F

Index

[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]

each iterator
     for constructs
     loops
     strings
each method, iterating
     directories
     files
each-byte iterator, strings
Easter, determining data of
editors
     emacs
     jEdit
     SciTe
     support for
     TextMate 2nd
     vim
eigenclasses
Elements (Nitro)
else clauses 2nd
else statements
elseif keyword, if statements
emacs
email
     attachments, encoding/decoding
     mail-news gateways
     sending via SMTP
embedded data, reading
embedded documentation 2nd
embedded Ruby (erb)
empty? method, threads
encapsulation, defining
encoding/decoding, attachments
encodings (Unicode)
encryption
     rot13 text, encoding/decoding in strings
    strings
         crypt method
         rot13 text
end keyword
end markers, here-documents
enq method, threads
ensure clauses, begin-end blocks
enumerables, converting to mathematical sets
environment variables
     getting
     inporting as globals
     message catalogs
     setting
    storing
         as arrays
         as hashes
EOFErrors, binary files
epochs
     convertring
     dates/time, validating
     microseconds
     pre-epoch dates
     seconds
eql? method, testing object equality
equal sign (=)
     = (equality) operators
     == (equality operators) 2nd 3rd
     === (relationship) operators 2nd 3rd
     =end markers, embedded documentation
equal? method, testing object equality
equality, testing objects
erb
err variables, exceptions
error handling, exceptions
     begin-end blocks
     else clauses
     err variables
     raise statements
     rescue clauses 2nd
     retry keyword
Etc module
Euler circuits, graphs
Euler paths, graphs
eval function, dynamically evaluating code
evaluating code dynamically
exceptions
     begin-end blocks
     else clauses
     err variables
     handling, threads
     raise statements
     rescue clauses 2nd
     retry keyword
exclamation points (!), identifiers
exec method
     external programs, running
     PostgreSQL
executable_real? method, file ownership
execute_command method
execute_query method
executed definitions
exist? Method, checking file existence
exit codes, getting/setting
exit method
     exit codes, getting/setting
     threads
exit statements, Fahrenheit and Celsius temperature conversion sample program
exit! method, process manipulation
explicit conversions, strings
explicit messages, sending objects in
explicit numeric conversion
exponentiation (numbers)
expressions
     interpolation
     orientation
     regular
     strings, embedding in
     syntax errors, blankspaces
extend method
     mixing modules into objects
     module functions, appending
extend_object method
external database connections
     DBI wrappers
     LDAP
     MySQL
     Oracle
     ORM
     PostgreSQL
     SQLite
external programs, running
     command output substitution
     exec method
     input/output manipulation
     process manipulation
     system method