($_POST['javascript'] == ‘Yes’)

{

echo “You like javascript”; echo “
”;

}

} ?>

You may like to check PHP Tutorial, if you are looking for getting started.

Javascript Regular Expression – Greedy Vs Lazy – Quiz

admin — Sat, 04 Feb 2012 15:40:47 +0000

Take the following quiz for enhancing your understanding of the Regular Expression – Greedy Vs Lazy. You may like to ready the Javascript Regular Expression – Greedy Vs Lazy, before you take up this quiz.

Q1. Consider the following section of the code

var pattern = /^.*([\d]+)/;
var str = “Which year was known as great depression – 1929″;
var newstr = str.replace(pattern, “$1″);

what is the value of newstr

A. 1929
B. 9
C. Which year was known as great depression – 1929
D. 29

Q2. Consider the following section of code

var pattern = /^.*([\d]*)/;
var str = “Which year was known as great depression – 1929″;

What is captured in the parenthesis

A. 1929
B. 9
C. Nothing
D. Which year was known as great depression – 1929

Try to do the above two questions yourself before you check the answers. The answers are at the end of this topic. You may also like to check

1. Javascript Tutorial for beginners

2. Regular Expression In Javascript on amazon

Answers and explanations
Q1. B
We are tempted to think that the parenthesis will capture 1929. However the .* keeps
matching anything including the digits. Finally to make the match successful the last
digit 9 is left to match to [\d]+. This is captured by the parenthesis.
Q2. C
Note that the our greed to attempt to capture 1929 gives a blank result. All the literals
are captured in .* and for the search to be successful, no match is required

Javascript Regular Expression greedy vs lazy

admin — Sat, 04 Feb 2012 15:15:32 +0000

We will understand the concept of greedy Vs. Lazy regular expression with the help of
an example.

Consider part of an html page consisting of some words in bold. Here is an example

This is an example page

First Bold
Something here
Second Bold
Something else here
Finish

Now, we want to write a regular expression which will match First Bold
in the above example. To do this we use the following regular expression
/.*/
Hoping it to work. This regular expression, however, matches the following part of the
subject
First Bold
Something here
Second Bold
Why ? To understand it we would like to understand the mechanism of match. In the
regular expression /.*/ . The regular expression first looks for in the
subject. Once is found, .* all way to the end of the subject. In the process, it eats
up the whole subject, right all way to the finish
. When its stomach is full, it looks
in the regular expression, for what next to match. It is . So what it does is
backtracking.

It tries to match < of in the regular expression with > of

in the subject. The
match fails. Now it tries matching < of with p of

. This also fails. It keeps
doing this till it matches < of in the regular expression with < of

in the
subject

If we run this code we get the following output

string2[0] is : First Bold Something here Second Bold

Notice that, since we are displaying the output on an html, we do not see and .
We instead see the actual bold letters. But you should be able to feel the idea. The
regular expression /(.*)<\/b>/; matches all the text between the first and all
way to the last .

If we change the statement

var pattern1=/(.*)<\/b>/;
to
var pattern1=/(.*?)<\/b>/;

we get the following output

string2[0] is : First Bold

You may also like to take a small quiz about Regex ( greedy vs lazy)

Also check

1. Javascript Tutorial for beginners

2. Regular Expression In Javascript on amazon

Javascript Textarea Tutorial

admin — Sat, 04 Feb 2012 13:34:00 +0000

Javascript texarea is useful construct that you can use to input a large area of text for further processing and output. A typical example could be entering simple text for further processing. In today’s tutorial let us learn about Javascript Textarea with an example.

In the example we will present user with a text area and a button. We need to accomplish some task, based upon clicking the button. Let us get started. Copy the following text and start seeing its effects.

<br /> This example is provided by reference designer. Please enter some text here<br />

If you are a beginner – you may like to take a look at the Javascript Tutorial.

How to find the Number of Cores and Logical Processors using C#.net

admin — Tue, 31 Jan 2012 03:00:01 +0000

This is a pre cusrsor to something more that we are trying to achieve. The goal is to develop a simple code that will find the processor and memory details and then will benchmark the computer. We will then let users run this program to help him benchmark and compare the processors.

Today we will show you how to get the information about the number of processors. Here is the code that has been compiled in C#.Net ( 2010 Express Edition).

A note on compilation.

- Copy paste this code in console application and then go to Projects -> Add reference – > .NET – > System.Management

Happy coding.

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Management;
namespace ConsoleApplication1 { class Program { static void Main(string[] args) { foreach (var item in new System.Management.ManagementObjectSearcher("Select * from Win32_ComputerSystem").Get()) { Console.WriteLine("Number Of Physical Processors: {0} ", item["NumberOfProcessors"]); } // Number of Cores int coreCount = 0; foreach (var item in new System.Management.ManagementObjectSearcher("Select * from Win32_Processor").Get()) { coreCount += int.Parse(item["NumberOfCores"].ToString()); } Console.WriteLine("Number Of Cores: {0}", coreCount); // Number of Logical Processors foreach (var item in new System.Management.ManagementObjectSearcher("Select * from Win32_ComputerSystem").Get()) { Console.WriteLine("Number Of Logical Processors: {0}", item["NumberOfLogicalProcessors"]); }
Console.ReadLine(); } } }

Allegro PCB Viewer

admin — Mon, 30 Jan 2012 01:09:19 +0000

If you have been given an Allegro PCB Design to review and you do not have the access to complete Allegro Design Suites, you may like to download the Allegro PCB Viewer from http://www.cadence.com/products/pcb/Pages/downloads.aspx. The Allegro PCB viewer is a free tool to view the Allegro PCB Design files.

