Formatting an array being printed in the shell using bash

Question

so I have a bash script that is supposed to print peoples names and their scores from a text file

The text input file is as follows

Ted 86 
Anthony 70
Mark 95
Kyle 65
David 75

This is my code

#! /bin/bash
inputfile="$1"

 if [[ !(-f "$1") ]]; then
    echo "$1 must be a file"
    exit 1
 else
    echo "$1 is a file"
 fi
                                                                                                                    
 names=()                                                                                                                
 scores=()                                                                                                                                                                                                                                       
 while read line                                                                                                         
 do                                                                                                                              
   lineArray=($line)                                                                                                       
   names+=(${lineArray[0]})
   scores+=(${lineArray[1]})                                                                                       
 done < $inputfile
                                                                                                                    
 echo "${names[@]} ${scores[@]}"

This is the output

score is a file
Ted Anthony Mark Kyle David 86 70 95 65 75

My issue is, I need the output to be displayed in the same way as it appears in the input text file and I don't know how to use a loop to do it. Thank you

Isn't it obvious that you should use a loop?

Barmar
– Barmar

2020-10-19 21:31:43 +00:00
Commented Oct 19, 2020 at 21:31 — Barmar
– Barmar, Commented Oct 19, 2020 at 21:31

Ted Lyngmo · Accepted Answer · 2020-10-19 21:20:20Z

1

You could make a for loop to loop over the entries in the two arrays.

#!/bin/bash

inputfile="$1"

if [[ ! -f $inputfile ]]; then
    echo "$inputfile must be a file"
    exit 1
else
    echo "$inputfile is a file"
fi

names=()
scores=()

while IFS= read -r name score
do
    names+=( "$name" )
    scores+=( "$score" )
done < $inputfile

# like this:

for ((i=0; i<${#names[@]}; ++i))
do
    echo "${names[$i]} ${scores[$i]}"
done

edited Oct 19, 2020 at 21:20

answered Oct 19, 2020 at 21:13

Ted Lyngmo

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1 Comment

Charles Duffy Over a year ago

Consider quoting, as in names+=( "$name" ). If someone names themselves *, we don't want to add a list of filenames in the current directory to the array.

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