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Andrew
Asked: 2018-06-22 23:34:46 +0800 CST

How to concatenate variable with array element

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What I want to achieve is to automatically install NPM packages, so I created a separate variable which holds "sudo npm install" and iterating over an array which has the package name. Facing error that command not found but if I put it into the console it works.

npm_base='sudo npm install '
npm_scripts=("-g eslint")

for element in ${npm_scripts[@]}
do
    ${npm_base}${element}
done
bash npm

1 Answers

  1. You're very close.

    You need to add double quotes around the array, otherwise -g and eslint will be separated.

    npm_base='sudo npm install'
npm_scripts=("-g eslint")

for element in "${npm_scripts[@]}"
do
    ${npm_base} ${element}
done

    See https://www.cyberciti.biz/faq/bash-for-loop-array/

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