pwc261 solution in go

2 files changed, 193 insertions, 0 deletions

diff --git a/challenge-261/pokgopun/go/ch-1.go b/challenge-261/pokgopun/go/ch-1.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-261/
+/*#
+
+Task 1: Element Digit Sum
+
+Submitted by: [45]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given an array of integers, @ints.
+
+   Write a script to evaluate the absolute difference between element and
+   digit sum of the given array.
+
+Example 1
+
+Input: @ints = (1,2,3,45)
+Output: 36
+
+Element Sum: 1 + 2 + 3 + 45 = 51
+Digit Sum: 1 + 2 + 3 + 4 + 5 = 15
+Absolute Difference: | 51 - 15 | = 36
+
+Example 2
+
+Input: @ints = (1,12,3)
+Output: 9
+
+Element Sum: 1 + 12 + 3 = 16
+Digit Sum: 1 + 1 + 2 + 3 = 7
+Absolute Difference: | 16 - 7 | = 9
+
+Example 3
+
+Input: @ints = (1,2,3,4)
+Output: 0
+
+Element Sum: 1 + 2 + 3 + 4 = 10
+Digit Sum: 1 + 2 + 3 + 4 = 10
+Absolute Difference: | 10 - 10 | = 0
+
+Example 4
+
+Input: @ints = (236, 416, 336, 350)
+Output: 1296
+
+Task 2: Multiply by Two
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func sumDigit(n int) int {
+	if n < 11 {
+		return n
+	}
+	s := 0
+	for n > 0 {
+		s += n % 10
+		n /= 10
+	}
+	return s
+}
+
+type ints []int
+
+func (is ints) sum() int {
+	s := 0
+	for _, v := range is {
+		s += v
+	}
+	return s
+}
+
+func (is ints) sumDigit() int {
+	s := 0
+	for _, v := range is {
+		s += sumDigit(v)
+	}
+	return s
+}
+
+func (is ints) eds() int {
+	return is.sum() - is.sumDigit()
+}
+
+func main() {
+	for _, data := range []struct {
+		input  ints
+		output int
+	}{
+		{ints{1, 2, 3, 45}, 36},
+		{ints{1, 12, 3}, 9},
+		{ints{1, 2, 3, 4}, 0},
+		{ints{236, 416, 336, 350}, 1296},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(data.input.eds(), data.output)) // blank if ok, otherwise show the difference
+	}
+}
diff --git a/challenge-261/pokgopun/go/ch-2.go b/challenge-261/pokgopun/go/ch-2.go
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+//# https://theweeklychallenge.org/blog/perl-weekly-challenge-261/
+/*#
+
+Task 2: Multiply by Two
+
+Submitted by: [46]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given an array of integers, @ints and an integer $start..
+
+   Write a script to do the followings:
+a) Look for $start in the array @ints, if found multiply the number by 2
+b) If not found stop the process otherwise repeat
+
+   In the end return the final value.
+
+Example 1
+
+Input: @ints = (5,3,6,1,12) and $start = 3
+Output: 24
+
+Step 1: 3 is in the array so 3 x 2 = 6
+Step 2: 6 is in the array so 6 x 2 = 12
+Step 3: 12 is in the array so 12 x 2 = 24
+
+24 is not found in the array so return 24.
+
+Example 2
+
+Input: @ints = (1,2,4,3) and $start = 1
+Output: 8
+
+Step 1: 1 is in the array so 1 x 2 = 2
+Step 2: 2 is in the array so 2 x 2 = 4
+Step 3: 4 is in the array so 4 x 2 = 8
+
+8 is not found in the array so return 8.
+
+Example 3
+
+Input: @ints = (5,6,7) and $start = 2
+Output: 2
+
+2 is not found in the array so return 2.
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 24th March
+   2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+#*/
+//# solution by pokgopun@gmail.com
+
+package main
+
+import (
+	"io"
+	"os"
+	"slices"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+type ints []int
+
+func (is ints) mb2(start int) int {
+	slices.Sort(is)
+	for _, v := range is {
+		if v == start {
+			start *= 2
+		}
+	}
+	return start
+}
+
+func main() {
+	for _, data := range []struct {
+		ints       ints
+		start, end int
+	}{
+		{ints{5, 3, 6, 1, 12}, 3, 24},
+		{ints{1, 2, 4, 3}, 1, 8},
+		{ints{5, 6, 7}, 2, 2},
+	} {
+		io.WriteString(os.Stdout, cmp.Diff(data.ints.mb2(data.start), data.end)) // blank if ok, otherwise show the difference
+	}
+}