Bash Awk打印每个单词中的字母数

Question

Hey all so I am writing a bash script that will take a file with a single line such as:

Hello this is my test sentence.

And count how many letter there are in each word and produce output such as:

5 4 2 2 4 4

This is what I have written:

#!/bin/bash
awk 'BEGIN {k=1}
{
  for(i=1; i<=NF; i++){
    stuff[k]=length($i)
    printf("%d ", stuff[k])
    k++
  }
}
END {
  printf("%d ", stuff[k])
  printf("\n")
}'

and it gives me the output:

5 4 2 2 4 4

It is not recognizing how many letters there are in the last word of the sentence. Instead it is using the second to last number again. Where I am going wrong?

Answer 1

No need for awk:

echo Hello this is my test sentence. | { 
    read -a words
    for ((i=0 ; i<${#words[@]}; i++)) ; do
        words[i]=${#words[i]}
    done
    echo "${words[@]}"
}

Answer 2

Using bash only :

[ ~]$ str="Hello this is my test sentence"
[ ~]$ for word in $str; do echo -n "${#word} "; done; echo ""
5 4 2 2 4 8

Another solution with bash array :

[ ~]$ echo $str|(read -a words; for word in "${words[@]}"; do echo -n "${#word} "; done; echo "")
5 4 2 2 4 8

Answer 3

Assuming that by "word" you mean text separated by spaces, this will literally count how many letter there are in each word as requested:

$ cat file                                                      
Hello this is my test sentence.
and here is another sentence

$ awk '{for (i=1;i<=NF;i++) $i=gsub(/[[:alpha:]]/,"",$i)}1' file
5 4 2 2 4 8
3 4 2 7 8

and if you wanted to count all characters, not just letters, it'd be:

$ awk '{for (i=1;i<=NF;i++) $i=length($i)}1' file               
5 4 2 2 4 9
3 4 2 7 8

Answer 4

$ echo Hello this is my test sentence. | awk '{for (i=1;i<=NF;i++) {printf " " length($i)}; print "" }'
 5 4 2 2 4 9

Or, with the sentence in a file called sentence :

$ awk '{for (i=1;i<=NF;i++) {printf " " length($i)}; print "" }' sentence
 5 4 2 2 4 9

If we want to remove the leading space:

$ awk '{for (i=1;i<=NF;i++) {printf "%s%s",length($i),(i==NF?"\n":FS)} }' sentence
5 4 2 2 4 9