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basics of ActivePerl – Part 7

Introduction
Part 7 of my series, Foundations of ActivePerl. In this part of the series, we talk about some common operators ActivePerl. We saw the logical operators. We also saw the award and the same operators. In this section we look at the comparison and arithmetic operators.

Note: If you can not see the code, or if something is missing (broken link, missing image) think, so please contact me at forchatrans@yahoo.com. It is, contact me for any problems that you just read.
operand A operand is a variable or a literal (value) associated with an operator. Consider,

$ myvar = 30

$ myVar is a left operand and right operand is a 30. = Assignment operator, not the same operator. The same operator == and eq when it comes to numbers when it comes to chains, and is used only under the conditions

Remember that.

MyVar $ $ & & & & $ hisVar herVar

There are three operands in the expression above. Then you can speak first, second and third operands.
Comparison Operators A comparison operator compares its operands and its pages are a logical value (true or false) depending on whether the comparison is true or false. If the correct comparison is a logical value true is returned. If false, a logical value FALSE is returned. Another name for the Boolean value is a logical value that is either true or false. The Operator Equality Officer for the numbers
It is ==, operator entered a double mission. The same operator returns true if the operands (numbers) are equal, false otherwise. The inequality operator for numbers
The inequality operator is the opposite of the same operator. The inequality operator,! =. It returns true if the operands are not equal, otherwise false. Let’s look at some examples:

try to read the following code:

use strict;

print “Content-Type: text / html nn”

my $ myVar = 25;
my $ hisVar = 30;
if ($ myVar = $ hisVar)

{print “The values ​​of two variables are not equal. ‘;
}

MyVar is $ 25, $ hisVar 30th The status of how it can be read: if $ myVar is not equal to $ hisVar, then the if block is executed. As the values ​​of variables are not equal ($ myVar! = $ HisVar) returns true. In the following, the values ​​of two variables are equal, then the condition is false and not the if block is executed. use strict;print “Content-Type: text / html nn”

my $ myVar = 50;
my $ hisVar = 50;
if ($ ! myVar = $ hisVar)

{print ‘The values ​​of two variables are not equal. “}

Note: The letter O and the numeral zero are not the same things. If you type the letter O instead of zero (0) You are not the right results. The number zero is the number pad on your keyboard. The letter O is in the Keyboard section. The operator of equal opportunities for channels Commissioner
It is eq, which means the same thing. The same operator returns true if the operands (strings) are equal, otherwise returns false. We have examples. saw the inequality operator for strings
The inequality operator is the opposite of the same operator. The inequality operator is for strings, you know. It returns true if the operands are not equal, otherwise false. Read and try the following code shows:

use strict;

print “Content-Type: text / html nn”

if (“one” does “two”)

{print “The strings are not equal.”}

The Superior
operator than the operator is>. It returns true if the left operand is greater than the right argument. In the following example, the left operand is greater than the right argument. Thus, if the block is executed:

use strict;

print “Content-Type: text / html nn”

my $ variab1 = 60;
variab2 my $ 70 = ;
if ($ variab2> variab1 $ )

{print ‘The value of variab2 exceeds the value of variab1.’;}

Read and try the code above. Greater than or equal to -
operator The operator is greater than or equal> = (it is a sign of higher mathematics courses in mathematics equal sign). It returns true if left operand is greater than or equal to the right argument.
The Less Than operator unless the operator The lower or equal to -
operator less than or equal to the operator, Arithmetic operators
arithmetic operator takes one or two numbers as operands (variables or literals) and gives the answer, similar to what happens in arithmetic.The standard arithmetic operators are plus (+), subtraction (-), multiplication (*) and division (/). To save time, explanation of these four operators, and try to read that, the following examples:

In addition to sample code operator:

use strict; ” / p> print “Content-Type: text nn / html”

my $ var1 = 20;
my $ var2 = 30;

my $ var3 = $ var1 + var2 $ var3 print $

sample code removal:

use strict;

print “Content-Type: text / html nn” my $ var1 = 20;
my $ var2 = 30;

my $ var2 var3 = $ – $ var1;
print $ var3
multiplication operator code example:

use strict;

print “Content-Type: text / html nn”

my $ var1 = 20;
my $ var2 = 30 ;

my $ $ var2 var3 = $ var1 *;
print $ var3

Note that the multiplication operator * and not X.
example department operator code:

use strict;

print “Content-Type: text / html nn”

my $ var1 = 20 ;
my $ var2 = 30

my $ var3 = $ var2 / $ var1;
print $ var3

Note that the division operator /.

