用来过滤文本中的单词

wf.sh

#!/bin/bash
# words filter 过滤文本中每一行的单词,忽略句子

do_filter() {
  while read -r line || [ -n "$line" ]; do
    words_count=$(echo $line | wc -w)
    if [[ $words_count -eq 1 ]]; then
      echo $line
      echo $line >> $output
    fi
  done < "$1"

  sort -u $output -o $output
  echo "All of the words in $input are already appended to $output"
}

launch() {
  input=$1
  output=$2

  if [[ -z $input ]]; then
    echo "wl [input] [output]"
    exit 0
  fi

  if [[ ! -e $input ]]; then
    echo "$input No such file or directory"
    exit 0
  fi

  if [[ -z $output ]]; then
    output="$(pwd)/words_filter_$( date '+%Y%m%d%H%M').txt"
  fi

  do_filter $input $output
}

launch $1 $2