Learning Perl by Example

Discussion of Perl with overview of syntax (example)

Discussion of example Perl scripts

Discussion of how to use scalar numeric/string data (examples)

• Show different types of numerical data

• Examples of string data

• Examples of escape characters

Discussion of how to use scalar operators

• numerical and logical (examples)

• string operators

• numerical and string comparisons

Discussion of how to use scalar functions (with examples)

• string operators, variable assignments

• binary assignment

• auto increment, decrement

• chomp, chop usage

• Discussion of how to use scalar interpolation in strings (examples)

• double quoted strings

• Using <STDIN>

Discussion of how to use scalar print (examples)

• Output with print

• Formatted output print

Discussion of how to use scalar arithmetic operators (examples)

Ex: $c = $a + $b;

Discussion of how to use scalar logical operators (examples)

Ex: if ($a && $b) { do something }

Discussion of how to use scalar comparison operators (examples)

- summary of numerical and string usage

Discussion of and definition of arrays

- Literal representation with examples

Discussion of how to create and use arrays/list data (examples)

• How arrays and lists are used

• List constructor operator

• List with variable references

Discussion of how to use array operators and functions (examples)

Assignment examples, use of @a ans qw(...)

Discussion of how to access and use array elements (examples)

- many combinations of ussage

Discussion of how to use array slice (examples)

- many combinations are demonstrated

• Discussion of how to use array functions (examples)

• push and pop

• shift and unshift

• reverse, sort, chomp

Discussion of how to use array scalar and list context (examples)

- usaage of <STDIN> as an array

Discussion of how to use array transforms (examples)

• transform arrays and strings, using split and join

• using sort with subroutine

Discussion of how to merge arrays and strings (examples)

• Selecting list and array elements

• Using Array of Arrays

Discussion of how to create and use a hash (examples)

Use of Keys and Vaules, how to print

Discussion of how to use hash operators (examples)

• creating a hash

• using Keys and Values functions, getting size

• hash of arrays, and how to access

Discussion of how to use control structure blocks (examples)

Sequentail execution

Discussion of how to use "if/else" in a control structure (examples)

- with an without the else block

Discussion of how to use "if true/false" in a control structure (examples)

How to interprete numbers and strings

Discussion of how to use "if/elsif" in a control structure (examples)

"Unless" usage

Discussion of how to use "while" in a control structure (examples)

Using "until"

Discussion of how to use "do" in a control structure (examples)

- do while/until usage

Discussion of how to use "for" in a control structure (examples)

• Compare "for" and "while" usage

Discussion of how to use "foreach" in a control structure (examples)

Example with "reverse" function

Discussion of how to use "last" in a control structure (examples)

How to get out of a loop early

Discussion of how to use "next" in a control structure (examples)

How to skip sections of a loop

Discussion of how to use "redo" in a control structure (examples)

How to jump to alternate sections of a loop

Discussion of how to use "LABEL" in a control structure (examples)

Use of a "label" with "last" and "next"

Discussion of how to use basic I/O with STDIN (examples)

Using default variable $_

Discussion of how to use basic I/O with the diamond <> operator (examples)

Reading from @ARGV array

Discussion of how to use basic I/O with STDOUT (examples)

Ussage of formatted printf

Discussion of how to use basic file I/O (examples)

How to open, read, write, and append to a file

STDIN, STDOUT, and STDERR handles discussed

Discussion of how to use basic I/O file operations (examples)

How to catch errors on file operations: "die" and "warn"

Discussion of how to use basic I/O with files (examples)

Checking file status operators

• Introduction to Regular Expression concepts (examples)
• Matching format
• Usage in "if" statemant

• Using Regular Expressions to match character patterns (examples)
• Using "." and "[..]"

• Discussion of how to use a regular expression with common constructs
• Predefined matching character sets (examples)

• Discussion of how to use a regular expression with grouping patterns
• Matching a sequence, multipliers (examples)

Discussion of how to use a regular expression with greedy patterns (example)

Using general multipliers (examples)

Discussion of how to use a regular expression with anchoring patterns (example)

The "=~" and "!~" operators

Discussion of using a regular expressions with practical examples

• Using variable interpolation
• Using read only variables $1, $2, $3, etc

• Discussion of how to use a regular expression with read only variables (example)
• Using variables $&, $`, $'

• Discussion of how to use a regular expressions using substitution (example)
• Usage s/match/replace/

• Discussion of how to use a regular expression with split.
• A walk through of a complex regular expression example. (examples)

• Discussion of how to format and create a subroutine
• Global variable usage

• Discussion of how to call a subroutine
• Using a "sub" in expressions

• Discussion of how to use subroutine returns with examples
• Implicit and exlicit returns

• Discussion of how to use subroutine arguments
• Passing parameters with @_

• Discussion of how to use subroutine arguments
• Example usage with operators

• Discussion of how to use subroutine internal variables
• The "my" operator usage

• Discussion of how to use program variables
• Use of "strict"
• Why "my" is important

• Discussion of packages and how to use them.
• Use of namespaces

• Discussion of how to use package qualifiers
• Examples of namespace usage

• Discussion of how to create libraries and why they are important
• Example usage of "require" and "use"

• Discussion of how to use the "use function".
• Example of using the "use" function

• Discussion of previously presented operators

• How to use "bitwise" operator

• Discussion of quote operators

• Also miscellaneous operators ". x .. ++ -- _> "

• Discussion of list operators usage.
• Example usage of all list operators

• Discussion of string operator usage
• Example usage of all string operators

• Discussion of file operators
• Examples showing how to use open, read, write, append operators

• Discussion of how to create references.
• Examples of references for scalars, arrays, hashes, subs, globs

• Discussion of how to use dereferences and why they are important
• Example of how references are used to pass variables to a sub

• Discussion of how to create and manage proccesses
• Use of "fork()", "child()", "wait()", "waitpid()", and "kill()'