Paceship Operator N. The Glyph <=>, So-called Apparently Because In The Low-resolution Constant-width Font Used On Many Terminals It Vaguely Resembles A Flying Saucer.

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spaceship operator n.

The glyph <=>, so-called
apparently because in the low-resolution constant-width font used
on many terminals it vaguely resembles a flying saucer. Perl
uses this to denote the signum-of-difference operation.

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