Challenge 019 task 2

1 files changed, 27 insertions, 0 deletions

diff --git a/challenge-019/jo-37/perl/ch-2.pl b/challenge-019/jo-37/perl/ch-2.pl
new file mode 100755
index 0000000000..c3689c0472
--- /dev/null
+++ b/challenge-019/jo-37/perl/ch-2.pl
@@ -0,0 +1,27 @@
+#!/usr/bin/perl -s
+
+use v5.16;
+use warnings;
+use List::Util 'reduce';
+
+our $textwidth //= 72;
+
+die <<EOS unless @ARGV;
+usage: $0 [-textwidth=L] PARAGRAPH
+
+-textwidth=L
+    specify maximum line length
+
+PARAGRAPH
+    text taken as a single paragraph
+
+EOS
+
+
+say reduce {
+        # match the last line.
+        $a =~/(.*)$/;
+        # Append the next word separated by a newline if the textwidth
+        # would be exceeded or a space otherwise.
+        $a . (length($b) + length($1) + 1 > $textwidth ? "\n" : " ") . $b;
+    } split /\s+/, shift;