The other is the modulus operator (%), increment (++), decrement (–), and operators of negation. You have the particular way each of these operators behave (see below).
learn Modulus Operator The modulus operator divides the first operand by the second operand, and the rest are read and try the following code:

use strict;

print “Content- Type: text / html nn ”

my $ var1 = 17;
my $ var2 = 12;

my $ var3 = $ var1 $ var2%
print $ var3

The modulo operator is the percent sign.
increment operator increment operator is + +. It works with one operand, not two like the others. The operand must be a number. If placed before (prefix) of the operand, it behaves in a way. If it behaves set after (postfix) it addresses.prefix: When there is a prefix, it adds 1 to the operands and the operands increases. Read and try the following code:

use strict;

print “Content-Type: text / html nn”

my $ var1 = 10.5;

my $ var2 = $ var1 + +;
print $ var2

The code is assigned initially to 10.5 var1. Then we have an explanation. In the statement that you have a new variable $ var2, then the assignment operator “+ + $ var1.” What will interest us here “+ + $ var1″, where the increment operator before the variable. The value of the increment operator is assigned to $ var2. If you have tried the code, you would have noticed that the value of $ 11.5 var2 to do so. In other words, if the prefix is ​​used, there are the operands and then increased the operands increases. Note. In the above code is the last value for var1 $ 11.5 and not 10.5

postfix: postfix If so, there are the operands before the addition of 1. The return value is the original value of the operand. The increased value is the new value of the operand that is not returned. Read and try the next code.

use strict;

print “Content-Type: text / html nn”

my $ var1 = 10.5;

my $ var2 = $ var1 + +;
print $ var2; print ‘ print $ var1

If you have tried the code above, you would have noticed that the value to $ var2 and 10, 5 is the final value of var1 is $ 11.5, which confirms that the increase occurs after the value has been returned. The “print”

decrement decrement operator, -, acts as the increment operator, with the difference that it subtracts one instead of adding

. negation operator
This operator is the minus sign, -. It works with an operand (right), he denies the operand as in mathematics. Read and try the following:

use strict;

print “Content-Type: text / html nn”

my $ var1 = 25;

my $ var2 = – $ var1, $ var2 print

We arrived at the end of this part of the series. Remember that everything we learn in this series for traditional Perl. You can try the code with Perl traditional (in their operating systems). If you want to try a sample code with Perl traditional, then you should give something like: #! / Usr / bin / perl (see the documentation for Perl).

Let us stop here. Go to the next episode of the series.

Chrys

Arrival in each part of this series, simply enter the appropriate title below in the search field and click on the page (using the menu, if available) click search:

Getting started with ActivePerl ActivePerl

The basic syntax fundamentals ActivePerl ActivePerl variables

Boolean Logic Boolean logic instructions for ActivePerl

Terms and ActivePerl ActivePerl comparison and arithmetic operators
ActivePerl loop states

ActivePerl ActivePerl hash tables
ActivePerl type variable

part ActivePerl ActivePerl subroutines foreach Presentation
Special variables in the ActivePerl
Basics variable scope ActivePerl ActivePerl
Some sub-programs preset

basics basic error ActivePerl ActivePerl Reference />
file access to essential ActivePerl
send an HTML form with ActivePerl

World War II era was a time of change. There have been many technological advances during this period. This progress can be divided into three categories. They are advanced vector arms progress and strategic progress. This technology would change the face of war forever.

