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The comparison operator that returns -1, 0, or 1 depending on how the operands compare is often represented as <=> and commonly referred to as the "spaceship op
by mojombo 18y ago
The comparison operator that returns -1, 0, or 1 depending on how the operands compare is often represented as <=> and commonly referred to as the "spaceship operator" because it looks like a flying saucer viewed from the side.
http://en.wikipedia.org/wiki/Spaceship_operator http://en.wikipedia.org/wiki/Spaceship_operator
- jfarmer 18y agoHuh. I never heard it called that before. My background is in math so I always though of it in terms of the sign function: http://en.wikipedia.org/wiki/Sign_function http://en.wikipedia.org/wiki/Sign_function spaceship(x,y) = sign(x-y), for numbers, anyhow.
- jrockway 18y agoFWIW, Larry Wall calls it the Spaceship Operator in "Programming Perl".