pwc341 solution in go

2 files changed, 174 insertions, 0 deletions

diff --git a/challenge-341/pokgopun/go/ch-1.go b/challenge-341/pokgopun/go/ch-1.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-341/
+/*#
+
+Task 1: Broken Keyboard
+
+Submitted by: [39]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a string containing English letters only and also you are
+   given broken keys.
+
+   Write a script to return the total words in the given sentence can be
+   typed completely.
+
+Example 1
+
+Input: $str = 'Hello World', @keys = ('d')
+Output: 1
+
+With broken key 'd', we can only type the word 'Hello'.
+
+Example 2
+
+Input: $str = 'apple banana cherry', @keys = ('a', 'e')
+Output: 0
+
+Example 3
+
+Input: $str = 'Coding is fun', @keys = ()
+Output: 3
+
+No keys broken.
+
+Example 4
+
+Input: $str = 'The Weekly Challenge', @keys = ('a','b')
+Output: 2
+
+Example 5
+
+Input: $str = 'Perl and Python', @keys = ('p')
+Output: 1
+
+Task 2: Reverse Prefix
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"strings"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func bk(str string, keys []rune) int {
+	l := len(keys)
+	var cnt, i int
+	for s := range strings.SplitSeq(strings.ToLower(str), " ") {
+		for i = 0; i < l; i++ {
+			if strings.ContainsRune(s, keys[i]) {
+				break
+			}
+		}
+		if i == l {
+			cnt++
+		}
+	}
+	return cnt
+}
+
+func main() {
+	for _, data := range []struct {
+		str    string
+		keys   []rune
+		output int
+	}{
+		{"Hello World", []rune{'d'}, 1},
+		{"apple banana cherry", []rune{'a', 'e'}, 0},
+		{"Coding is fun", []rune{}, 3},
+		{"The Weekly Challenge", []rune{'a', 'b'}, 2},
+		{"Perl and Python", []rune{'p'}, 1},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(bk(data.str, data.keys), data.output)) // blank if ok, otherwise show the difference
+	}
+}
diff --git a/challenge-341/pokgopun/go/ch-2.go b/challenge-341/pokgopun/go/ch-2.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-341/
+/*#
+
+Task 2: Reverse Prefix
+
+Submitted by: [40]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a string, $str and a character in the given string,
+   $char.
+
+   Write a script to reverse the prefix upto the first occurrence of the
+   given $char in the given string $str and return the new string.
+
+Example 1
+
+Input: $str = "programming", $char = "g"
+Output: "gorpramming"
+
+Reverse of prefix "prog" is "gorp".
+
+Example 2
+
+Input: $str = "hello", $char = "h"
+Output: "hello"
+
+Example 3
+
+Input: $str = "abcdefghij", $char = "h"
+Output: "hgfedcbaij"
+
+Example 4
+
+Input: $str = "reverse", $char = "s"
+Output: "srevere"
+
+Example 5
+
+Input: $str = "perl", $char = "r"
+Output: "repl"
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 5th October
+   2025.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"slices"
+	"strings"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func rp(s string, r rune) string {
+	i := strings.IndexRune(s, r)
+	if i < 1 {
+		return s
+	}
+	prfx := []rune(s[:i+1])
+	slices.Reverse(prfx)
+	return string(prfx) + s[i+1:]
+}
+
+func main() {
+	for _, data := range []struct {
+		str    string
+		char   rune
+		output string
+	}{
+		{"programming", 'g', "gorpramming"},
+		{"hello", 'h', "hello"},
+		{"abcdefghij", 'h', "hgfedcbaij"},
+		{"reverse", 's', "srevere"},
+		{"perl", 'r', "repl"},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(rp(data.str, data.char), data.output)) // blank if ok, otherwise show the difference
+	}
+}