The first category of progress weapon is a very important category. Before the war, the weapons were constantly changing. Weapons of World War have been exceeded. They have always been correct, and in a position of greater distances. In World War I led the soldier with a gun. Rifles are correct, but they take some time to reload. After each shot, you need to recharge. This does not work in World War II. With World War II, the average soldier would be a semi-automatic rifle or machine gun of some sort. It would prove cause bloody battles with more deaths and injuries. Primitive machine guns of World War II were faster, more specifically, for the transportation of smaller and lighter. Small explosives such as grenades, were more lethal and reliable. Anti-tank weapons are not well developed in the beginning of the war. German blitzkrieg attack the tank was so successful for that reason. Anti-tank weapons had to be taken to prevent Germany from winning the war. The soldiers started the realization of high weapons with armor-piercing bullets and bazooka is what worked. Some anti-tank guns fired by other vehicles. They were very effective against tanks. Torpedo was effective. Now they could be aligned and in shallow water. The basic knowledge of German flamethrowers in the First World War was developed into a lethal weapon. These advances in weapons technology of war has changed forever.

The second group of vehicle’s progress is progress. This category can be divided into several sub-categories are subdivided. They are land vehicles, ships and aircraft. This category of technology was one of the major influences of the war. First, we discuss the progress of the vehicle to the ground. The Jeep was invented during the Second World War. It was used as a troop carrier base. After the war, the Jeep has become more popular and then as a production vehicle for public use. Tanks of World War II were very primitive and very inefficient. During the Second World War, the tank was one of the main vehicles used. Before the Second World War, the container was stronger, faster, lighter and stronger. Reservoir was very important during the Second World War. All countries were involved in the war to produce their own models of tanks. At the end of the war, the Allies had developed a new type of tank. She had no big guns on them. There was a troop transport vehicle, which was heavily armored. Carriers were very important in the war. Without transport, there is no effective way to transport troops. All these vehicles have been very important in the history of the war. The next group of vehicles, ships. Naval technology was very primitive at the moment. The radar was a breakthrough in navigation and detection of the enemy. However, radar technology, invented a few years before the outbreak of World War II ships that were equipped with better weapons. U-boats were still very primitive at the moment. Many U-boat crews were killed because they were lost at sea carriers have been very effective. The Germans developed rocket propulsion, the long-range missiles, a threat made. Sonar had been developed. Naval technology was rapidly changing during this time. The third group of technological advances in aircraft. Aviation is very new at this point in time. The first powered flight in 1903, exactly 40 years before the Second World War. By World War I biplanes were the most common type of aircraft. Shortly after World War II, aircraft designers as they could make more efficient aircraft. With World War II biplanes were not as common, but they were still used. Aircraft was stronger, lighter and more efficient. This enabled them to bear arms, allowed them to perform well, as they needed in the war. There were many types of WWII aircraft. The first were the fighters. Fighters were single-engine aircraft, which were usually equipped with a machine gun in the front. They only made one or two pilots. It was the most widely used aircraft in war. Fighter jets were not developed until the end of the war, even after the war. The second type of aircraft is the bomber. Bombers have not been very effective until the Second World War. They were small, so they could not carry large bombs. They had no capacity for long range, making them unattractive in the battle plan. Airliners were relatively new at that time. Commercial jets have also been new, but they were too small. The objective was to obtain an extremely large and heavy aircraft with explosives to fly long distances deep into enemy territory. The bombers have been developed, the largest aircraft ever to that point, which is surprising in itself. Engines were more powerful and lighter. The plane itself was easier than well done. Bombers were without any pressure right now. This was a problem because bombers than ever before. This posed a potential health and safety risks. In 1938 had ten aircraft were still under pressure to win the war. Germany had developed the concept in 1931. America had developed this concept in 1937. This new technology was needed to level flight. The American bomber B-29 Superfortress was the first impression. This aircraft was the most modern of its time. It was just incredible. It was not just pressure, but it was also a control system and remote firing machine guns. The Superfortress bomber was the primary American World War II. He was the type of plane that dropped atomic bombs in Japan made. 3960 B-29 were made. In the early 1960s, the aircraft finally, after years of service at retirement. The B-29 Superfortress was a breakthrough in aviation technology. Air Navigation was very primitive in the Second World War. Pilots use standard equipment to find their way. The aircraft carriers were hard to find in the middle of the ocean. Here, the radar was in a good cause. Shortly before the end of the war, the first jets were produced. These new jets were unreliable and not used until after the war. The last type of technological progress is strategic. The officers were better trained than ever. They had to keep up with technology, hoping to be better than your opponent. Once again, the radar has a major influence in the war. It is better prepared for military defense, giving them a warning. This category is similar weapons. The Manhattan Project was coming near the end of the war. The development of the atomic bomb was one of the most important developments in military history. The United States dropped the atomic bomb destroyed the Japanese cities of new Hiroshima and Nagasaki, which is important as the war ended.a

