Initial data commit

Task/Knapsack-problem-Continuous/Raku/knapsack-problem-continuous.raku

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+class KnapsackItem {
+  has $.name;
+  has $.weight is rw;
+  has $.price is rw;
+  has $.ppw;
+
+  method new (Str $n, Rat $w, Int $p) {
+    self.bless(:name($n), :weight($w), :price($p), :ppw($w/$p))
+  }
+
+  method cut-maybe ($max-weight) {
+    return False if $max-weight > $.weight;
+    $.price = $max-weight / $.ppw;
+    $.weight = $.ppw * $.price;
+    return True;
+  }
+
+  method gist () { sprintf "%8s %1.2f   %3.2f",
+                            $.name,
+                                $.weight,
+                                        $.price }
+}
+
+my $max-w = 15;
+say    "Item    Portion Value";
+
+.say for gather
+    for < beef    3.8 36
+          pork    5.4 43
+          ham     3.6 90
+          greaves 2.4 45
+          flitch  4.0 30
+          brawn   2.5 56
+          welt    3.7 67
+          salami  3.0 95
+          sausage 5.9 98 >
+        ==> map({ KnapsackItem.new($^a, $^b, $^c) })
+        ==> sort *.ppw
+    {
+        my $last-one = .cut-maybe($max-w);
+        take $_;
+        $max-w -= .weight;
+        last if $last-one;
+    }