The subscript separator for multidimensional array emulation. If you refer to a hash element as
$foo{$x,$y,$z}it really means
$foo{join($;, $x, $y, $z)}But don't put
@foo{$x,$y,$z} # a slice--note the @which means
($foo{$x},$foo{$y},$foo{$z})Default is "\034", the same as SUBSEP inawk. If your keys contain binary data there might not be any safe value for$;.
Consider using "real" multidimensional arrays as described inperllol.
Mnemonic: comma (the syntactic subscript separator) is a semi-semicolon.
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