Now we will discuss the influence of technology in World War II. Technology is worthless until it is activated. Many battles have had different results, not technology. The war had a different result, if this technology had never existed.

First, technology has its flaws. During the attack on Pearl Harbor, the United States had the radar in use. The radar was very new at that time. When the Japanese were on their way, the radar was something. They did not know what you have on the radar, but they knew it was something big. They assumed it was a U.S. bombing fleet returning from a bombing raid. Well, everyone knows the result. This technology gap cost the U.S. much more than eight ships and 188 aircraft costs, he saw 2402nd Most of these men were under the age of twenty. The technology is the war in a positive way. The United States has developed a method for making synthetic rubber. Up to this point, all rubber products from natural rubber. Since natural rubber is harvested mainly in the South Pacific, the Japanese cut off supplies of rubber from the United States in the development of synthetic rubber allowed the Americans to mass produce tires for military vehicles. Without tires, there are no vehicles. Without vehicles, there is no way to effectively fight the war. It’s a big enough impact. Another great technological impact in the Second World War, with aircraft. Before that time, a pilot had left his compass and navigate to the knowledge of the airport to the airport. With the rise of aircraft carriers, was a problem. This was a big problem. As a pilot find an aircraft carrier moving in the middle of the ocean? This problem was solved quickly. Aircraft carriers would be equipped with some special navigation equipment, called a VOR. VOR stands for very high frequency omnidirectional. In other words, the VOR would send information to pilots. This information was sent to Allied aircraft, and the only allied plane. This information could be translated in the directions to find the carrier. Without this technology, about how many planes would only fuel in an attempt to find the carrier believing. This technology is changing flight ever. things like the microwave, plastic, and computers were developed in the 1940s. The first helicopter was also successful in 1940. The radio was very new at that time. The first electron microscope was developed in the 1940s. World War II was to change not only a time of military technology. Rapidly changing technology in all areas. The technological advances of World War II were great. This progress has been very influential, not only during the war, but in ideas and future developments in technology. Many things can be accredited to the technology of World War II. This progress is likely to change after World War II, but the war changed forever.

If you upgrade to Windows 7, chances are you’ve discovered some nice improvements along the street. Do you have the “search filter” yet discovered? If not, head on over to Windows Explorer by clicking the Start button and choose Open Windows Explorer. Once started, you will see in the upper right corner where you will find the search bar.

looks at first glance, the search bar as the old. However, once you enter your search a little menu pops up with a message of ‘adding a search filter “and a number of words underlined in blue, such as: type, modification date, type and size. Clicking on any of these words is the command followed by a colon (for example, “child”) into the search box and opens a new display additional options. Note that words depend on where you look and look for available properties dependent. Also, you can set options such as:. Author, name, duration, start date, date and tags

If the search filter nature, making up your mind is

Calendar – Limits the results to entries in the calendar of the communication – Limits results of the to entries related to the Communications Contact – Limits the results to contacts document – Limits the results to documents and spreadsheets, e-mail – Limit results E-Mail RSS – Limits the results of RSS files – Limits the results to files of the game – Limits the results to play Instant Message – Limits the results of Instant Messaging

. p>

specific search filter when you search for specific folders. For example, if you click on video and enter a term into the search box, you will receive with search filters, such as length, creation date and type. If you know the desired video is short, you can restrict the results to be short (1-5 minutes). “On the other hand, if you know the video is long, try a filter more like” Long (30-60 minutes) or very long (over 60 minutes). Limit the results based on known criteria such as length of the video, it’s easier to find relevant results.