If you have the complete tool available to you, you may like to check the Allegro PCB tutorial.

New Calculators – Post errors in Comment

admin — Sun, 22 Jan 2012 02:47:34 +0000

We have upoloaded a large number of new Calculators for daily use. In case you come across any errors in these calculators, please mention them in the comment section here.

Here goes the list of new Calculators

1. Cylinder Lateral Surface Area Calculator
2. Cylinder Total Surface Area Calculator
3. Cone Lateral Surface Area Calculator
4. Cone Total Surface Area Calculator
5. Cone Slant Height Calculator
6. Acre to Square Meter Calculator
7. Acre to Square Miles Calculator
8. Square Kilometers to Acres Calculator
9. Hectare to Acres Calculator
10. Square Miles to Hectare Calculator
11. Hectares to Square Feet
12. Hectares to Square Kilometers
13. Hectares to Square Yards
14. Hectare to Sq Yards
15. Square Meter to Square Yards
16. Square Meter to Sq Inch
17. Square Km to Sq meter
18. Cubic Meters to Galons
19. Square Feet to Sq Inches

AMD Athlon ii P340 Processor review

admin — Mon, 01 Nov 2010 18:12:22 +0000

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AMD has launched in the market an Athlon II dual-core processor P340. The features of this processor make it a great competition for the recently released Intel Pentium P6100 series. Let’s have a look at the characteristics that make the Athlon II P340 a good option for customers in their search for a good processor for their laptops and/or notepads. The Athlon II P340 has a frequency of operation of 2.2 GHz. Another feature we should mention is that it has a CPU multiplier is of 16. When compared to the Intel Pentium p6100 series, the Athlon II P340 processor offers a memory controller of the DDR3, this means that the there is a reduction of the memory interval and it also means that there is an improvement in the processor as a whole. The dual-core has been built with 45nm lithography technology, and has a data width of 64 bits. It also offers a level 2 cache memory separated in the dual core and with 512 KB each level. Another striking characteristic of the Athlon II P340 processor is that the power consumption is of only 25 watts, the lowest power consumption processor when compared to other CPUs in the same market segment.
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The Athlon ii supports Hardware virtualization. The advantage of such feature is that you will be able to have different operating systems in the same device without having to cope with a decrease in performance. One thing you should take into account when considering to purchase a laptop with this type of processor is that it has a revolutionary technology to avoid heating problems (Powernow and Cool’n’Quit). Some other things that the Athlon II P340 processor includes are an adjustable controller, hardware to help you control temperature of the processor, and some integration based samples. The new dual-core processor from AMD also includes an outstanding feature to help you protect the timer support. The reason why I believe this is a good processor to get is because all the available graphic cards in the market can be used with the Athlon II P340. Nevertheless, as the speed for processing data is not much it does not offer an excellent performance when the customer uses applications that require multi threading. You will find this type of Athlon II P340 processor in brands such as Sony Vaio, HP and Acer, but not all models come with a dual-core processor P340.

Intel Pentium P6000 P6100 and P6200 processors

admin — Wed, 27 Oct 2010 22:30:36 +0000

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Intel Pentium P6000 P6100 and P6200 processors

The Intel pentium P6000, P6100 and P6200 are based upon the Arrandale architecture. It is intel’s attempt to keep the Pentium brand alive and at the same time offer the benefits of the Arrandale Architecture.

If you are not aware of the Arrandale architecture, it is basically the same architecture that powers the intel core i3, core i5 and core i7 processors, which means that they have integrated memory controller and a DMI bus to communicate with the chipset.
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The core frequency of P6000 is 1.86 GHz while that of the P6100 and P6200 are 2 GHz and 2.13 GHz respectively. The intel P6000 series does not have turbo boost functionality as in the core i5 processors. Also, there is no Hyperthreading supported in the intel P6000 series processor.

The Intel P6000 series contain 3 MB of smart cache. Built with 32 nm technology, the intel Pentium P6000, P6100 and P6200 processors have a moderate TDP rating of 35 Watts.

The P6000 series has integrated DDR3 memory controller that can support a maximum of 8 GB DDR3 memory.

Honda CRV 2012

admin — Sun, 24 Oct 2010 14:56:26 +0000

Honda CRV 2012 Discussions
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This topic has been started with the intention of starting the discussions about the Honda CRV 2012. You may have several questions in your mind. And some of you may have the right answers. If you have any information please contribute by commenting below. If you have some questions, you may still comment and ask any question relevant to Honda CRV 2012. All relevant question and most answers will be approved.

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Here are some common questions that you may have in your mind about Honda CRV 2012

Q. Who are the nearest competitors of the Honda CRV 2012 ?

Q. Do we have any pricing information or any guess about the Honda CRV 2012 ? How about previous year models ?

Q. Who are different trims and variations of Honda CRV 2012 ?

Q. Do we have EPA Fuel Economy figures available for the Honda CRV 2012 ? How about older models ?

Q. What safety rating has been given to the Honda CRV 2012 ?

Q. Mechanically what are the engine horsepower figures and what type of transmission (manual, automatic or contnuous) for the Honda CRV 2012 ?

Q. When do we expect the Honda CRV 2012 to be available ?

Once again, if you know answer to these questions, please comment. If you have more questions. Please feel free to ask it in the comment itself.