V[ Top ]
values( ) operator, 69
variable interpolation, 44
array variables and, 56
double-quoted strings and, 34
globbing and, 131
regular expressions and, 86
substitute operator and, 88
system( ) and, 143
variable part of format, 116
variables
array, 50
associative array, 66
default values for, 46
naming, 14
scalar, 40
subroutines and, 93
vertical bar (|)
as format field characters, 120
open( ) and, 22, 146
in regular expressions, 82
Very Bad Programming Style, example of, 53
VMS, Perl under, 3
von Neumann, John, xiii
vowels, matching, 78
W[ Top ]
-w command-line option, 40
\w, in regular expressions, 79
-W operator, 113
-w operator, 112
wait operator, 148
Wall, Larry, xiv, xxvi, 1, 104, 107, 179
while statement, 8, 61, 105
example of, 16, 23, 29, 68, 69, 72, 214, 219
last operator and, 101
next operator and, 102
redo operator and, 103
until modifier, 105
whitespace, 4
between array values when interpolated, 56
in formats, 118
in pack format string, 167
in Perl programs, 4
in regular expressions, 79
who command, example of, 3, 143, 145
widgets, 188, 190-194, 202
word boundaries, 83
example of, 11
word characters, in regular expressions, 79
words, and filled fields in formats, 122
write( ) operator, 24, 118
example of, 29, 119, 232
writing reports, 23, 116
X[ Top ]
-X operator, 113
-x operator, 113, 212
x (string repetition) operator, 37
Z[ Top ]
-z operator, 113