Re^2: Rosetta Code Error or $n // 100

in reply to Re: Rosetta Code Error or $n // 100
in thread Rosetta Code Error or $n // 100

Thanks. Either the code as posted on Rosetta has a typo // instead of || or I misread it. Once I realized that the // should be read as || it all made sense. Thanks again. Those replies were quicker than my thinking process. :(!

Comment on Re^2: Rosetta Code Error or $n // 100

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Re^3: Rosetta Code Error or $n // 100 by choroba (Cardinal) on Mar 24, 2019 at 21:15 UTC
No. `\|\|` and `//` are two distinct operators. The first one checks whether its first argument is true, the second one whether it's defined; if not, they return the second argument. The difference becomes apparent with defined false values like 0: `choroba@still ~ $ perl -wE 'say 0 \|\| 1' 1 choroba@still ~ $ perl -wE 'say 0 // 1' 0` [download] `map{substr$_->[0],$_->[1]\|\|0,1}[\\|\|{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^ARGV,3]`	[reply] [d/l] [select]

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Re^3: Rosetta Code Error or $n // 100
by choroba (Cardinal) on Mar 24, 2019 at 21:15 UTC

||

//

true

defined

choroba@still ~ $ perl -wE 'say 0 || 1'
1
choroba@still ~ $ perl -wE 'say 0 // 1'
0
[download]

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

[reply]
[d/l]
[select]

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