September 2017
Beginner
402 pages
9h 52m
English
Content preview from Perl 6 Deep Dive
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Getting the sign of the value
The sign method (also inherited from the Real role) returns either -1 or 1, depending on the sign of the value. Consider the following code snippet:
say 42.sign; # 1say -42.sign; # -1
The result of calling the method on zero is 0, as shown here:
say 0.sign; # 0
The sign method also works with infinities:
say Inf.sign; # 1say (-∞).sign; # -1
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.