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[D]
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[H]
[I]
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[L]
[M]
[N]
[O]
[P]
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object-oriented (OO) programming
object-oriented programming
2nd
objects
2nd
clearing from memory
hash data structures
instance of a class
representation as hashes
octal (base 8) numbers
open system call
opening files
operators
arithmetic
assignment
binding
bitwise
context and
file test
logical conditionals and
precedence of
string
or operator | (bitwise OR)
logical or
control flow, using for
output directing to STDOUT, STDERR and files
functions for
output, formatting with printf
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