From 8e5ab06d01ae253baa5be620c3dcb0996985587c Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Wed, 4 Sep 2019 15:16:23 +0200
Subject: [PATCH] write out script, enable warnings

Mostly the same code but more readable and maintainable.
Integers are captured and bars enlarged to fill screen width.
---
 graph | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/graph b/graph
index fbc1248..d20fcd3 100755
--- a/graph
+++ b/graph
@@ -1,6 +1,18 @@
-#!/usr/bin/perl -l
-use List::Util 'max';
-chomp for my @r = <>;
-my $len = 1 + max map length, @r;
-my $size = (80 - $len) / max @r;
-print $_, ' 'x($len-length), '#'x($_*$size) for @r;
+#!/usr/bin/env perl
+use 5.014;
+use warnings;
+use List::Util qw( max );
+
+my $width = $ENV{COLUMNS} || 80;
+
+my @lines = readline;
+chomp for @lines;
+my @values = map { /^\h*([0-9]*)/ } @lines;
+my $maxval = max @values;
+my $len    = 1 + max map { length } @lines;  # left padding
+my $size   = ($width - $len) / $maxval;  # bar multiplication
+
+for (@lines) {
+	my $val = shift @values;
+	say $_, ' ' x ($len - length), '#' x ($val * $size);
+}
-- 
2.30.0