Exercises, examples and other material relating to training module P205. This topic is presented on public courses
Perl Programming,
Perl bootcamp
Learning to program in Perl / Perl Programming - Programming Perl - for newcomers to the language
This course introduces you to the Perl programming language.
... http://www.wellho.net/course/ppfull.html [course] |
Learning to Program in Perl / Perl Programming - Learning Perl - whether you're new to programming or 'converting'.
This course covers programming in the ... http://www.wellho.net/course/lpfull.html [course] |
Perl Bootcamp - The fundamentals of the language.
This course covers the fundamentals of the Perl programming
for computer professionals who are new to ... http://www.wellho.net/course/bpfull.html [course] |
In Perl, and in shell programs too, the backtick operator causes the enclosed string to be executed as a command and the result (as generated on STDOUT) ... http://www.wellho.net/mouth/324_The- ... -Perl.html [short article] |
Some languages used adaptive or overridden operator to perform a task depending on the operands - for example in Java, the "+" operator adds numbers, ... http://www.wellho.net/mouth/1849_Str ... sions.html [short article] |
So often, newcomers to programming try to use an "x" operator to multiply - and it doesn't work; they should use "*" in most languages. In Perl ... "x" ... http://www.wellho.net/mouth/254_x-op ... -Perl.html [short article] |
Over the years I've been teaching people about Regular Expressions, I've learnt what does and doesn't work in such tuition. A casual question I saw yesterday ... http://www.wellho.net/mouth/1195_Reg ... rimer.html [short article] |
One of Perl's great strengths is its string handling. It can perform operations on a character-by-character basis, or on strings as a whole. It also has a powerful facility known as regular expressions, which allows the knowledgable programmer to write one line of code that would otherwise be pages long!
This topic is presented on public courses
Perl Programming,
Perl bootcamp
Examples from our training material
| bticks | backtick operator - runs an operating system command |
| cs | Exercise answer - completing a sentence |
| dqs | Single, double and back quotes |
| fil_tar | Filtering a log file for 'lua' |
| finsent | Trimming a sentence |
| firststring | low level string functions demonstrated |
| heredoc | Use of a here document for copyright block |
| pattern | Regular expression learning tool |
| perlstring | Ways of writing strings in Perl |
| pf2 | Filter roads.xyz to match a pattern (using open or die) |
| pfilter | Filter roads.xyz to match a pattern |
| pig | Regular expression - first example with anchors, literals, groups, and counts |
| plook | Simple example of reading and filtering a data file |
| prop2 | Using double quoted strings to change case |
| prop3 | single and double quotes, q and qq strings |
| proper | Case changes on string |
| pws | Use of eq rather that == for string comparison |
| romance | Quoted strings, qq strings and here documents |
| sc | Case insensitive comparison |
| singlename | regex to look for a single name |
Pictures
Perl is a great tool for handling huge data files
Background information
Some modules are
available for download as a sample of our material or under an
Open Training Notes License for free download from
http://www.training-notes.co.uk.
Topics covered in this module
String handling functions.
String handling operators.
Double-quoted strings.
Single-quoted strings.
qq and q strings.
Here documents.
Comparing strings exactly.
Comparing strings to regular expressions.
Summary.
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