Although the search filters Windows7 again, the concept is not new. Microsoft Word has users look at the properties for some time now. Search filters allow you to find files on file properties in Windows Explorer. For example, if you saved the comments in the properties of a Word document, you can use the following syntax to find this document on his observations: Genre: comment = Documents: Windows then refine your search results Word documents with the comments in the file properties stored.

The new search filters are useful to help you find files by various criteria. Take time to become familiar with these different options so that the next time you need to find a file, you know how to find it fast with search filters.

Launching a website needs a hosting for web. It is the place where your domain will be put in the World Wide Web. It will help you a lot so that finally you can have your own website and can be used for any purpose you intend to have. However, it would be better for you to know anything related to hosting first before you decide to choose one.

Web hosting is classified into three. The first one is shared web hosting for personal websites and blogs. It is a single web master is shared to many webmasters at once. The second type is Virtual Private Server (VPS) Web Hosting for Business in which one single web master is shared to multiple websites but it is more powerful and expandable. The last one is called dedicated web hosting for Enterprise. This most powerful hosting enables the user to have access to private server. Or in other words, you lease your own web server and it is located in remote location.

Before you log in to particular hosting, checking the website hosting review of the hosting provided by Webhostingfan.com will give you advantages. Get the promo hosting also by visiting the mentioned website.

Tablet PC is actually a type of PC or laptop, with the difference that with the touchscreen or graphics tablet instead of hybrid control computer with a mouse or other peripheral device entry. Initially, when the Tablet PCs were introduced, their cost was high, but with increasing competition and demand Tablet PCs cheap now on the market at a price of 0 or even less than that and offers standard quality.

In view of the dimensions, the standard size of the Tablet PC for a low price than in the order of 12 “but believes the Tablet PC come with larger than this, but the factory computer world look 12″ to the default size of the Tablet PC. It is the factor of energy consumption, are significantly lower for the tablet PC 12 is relatively small in size and weight, the standard size makes. The Tablet PC at a reasonable price of 12 “is very light, they made another resolution of 1200 × 800, which makes it challenging to buy, and the temptation! There are various software solutions for the variety of Tablet PCs cheaply by several companies, such as Windows XP Tablet PC Edition from Microsoft, Apple Mac OS X, there are “ModBook” is improved version of the MacBook .

Highlighting Kit, Convertible and the other is the slate system, two types of Tablet PCs that are currently on the market. Basically, the slate system, only the display is to be composed, while the convertible type system seems like a notebook or laptop that can be rotated or maybe even folded. However, the software for both the nature of the system, providing the same Windows XP.

If you are looking for a Tablet PC at low prices should always keep a few things in mind. The quality standard is a key factor in buying even a cheap tablet PC and choose so that those who meet all the necessary functions of them. First, it should allow both the storage and the writing of data and information through the digital ink with Windows Journal. Battery backup is the most requested feature, guaranteed in a Tablet PC at low prices, so that the Tablet PC for a long battery life and performance of at least four hours of searching.

The Tablet PC at low cost for easy portability should be thin and easily with the privilege of inputs for the pen tip with a stick and keyboard. CPU frequency must be at least 1.0 GHz with 2 GB of memory, and even the purchase of a tablet PC cheap. The Tablet PC at low prices are very advantageous to use the unconventional atmosphere like on the bed or in the queue, and are comparable with conventional laptops to save information on non-character basis, as diagrams.