alternative to readarray, because it does not work on mac os x

Question

I have a varsValues.txt file

cat varsValues.txt
aa=13.7
something=20.6
countries=205
world=1
languages=2014
people=7.2
oceans=3.4

And I wou

Answer 1

Here's the awk version. Note that NPars is not hardcoded.

vars=($(awk -F= '{print $1}' varsValues.txt))
values=($(awk -F= '{print $2}' varsValues.txt))

Npars=${#vars[@]}

for ((i=0; i<$Npars; i++)); do
    eval ${vars[$i]}=${values[$i]}
done

echo $people

Answer 2

You can use declare bulletin:

declare -a vars=( $(cut -d '=' -f1 varsValues.txt) )
declare -a values=( $(cut -d '=' -f2 varsValues.txt) )

Answer 3

Figured I'd toss this in here: https://raw.githubusercontent.com/AdrianTP/new-environment-setup/master/utils/readarray.sh

#!/bin/bash
# from: https://peniwize.wordpress.com/2011/04/09/how-to-read-all-lines-of-a-file-into-a-bash-array/
readarray() {
  local __resultvar=$1
  declare -a __local_array
  let i=0
  while IFS=$'\n' read -r line_data; do
      __local_array[i]=${line_data}
      ((++i))
  done < $2
  if [[ "$__resultvar" ]]; then
    eval $__resultvar="'${__local_array[@]}'"
  else
    echo "${__local_array[@]}"
  fi
}

I keep this in a "utils" folder in my "new-environment-setup" Github repo, and I just clone it down and import it whenever I need to read a file into an array of lines an array get a new computer or wipe my drive. It should thus act as a backfill for readarray's shortcomings on Mac.

Import looks like:

# From: https://stackoverflow.com/a/12694189/771948
DIR="${BASH_SOURCE%/*}"
if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
. "$DIR/utils/readarray.sh"

Usage looks like readarray "<output_var_name>" "<input_file_name>".

Yes it's a little rough. Sorry about that. It may not even work correctly anymore, but it did at one point, so I thought I would share it here to plant the idea of simply...writing your own backfill.

Answer 4

perl -0777 -nE '@F= split /[=\r\n]/; say "@F[grep !($_%2), 0..$#F]"; say "@F[grep $_%2, 0..$#F]"' varsValues.txt

or by reading same file twice,

perl -F'=' -lane 'print $F[0]' varsValues.txt
perl -F'=' -lane 'print $F[1]' varsValues.txt

Answer 5

You could use a read loop.

while IFS=\= read var value; do
    vars+=($var)
    values+=($value)
done < VarsValues.txt

Answer 6

Let's start with this:

$ awk -F'=' '{values[$1]=$2} END{print values["people"]}' file
7.2

$ awk -F'=' '{values[$1]=$2} END{for (name in values) print name, values[name]}' file
languages 2014
oceans 3.4
world 1
something 20.6
countries 205
people 7.2
aa 13.7

Now - what else do you need to do?