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

# (pound sign) 2nd
& (ampersand) 2nd
<=> (spaceship operator)
() (parentheses) 2nd 3rd
+ (plus sign) 2nd
, (comma)
: (colon)
:: (double colon) 2nd
; (semicolon) 2nd
= operator
?: operator
$@ variable 2nd
@_ array
    accessing instance data
    changes reflected
    creating
    dereferencing and
    nested data structures
    passing uninterrupted
    references and scoping
    removing items from
[] (square brackets) 2nd
\ (backslash) 2nd 3rd
_ (underscore)
{} (curly braces)
    anonymous hash constructors
    arrays and
    coderefs and
    dereferencing
    dropping 2nd
    hashes and
    indirect object syntax and
|| operator
||= operator