Learning Perl, 5th Edition

Index

A note on the digital index

A link in an index entry is displayed as the section title in which that entry appears. Because some sections have multiple index markers, it is not unusual for an entry to have several links to the same section. Clicking on any link will take you directly to the place in the text in which the marker appears.

Symbols

! (exclamation mark)

!= (not equal) operator, Comparison Operators

not operator, Boolean Values

" " (quotes, double)

interpolation into patterns, Interpolating into Patterns

in string literals, Strings

# (pound sign), in comments, What’s Inside That Program?

#!(shebang) line in programs, What’s Inside That Program?

$ (dollar sign)

$!, in error messages, Fatal Errors with die

$$ variable, Making and Removing Directories

$& match variable, The Automatic Match Variables

$' match variable, The Automatic Match Variables

$1, $2 match variables, The Match Variables

$^I variable, Updating Many Files, Updating Many Files

$_ default, Perl’s Favorite Default: $_, The given Statement

$` match variable, The Automatic Match Variables

end-of-string anchor in regular expressions, Anchors, Precedence

escaping in double-quoted strings, Hash Element Interpolation

scalar context, Hash Slice

scalar context slices, Array Slice

in scalar variable names, Scalar Variables

% (percent sign)

hash slices and, Hash Slice

modulus operator, Numeric Operators, Picking Items from a List with grep

printing with printf, Formatted Output with printf

referring to an entire hash, The Hash As a Whole ...