use open qw( :std :utf8 );
use experimental qw( lexical_subs );
-our $VERSION = '1.03';
+our $VERSION = '1.04';
use Getopt::Long '2.33', qw( :config gnu_getopt );
sub podexit {
$opt{anchor} //= qr/\A/;
$opt{'value-length'} = 6 if $opt{units};
+my (@lines, @values, @order);
+
if (defined $opt{interval}) {
$opt{interval} ||= 1;
$SIG{ALRM} = sub {
alarm $opt{interval};
};
alarm $opt{interval};
+
+ eval {
+ require Tie::Array::Sorted;
+ tie @order, 'Tie::Array::Sorted', sub { $_[1] <=> $_[0] };
+ } or warn $@, "Expect slowdown with large datasets!\n";
}
$SIG{INT} = 'IGNORE'; # continue after assumed eof
-my (@lines, @values);
my $valmatch = qr/$opt{anchor} ( \h* -? [0-9]* \.? [0-9]+ (?: e[+-]?[0-9]+ )? |)/x;
while (readline) {
s/\r?\n\z//;
s/^\h*// unless $opt{unmodified};
push @values, s/$valmatch/\n/ && $1;
- if (defined $opt{trim}) {
+ push @order, $1 if length $1;
+ if (defined $opt{trim} and defined $1) {
my $trimpos = abs $opt{trim};
if ($trimpos <= 1) {
$_ = substr $_, 0, 1;
$SIG{INT} = 'DEFAULT';
-my @order;
-
sub show_lines {
state $nr = $opt{hidemin} ? $opt{hidemin} - 1 : 0;
@lines or return;
@lines > $nr or return unless $opt{hidemin};
-@order = sort { $b <=> $a } grep { length } @values;
-my $maxval = $opt{hidemax} ? max @values[0 .. $opt{hidemax} - 1] : $order[0];
-my $minval = min $order[-1], 0;
+@order = sort { $b <=> $a } @order unless tied @order;
+my $maxval = ($opt{hidemax} ? max grep { length } @values[0 .. $opt{hidemax} - 1] : $order[0]) // 0;
+my $minval = min $order[-1] // (), 0;
my $lenval = $opt{'value-length'} // max map { length } @order;
my $len = defined $opt{trim} && $opt{trim} <= 0 ? -$opt{trim} + 1 :
max map { length $values[$_] && length $lines[$_] }
show_lines();
if ($opt{stat}) {
- my $total = sum @order;
- printf '%s total', $total;
- printf ' in %d values', scalar @values;
- printf ' (%s min, %*.*f avg, %s max)',
- $order[-1], 0, 2, $total / @order, $order[0];
+ if ($opt{hidemin} or $opt{hidemax}) {
+ $opt{hidemin} ||= 1;
+ $opt{hidemax} ||= @lines;
+ printf '%s of ', sum(@values[$opt{hidemin} - 1 .. $opt{hidemax} - 1]) // 0;
+ }
+ if (@order) {
+ my $total = sum @order;
+ printf '%s total', $total;
+ printf ' in %d values', scalar @values;
+ printf ' (%s min, %*.*f avg, %s max)',
+ $order[-1], 0, 2, $total / @order, $order[0];
+ }
say '';
}
=head1 EXAMPLES
-Commonly used after counting, such as users on the current server:
+Draw a sine wave:
- users | sed 's/ /\n/g' | sort | uniq -c | barcat
+ seq 30 | awk '{print sin($1/10)}' | barcat
-Letter frequencies in text files:
+Compare file sizes (with human-readable numbers):
- cat /usr/share/games/fortunes/*.u8 |
- perl -CO -nE 'say for grep length, split /\PL*/, uc' |
- sort | uniq -c | barcat
+ du -d0 -b * | barcat -H
-Memory usage of user processes:
+Memory usage of user processes with long names truncated:
ps xo %mem,pid,cmd | barcat -l40
-Sizes (in megabytes) of all root files and directories:
+Monitor network latency from prefixed results:
- du -d0 -m * | barcat
+ ping google.com | barcat -f'time=\K' -t
+
+Commonly used after counting, for example users on the current server:
+
+ users | sed 's/ /\n/g' | sort | uniq -c | barcat
+
+Letter frequencies in text files:
+
+ cat /usr/share/games/fortunes/*.u8 |
+ perl -CS -nE 'say for grep length, split /\PL*/, uc' |
+ sort | uniq -c | barcat
Number of HTTP requests per day:
cat log/access.log | cut -d\ -f4 | cut -d: -f1 | uniq -c | barcat
-Any kind of database query with leading counts:
+Any kind of database query with counts, preserving returned alignment:
echo 'SELECT count(*),schemaname FROM pg_tables GROUP BY 2' |
psql -t | barcat -u
-Exchange rate USD/EUR history from CSV download provided by ECB:
+External datasets, like movies per year:
+
+ curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json |
+ perl -054 -nlE 'say if s/^"year"://' | uniq -c | barcat
+
+But please get I<jq> to process JSON
+and replace the manual selection by C<< jq '.[].year' >>.
+
+Pokémon height comparison:
+
+ curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json |
+ jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | barcat
+
+USD/EUR exchange rate from CSV provided by the ECB:
curl https://sdw.ecb.europa.eu/export.do \
-Gd 'node=SEARCHRESULTS&q=EXR.D.USD.EUR.SP00.A&exportType=csv' |
grep '^[12]' | barcat -f',\K' --value-length=7
Total population history from the World Bank dataset (XML):
+External datasets, like total population in XML from the World Bank:
curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL |
xmllint --xpath '//*[local-name()="date" or local-name()="value"]' - |
sed -r 's,</wb:value>,\n,g; s,(<[^>]+>)+, ,g' | barcat -f1 -H
-Movies per year from prepared JSON data:
-
- curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json |
- jq '.[].year' | uniq -c | barcat
-
-Pokémon height comparison:
-
- curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json |
- jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | barcat
-
-Git statistics, such commit count by year:
+And of course various Git statistics, such commit count by year:
git log --pretty=%ci | cut -b-4 | uniq -c | barcat
git shortlog -sn | barcat -L3 -s
-Latency history:
-
- ping google.com | barcat -f'time=\K' -t
-
=head1 AUTHOR
Mischa POSLAWSKY <perl@shiar.org>
git.shiar.nl / barcat.git / blobdiff