pwc256 solution in go

2 files changed, 160 insertions, 0 deletions

diff --git a/challenge-256/pokgopun/go/ch-1.go b/challenge-256/pokgopun/go/ch-1.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-256/
+/*#
+
+Task 1: Maximum Pairs
+
+Submitted by: [41]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given an array of distinct words, @words.
+
+   Write a script to find the maximum pairs in the given array. The words
+   $words[i] and $words[j] can be a pair one is reverse of the other.
+
+Example 1
+
+Input: @words = ("ab", "de", "ed", "bc")
+Output: 1
+
+There is one pair in the given array: "de" and "ed"
+
+Example 2
+
+Input: @words = ("aa", "ba", "cd", "ed")
+Output: 0
+
+Example 3
+
+Input: @words = ("uv", "qp", "st", "vu", "mn", "pq"))
+Output: 2
+
+Task 2: Merge Strings
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"slices"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+type str string
+
+func (s str) reverse() str {
+	r := []rune(s)
+	slices.Reverse(r)
+	return str(r)
+}
+
+type strs []str
+
+func (st strs) maxPair() int {
+	l := len(st)
+	var c, i int
+	for i < l-1 {
+		for _, v := range st[i+1:] {
+			if st[i] == v.reverse() {
+				c++
+			}
+		}
+		i++
+	}
+	return c
+}
+
+func main() {
+	for _, data := range []struct {
+		input  strs
+		output int
+	}{
+		{strs{"ab", "de", "ed", "bc"}, 1},
+		{strs{"aa", "ba", "cd", "ed"}, 0},
+		{strs{"uv", "qp", "st", "vu", "mn", "pq"}, 2},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(data.input.maxPair(), data.output)) // blank if ok, otherwise show the difference
+	}
+}
diff --git a/challenge-256/pokgopun/go/ch-2.go b/challenge-256/pokgopun/go/ch-2.go
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index 0000000000..eb931d9d7e
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+++ b/challenge-256/pokgopun/go/ch-2.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-256/
+/*#
+
+Task 2: Merge Strings
+
+Submitted by: [42]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given two strings, $str1 and $str2.
+
+   Write a script to merge the given strings by adding in alternative
+   order starting with the first string. If a string is longer than the
+   other then append the remaining at the end.
+
+Example 1
+
+Input: $str1 = "abcd", $str2 = "1234"
+Output: "a1b2c3d4"
+
+Example 2
+
+Input: $str1 = "abc", $str2 = "12345"
+Output: "a1b2c345"
+
+Example 3
+
+Input: $str1 = "abcde", $str2 = "123"
+Output: "a1b2c3de"
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 18th February
+   2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"strings"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+type strPair struct {
+	str1, str2 string
+}
+
+func (sp strPair) merge() string {
+	l1 := len(sp.str1)
+	l2 := len(sp.str2)
+	l := max(l1, l2)
+	var b strings.Builder
+	for i := 0; i < l; i++ {
+		if i < l1 {
+			b.WriteByte(sp.str1[i])
+		}
+		if i < l2 {
+			b.WriteByte(sp.str2[i])
+		}
+	}
+	return b.String()
+}
+
+func main() {
+	for _, data := range []struct {
+		input  strPair
+		output string
+	}{
+		{strPair{"abcd", "1234"}, "a1b2c3d4"},
+		{strPair{"abc", "12345"}, "a1b2c345"},
+		{strPair{"abcde", "123"}, "a1b2c3de"},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(data.input.merge(), data.output)) // blank if ok, otherwise show the difference
+	}
+}