pwc280 solution in go

2 files changed, 163 insertions, 0 deletions

diff --git a/challenge-280/pokgopun/go/ch-1.go b/challenge-280/pokgopun/go/ch-1.go
new file mode 100644
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+++ b/challenge-280/pokgopun/go/ch-1.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-280/
+/*#
+
+Task 1: Twice Appearance
+
+Submitted by: [53]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a string, $str, containing lowercase English letters
+   only.
+
+   Write a script to print the first letter that appears twice.
+
+Example 1
+
+Input: $str = "acbddbca"
+Output: "d"
+
+Example 2
+
+Input: $str = "abccd"
+Output: "c"
+
+Example 3
+
+Input: $str = "abcdabbb"
+Output: "a"
+
+Task 2: Count Asterisks
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func twcApr(str string) rune {
+	m := make(map[rune]int)
+	var (
+		c  rune
+		mn int
+	)
+	for i, v := range str {
+		//fmt.Println(string(v), v)
+		if m[v] == 0 {
+			m[v] = -i - 1
+		} else if m[v] < 0 {
+			m[v] = i + 1
+		}
+		if m[v] > 0 {
+			if mn == 0 || mn > m[v] {
+				mn = m[v]
+				c = v
+			}
+		}
+	}
+	//fmt.Println(m)
+	return c
+}
+
+func main() {
+	for _, data := range []struct {
+		input  string
+		output rune
+	}{
+		{"acbddbca", 'd'},
+		{"abccd", 'c'},
+		{"abcdabbb", 'a'},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(twcApr(data.input), data.output)) // blank if ok, otherwise show the difference
+	}
+}
diff --git a/challenge-280/pokgopun/go/ch-2.go b/challenge-280/pokgopun/go/ch-2.go
new file mode 100644
index 0000000000..a07e74a936
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+++ b/challenge-280/pokgopun/go/ch-2.go
@@ -0,0 +1,86 @@
+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-280/
+/*#
+
+Task 2: Count Asterisks
+
+Submitted by: [54]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a string, $str, where every two consecutive vertical bars
+   are grouped into a pair.
+
+   Write a script to return the number of asterisks, *, excluding any
+   between each pair of vertical bars.
+
+Example 1
+
+Input: $str = "p|*e*rl|w**e|*ekly|"
+Ouput: 2
+
+The characters we are looking here are "p" and "w**e".
+
+Example 2
+
+Input: $str = "perl"
+Ouput: 0
+
+Example 3
+
+Input: $str = "th|ewe|e**|k|l***ych|alleng|e"
+Ouput: 5
+
+The characters we are looking here are "th", "e**", "l***ych" and "e".
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 4th August
+   2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func cntAtr(str string) int {
+	a, b := byte('*'), byte('|')
+	c := 0
+	l := len(str)
+	for l > 0 {
+		l--
+		switch str[l] {
+		case a:
+			c++
+		case b:
+			d := len(str[:l])
+			for d > 0 {
+				d--
+				if str[d] == b {
+					l = d
+					break
+				}
+			}
+		}
+	}
+	return c
+}
+
+func main() {
+	for _, data := range []struct {
+		input  string
+		output int
+	}{
+		{"p|*e*rl|w**e|*ekly|", 2},
+		{"perl", 0},
+		{"th|ewe|e**|k|l***ych|alleng|e", 5},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(cntAtr(data.input), data.output)) // blank if ok, otherwise show the difference
+	}
+}