Convert nodejs exec output to array

Question

How can I convert the shell command output to an array so I can print variables as uniqueMetrics[0], uniqueMetrics[1] etc?

const uniqueMetrics = await execShellCommand('aws cloudwatch list-metrics --namespace AWS/ApiGateway  | jq -r .Metrics[].Dimensions[].Name | sort -u')

console.log(uniqueMetrics);

output:

ApiId
ApiName
Stage

It seems the data is returned as follows with \r and \n.

[ 'ApiId\r\nApiName\r\nStage\r\n' ]

So I'm guessing I'd need to search and replace these strings first. Am I thinking right?

Kurt Thiemann · Accepted Answer · 2021-11-22 10:48:10Z

1

You should be able to use String.split() function:

let uniqueMetricsArray = uniqueMetrics.split('\r\n');

For better compatibility, it might make sense to make it work for both \r\n and just \n using RegExp:

let uniqueMetricsArray = uniqueMetrics.split(/\r?\n/);

answered Nov 22, 2021 at 10:48

Kurt Thiemann

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2 Comments

user630702 Over a year ago

It returns an empty array value as well. Any idea how to fix that as well? [ 'ApiId', 'ApiName', 'Stage', '' ]

marzelin Over a year ago

@John filter the result or trim the input string.

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