Arithmetic evaluation: Difference between revisions
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SqrtNegInf (talk | contribs) m →{{header|Perl 6}}: flat before reduction |
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=={{header|Perl 6}}== |
=={{header|Perl 6}}== |
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{{ |
{{Works with|rakudo|2015.12}} |
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{{broken|Perl 6}} |
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<lang perl6>sub ev (Str $s --> Num) { |
<lang perl6>sub ev (Str $s --> Num) { |
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my sub sum ($x) { |
my sub sum ($x) { |
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[+] product($x<product>), map |
[+] flat product($x<product>), map |
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{ minus($^y[0] eq '-') * product $^y<product> }, |
{ minus($^y[0] eq '-') * product $^y<product> }, |
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|($x[0] or []) |
|($x[0] or []) |
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my sub product ($x) { |
my sub product ($x) { |
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[*] factor($x<factor>), map |
[*] flat factor($x<factor>), map |
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{ factor($^y<factor>) ** minus($^y[0] eq '/') }, |
{ factor($^y<factor>) ** minus($^y[0] eq '/') }, |
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|($x[0] or []) |
|($x[0] or []) |
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