bash readarray 的替代方案，因为它在 mac os x 上不起作用
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alternative to readarray, because it does not work on mac os x
提问by user3652962
I have a varsValues.txt file
我有一个 varsValues.txt 文件
cat varsValues.txt
aa=13.7
something=20.6
countries=205
world=1
languages=2014
people=7.2
oceans=3.4
And I would like to create 2 arrays, vars and values. It should contain
我想创建 2 个数组、变量和值。它应该包含
echo ${vars[@]}
aa something countries world languages people oceans
echo ${values[@]}
13.7 20.6 205 1 2014 7.2 3.4
I use
我用
Npars=7
readarray -t vars < <(cut -d '=' -f1 varsValues.txt)
readarray -t values < <(cut -d '=' -f2 varsValues.txt)
for (( yy=0; yy<$Npars; yy++ )); do
eval ${vars[$yy]}=${values[$yy]}
done
echo $people
7.2
But I would like it without readarray which does not work on Mac (os x) and IFS (interfield separater).
但我希望它没有 readarray ，它不适用于 Mac（os x）和 IFS（场间分离器）。
Any other solution? awk? perl? which I can use in my bash script.
还有其他解决方案吗？啊？珀尔？我可以在我的 bash 脚本中使用它。
Thanks.
谢谢。
采纳答案by S. Ahn
Here's the awk version. Note that NParsis not hardcoded.
这是 awk 版本。请注意，这NPars不是硬编码的。
vars=($(awk -F= '{print }' varsValues.txt))
values=($(awk -F= '{print }' varsValues.txt))
Npars=${#vars[@]}
for ((i=0; i<$Npars; i++)); do
eval ${vars[$i]}=${values[$i]}
done
echo $people
回答by John B
You could use a read loop.
您可以使用读取循环。
while IFS=\= read var value; do
vars+=($var)
values+=($value)
done < VarsValues.txt
回答by Ed Morton
Let's start with this:
让我们从这个开始：
$ awk -F'=' '{values[]=} END{print values["people"]}' file
7.2
$ awk -F'=' '{values[]=} 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?
现在 - 你还需要做什么？
回答by Сухой27
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,
或者通过两次读取同一个文件，
perl -F'=' -lane 'print $F[0]' varsValues.txt
perl -F'=' -lane 'print $F[1]' varsValues.txt
回答by anubhava
You can use declarebulletin:
您可以使用declare公告：
declare -a vars=( $(cut -d '=' -f1 varsValues.txt) )
declare -a values=( $(cut -d '=' -f2 varsValues.txt) )
回答by Adrian
Figured I'd toss this in here: https://raw.githubusercontent.com/AdrianTP/new-environment-setup/master/utils/readarray.sh
想我会把它扔在这里：https: //raw.githubusercontent.com/AdrianTP/new-environment-setup/master/utils/readarray.sh
#!/bin/bash
# from: https://peniwize.wordpress.com/2011/04/09/how-to-read-all-lines-of-a-file-into-a-bash-array/
readarray() {
local __resultvar=
declare -a __local_array
let i=0
while IFS=$'\n' read -r line_data; do
__local_array[i]=${line_data}
((++i))
done <
if [[ "$__resultvar" ]]; then
eval $__resultvar="'${__local_array[@]}'"
else
echo "${__local_array[@]}"
fi
}
I keep this in a "utils" folder in my "new-environment-setup" Github repo, and I just clone it down and import it whenever I need to read a file into an array of lines an array get a new computer or wipe my drive. It should thus act as a backfill for readarray's shortcomings on Mac.
我将它保存在我的“新环境设置”Github 存储库中的“utils”文件夹中，我只是将其克隆并在需要将文件读入行数组时导入它，数组获取新计算机或擦除我的驱动器。因此，它应该作为 readarray 在 Mac 上的缺点的回填。
Import looks like:
导入看起来像：
# From: https://stackoverflow.com/a/12694189/771948
DIR="${BASH_SOURCE%/*}"
if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
. "$DIR/utils/readarray.sh"
Usage looks like readarray "<output_var_name>" "<input_file_name>".
用法看起来像readarray "<output_var_name>" "<input_file_name>"。
Yes it's a little rough. Sorry about that. It may not even work correctly anymore, but it did at one point, so I thought I would share it here to plant the idea of simply...writing your own backfill.
是的，它有点粗糙。对于那个很抱歉。它甚至可能不再正常工作，但有一次它确实如此，所以我想我会在这里分享它以植入简单的想法......编写自己的回填。
回答by Noel Yap
Try:
尝试：
IFS=$'\n' vars=($(cut -d '=' -f1 varsValues.txt))
IFS=$'\n' values=($(cut -d '=' -f2 varsValues.txt))
