whatcanGOwrong

go/pkg/mod/golang.org/x/exp@v0.0.0-20230224173230-c95f2b4c22f2/shootout/k-nucleotide.go

@@ -0,0 +1,143 @@
+//go:build ignore
+// +build ignore
+
+/*
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+    * Neither the name of "The Computer Language Benchmarks Game" nor the
+    name of "The Computer Language Shootout Benchmarks" nor the names of
+    its contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/* The Computer Language Benchmarks Game
+ * http://shootout.alioth.debian.org/
+ *
+ * contributed by The Go Authors.
+ */
+
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"sort"
+)
+
+var in *bufio.Reader
+
+func count(data string, n int) map[string]int {
+	counts := make(map[string]int)
+	top := len(data) - n
+	for i := 0; i <= top; i++ {
+		s := data[i : i+n]
+		counts[s]++
+	}
+	return counts
+}
+
+func countOne(data string, s string) int {
+	return count(data, len(s))[s]
+}
+
+type kNuc struct {
+	name  string
+	count int
+}
+
+type kNucArray []kNuc
+
+func (kn kNucArray) Len() int      { return len(kn) }
+func (kn kNucArray) Swap(i, j int) { kn[i], kn[j] = kn[j], kn[i] }
+func (kn kNucArray) Less(i, j int) bool {
+	if kn[i].count == kn[j].count {
+		return kn[i].name > kn[j].name // sort down
+	}
+	return kn[i].count > kn[j].count
+}
+
+func sortedArray(m map[string]int) kNucArray {
+	kn := make(kNucArray, len(m))
+	i := 0
+	for k, v := range m {
+		kn[i].name = k
+		kn[i].count = v
+		i++
+	}
+	sort.Sort(kn)
+	return kn
+}
+
+func print(m map[string]int) {
+	a := sortedArray(m)
+	sum := 0
+	for _, kn := range a {
+		sum += kn.count
+	}
+	for _, kn := range a {
+		fmt.Printf("%s %.3f\n", kn.name, 100*float64(kn.count)/float64(sum))
+	}
+}
+
+func main() {
+	in = bufio.NewReader(os.Stdin)
+	three := []byte(">THREE ")
+	for {
+		line, err := in.ReadSlice('\n')
+		if err != nil {
+			fmt.Fprintln(os.Stderr, "ReadLine err:", err)
+			os.Exit(2)
+		}
+		if line[0] == '>' && bytes.Equal(line[0:len(three)], three) {
+			break
+		}
+	}
+	data, err := io.ReadAll(in)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "ReadAll err:", err)
+		os.Exit(2)
+	}
+	// delete the newlines and convert to upper case
+	j := 0
+	for i := 0; i < len(data); i++ {
+		if data[i] != '\n' {
+			data[j] = data[i] &^ ' ' // upper case
+			j++
+		}
+	}
+	str := string(data[0:j])
+
+	print(count(str, 1))
+	fmt.Print("\n")
+
+	print(count(str, 2))
+	fmt.Print("\n")
+
+	interests := []string{"GGT", "GGTA", "GGTATT", "GGTATTTTAATT", "GGTATTTTAATTTATAGT"}
+	for _, s := range interests {
+		fmt.Printf("%d %s\n", countOne(str, s), s)
+	}
+}