Perl5 リファレンス


defined 未定義値 undef でない値かどうかを Boolean 値で返します。
dump 即座にコアダンプする。
eval In the first form, the return value of EXPR is parsed and executed as if it were a little Perl program.
formline This is an internal function used by `format's, though you may call it, too.
local You really probably want to be using `my' instead, because `local' isn't what most people think of as "local".
my 変数を局所化します。
reset Generally used in a `continue' block at the end of a loop to clear variables and reset `??' searches so that they work again.
scalar スカラー値に強制変換する。
undef Undefines the value of EXPR, which must be an lvalue.
wantarray Returns true if the context of the currently executing subroutine is looking for a list value.