scripts/training/filter-empty-lines.pl

#!/usr/bin/perl
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Matt Post <post@cs.jhu.edu>

# Takes a list of tab-separated strings on STDIN and prints the lines
# only if none of the fields is empty

use warnings;
use strict;

my $skipped = 0;
while (my $line = <>) {
  if ($line =~ /^\s*\t/ or $line =~ /\t *$/ or $line =~ /\t\s*\t/) {
    $skipped++;
  } else {
    print $line;
  }
}

print STDERR "Skipped $skipped / $.\n";