commit 0a89058f5b9dc715ed2a47c26b141dba451bb653
parent 0ca298743e1fe7c1adae915e4a284531699f3f2f
Author: Samir Parikh <noreply@samirparikh.com>
Date: Fri, 1 Jul 2022 19:34:08 +0000
initial commit for grains
Diffstat:
4 files changed, 235 insertions(+), 0 deletions(-)
diff --git a/grains/Grains.pm b/grains/Grains.pm
@@ -0,0 +1,19 @@
+package Grains;
+
+use strict;
+use warnings;
+use feature qw<say>;
+
+use Exporter qw<import>;
+our @EXPORT_OK = qw<grains_on_square total_grains>;
+
+sub grains_on_square {
+ my ($square) = @_;
+ return undef;
+}
+
+sub total_grains {
+ return undef;
+}
+
+1;
diff --git a/grains/HELP.md b/grains/HELP.md
@@ -0,0 +1,35 @@
+# Help
+
+## Running the tests
+
+There is a Perl 5 script with the extension `.t`, which will be used to test
+your solution. You can run through the tests by using the command:
+
+```bash
+`prove .`
+```
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit Grains.pm` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Perl 5 track's documentation](https://exercism.org/docs/tracks/perl5)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [/r/perl5](https://www.reddit.com/r/perl5) is the perl5 subreddit.
+- [StackOverflow](http://stackoverflow.com/questions/tagged/perl5) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.
+\ No newline at end of file
diff --git a/grains/README.md b/grains/README.md
@@ -0,0 +1,54 @@
+# Grains
+
+Welcome to Grains on Exercism's Perl 5 Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Calculate the number of grains of wheat on a chessboard given that the number
+on each square doubles.
+
+There once was a wise servant who saved the life of a prince. The king
+promised to pay whatever the servant could dream up. Knowing that the
+king loved chess, the servant told the king he would like to have grains
+of wheat. One grain on the first square of a chess board, with the number
+of grains doubling on each successive square.
+
+There are 64 squares on a chessboard (where square 1 has one grain, square 2 has two grains, and so on).
+
+Write code that shows:
+
+- how many grains were on a given square, and
+- the total number of grains on the chessboard
+
+## For bonus points
+
+Did you get the tests passing and the code clean? If you want to, these
+are some additional things you could try:
+
+- Optimize for speed.
+- Optimize for readability.
+
+Then please share your thoughts in a comment on the submission. Did this
+experiment make the code better? Worse? Did you learn anything from it?
+
+## Source
+
+### Created by
+
+- @bistik
+
+### Contributed to by
+
+- @darksuji
+- @dnmfarrell
+- @kappa
+- @kentfredric
+- @kytrinyx
+- @m-dango
+- @rfilipo
+- @sshine
+
+### Based on
+
+JavaRanch Cattle Drive, exercise 6 - http://www.javaranch.com/grains.jsp
+\ No newline at end of file
diff --git a/grains/grains.t b/grains/grains.t
@@ -0,0 +1,125 @@
+#!/usr/bin/env perl
+use Test2::V0;
+use JSON::PP;
+use constant JSON => JSON::PP->new;
+
+use FindBin qw<$Bin>;
+use lib $Bin, "$Bin/local/lib/perl5";
+
+use Grains qw<grains_on_square total_grains>;
+
+my @test_cases = do { local $/; @{ JSON->decode(<DATA>) }; };
+plan 12;
+
+imported_ok qw<grains_on_square total_grains> or bail_out;
+
+for my $case (@test_cases) {
+ if ( ref $case->{expected} ) {
+ like dies( sub { grains_on_square( $case->{input}{square} ) } ),
+ qr/$case->{expected}{error}/,
+ $case->{description};
+ }
+ elsif ( $case->{property} eq 'square' ) {
+ is( grains_on_square( $case->{input}{square} ),
+ $case->{expected}, 'square no. ' . $case->{description} );
+ }
+ elsif ( $case->{property} eq 'total' ) {
+ is( total_grains(), $case->{expected}, $case->{description} );
+ }
+}
+
+__DATA__
+[
+ {
+ "description": "returns the number of grains on the square: grains on square 1",
+ "expected": 1,
+ "input": {
+ "square": 1
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: grains on square 2",
+ "expected": 2,
+ "input": {
+ "square": 2
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: grains on square 3",
+ "expected": 4,
+ "input": {
+ "square": 3
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: grains on square 4",
+ "expected": 8,
+ "input": {
+ "square": 4
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: grains on square 16",
+ "expected": 32768,
+ "input": {
+ "square": 16
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: grains on square 32",
+ "expected": 2147483648,
+ "input": {
+ "square": 32
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: grains on square 64",
+ "expected": 9223372036854775808,
+ "input": {
+ "square": 64
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: square 0 raises an exception",
+ "expected": {
+ "error": "square must be between 1 and 64"
+ },
+ "input": {
+ "square": 0
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: negative square raises an exception",
+ "expected": {
+ "error": "square must be between 1 and 64"
+ },
+ "input": {
+ "square": -1
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the number of grains on the square: square greater than 64 raises an exception",
+ "expected": {
+ "error": "square must be between 1 and 64"
+ },
+ "input": {
+ "square": 65
+ },
+ "property": "square"
+ },
+ {
+ "description": "returns the total number of grains on the board",
+ "expected": 18446744073709551615,
+ "input": {},
+ "property": "total"
+ }
+]
