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alexwebgr's solution

to Two Fer in the Perl 5 Track

Published at Mar 04 2021 · 0 comments
Test suite

Two-fer or 2-fer is short for two for one. One for you and one for me.

Given a name, return a string with the message:

One for X, one for me.

Where X is the given name.

However, if the name is missing, return the string:

One for you, one for me.

Here are some examples:

Name String to return
Alice One for Alice, one for me.
Bob One for Bob, one for me.
One for you, one for me.
Zaphod One for Zaphod, one for me.



Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.


#!/usr/bin/env perl
use Test2::V0;
use JSON::PP;

use FindBin qw($Bin);
use lib $Bin, "$Bin/local/lib/perl5";

use TwoFer qw(two_fer);

my $C_DATA = do { local $/; decode_json(<DATA>); };
plan 4;

imported_ok qw(two_fer) or bail_out;

for my $case ( @{ $C_DATA->{cases} } ) {
  is $case->{input}{name}
    ? two_fer( $case->{input}{name} )
    : two_fer(),
    $case->{expected}, $case->{description};

  "exercise": "two-fer",
  "version": "1.2.0",
  "cases": [
      "description": "no name given",
      "property": "twoFer",
      "input": {
        "name": null
      "expected": "One for you, one for me."
      "description": "a name given",
      "property": "twoFer",
      "input": {
        "name": "Alice"
      "expected": "One for Alice, one for me."
      "description": "another name given",
      "property": "twoFer",
      "input": {
        "name": "Bob"
      "expected": "One for Bob, one for me."
package TwoFer;
use strict;
use warnings;
use Exporter 'import';
our @EXPORT_OK = qw(two_fer);

use experimental qw(signatures);

sub two_fer ($name = 'you') {
    "One for $name, one for me.";



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