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home > Web Design Tutorials > Programming Tutorials > CGI Coding Tutorials > CGI STRINGS TUTORIALS

CGI STRINGS TUTORIALS

Comp leeds - String matching - One of the most useful features of Perl (if not the most useful feature) is its powerful string manipulation facilities. At the heart of this is the regular expression (RE) which is shared by many other UNIX utilities.

Archive ncsa uiuc - Strings
There are several ways of quoting strings in perl, corresponding to the three quote characters on the keyboard…

Civeng carleton - Strings and Variable Interpolation
We mentioned earlier that there was significant difference between using the single quote (') and the double quote (") to delimit strings. Now it is time to explain the difference…

Vergil chemistry gatec - Regular Expressions and String Manipulation
We will now turn our focus to applying what we have learned so far in Perl to help us accomplish various tasks that involve string scalars. Regular Expressions are useful and very powerful, and Perl helps you manipulate strings with relative ease.

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Tizag - PERL: Strings
We mentioned earlier that strings are a type of scalar variable, just a single element. A string can range from a single character or letter to an entire paragraph or even an entire text document. Despite each different format, a sting behaves as a single value stored into a variable.

Gossland - String Functions
String functions are functions that operate on strings or that return strings. We will just look at a couple of common ones here…

Fit vutbr - Strings and Variable Interpolation
We mentioned earlier that there was significant difference between using the single quote (') and the double quote (") to delimit strings. Now it is time to explain the difference.

Devdaily - The substr() function
As you can see from this code fragment, the substr function is an important part of the solution. The substr function lets you extract fields of information from strings. All you have to do is define three items…

Garybeene - Strings
Most all programmers understand the concept of a string. For example, the word "cat" is considered a string of three characters "c", "a", and "t". One of Perl's strings is in the manipulation of strings, offering 15 different built-in string functions. I've grouped the functions into five categories, depending on how they manipulate or return information about strings.

Perlaccess - Adding Strings
To add strings, special operators are used. To combine 2 strings, you must use the . operator for the concatenation. The following table outlines the different accumulating operators used widely in perl scripts…

Objectsdevelopment - Working with Scalars
Scalar data are the most basic in Perl. Each scalar datum is logically a single entity. Scalars can be strings of characters or numbers. In Perl, you write literal scalar strings like this…

Doulo - Scalar Variables
Scalar variables have no explicit type. Scalar variables do not have to be declared. Context is very important in Perl. Mathematical operators treat variables as numbers, integers or floating point, depending on the context. String operators treat variables as strings of characters. Conversion between strings and numbers is automatic. Everything in Perl behaves in the most obvious common-sense way. Perl is very intuitive.