pwc331 solution in go

2 files changed, 163 insertions, 0 deletions

diff --git a/challenge-331/pokgopun/go/ch-1.go b/challenge-331/pokgopun/go/ch-1.go
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+++ b/challenge-331/pokgopun/go/ch-1.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-331/
+/*#
+
+Task 1: Last Word
+
+Submitted by: [43]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a string.
+
+   Write a script to find the length of last word in the given string.
+
+Example 1
+
+Input: $str = "The Weekly Challenge"
+Output: 9
+
+Example 2
+
+Input: $str = "   Hello   World    "
+Output: 5
+
+Example 3
+
+Input: $str = "Let's begin the fun"
+Output: 3
+
+Task 2: Buddy Strings
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"regexp"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func lw(str string) int {
+	idx := regexp.MustCompile(`(\S+)\s*$`).FindStringSubmatchIndex(str)
+	return idx[3] - idx[2]
+}
+
+func main() {
+	for _, data := range []struct {
+		input  string
+		output int
+	}{
+		{"The Weekly Challenge", 9},
+		{"   Hello   World    ", 5},
+		{"Let's begin the fun", 3},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(lw(data.input), data.output)) // blank if ok, otherwise show the difference
+	}
+}
diff --git a/challenge-331/pokgopun/go/ch-2.go b/challenge-331/pokgopun/go/ch-2.go
new file mode 100644
index 0000000000..c1a735e3bd
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+++ b/challenge-331/pokgopun/go/ch-2.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-331/
+/*#
+
+Task 2: Buddy Strings
+
+Submitted by: [44]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given two strings, source and target.
+
+   Write a script to find out if the given strings are Buddy Strings.
+If swapping of a letter in one string make them same as the other then they are
+`Buddy Strings`.
+
+Example 1
+
+Input: $source = "fuck"
+       $target = "fcuk"
+Output: true
+
+The swapping of 'u' with 'c' makes it buddy strings.
+
+Example 2
+
+Input: $source = "love"
+       $target = "love"
+Output: false
+
+Example 3
+
+Input: $source = "fodo"
+       $target = "food"
+Output: true
+
+Example 4
+
+Input: $source = "feed"
+       $target = "feed"
+Output: true
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 27th July 2025.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"slices"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+type input struct {
+	source, target string
+}
+
+func (in input) process() bool {
+	l := len(in.source)
+	if l != len(in.target) {
+		return false
+	}
+	s := []byte(in.source)
+	slices.Sort(s)
+	s = slices.Compact(s)
+	if in.source == in.target {
+		if l != len(s) {
+			return true
+		} else {
+			return false
+		}
+	}
+	var swp []byte
+	for i := range l {
+		a, b := in.source[i], in.target[i]
+		if a != b {
+			swp = append(swp, a, b)
+		}
+		if len(swp) == 4 {
+			if swp[0] == swp[3] && swp[1] == swp[2] {
+				return in.source[i+1:] == in.target[i+1:]
+			}
+		}
+	}
+	return false
+}
+
+func main() {
+	for _, data := range []struct {
+		input  input
+		output bool
+	}{
+		{input{"fuck", "fcuk"}, true},
+		{input{"love", "love"}, false},
+		{input{"fodo", "food"}, true},
+		{input{"feed", "feed"}, true},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(data.input.process(), data.output)) // blank if ok, otherwise show the difference
+	}
+}