Hello Everyone, I working with a node which outputs an array of 8 strings and I wish to convert these to numbers and name each of the elements in the array. The elements of the array always arrive in the same order. I use the buffer/parser node in my modbus projects to achieve this goal but I don't …

So yes the CSV node can do that for you if you feed it appropriately

First thing to do is a google search (try javascript convert array of strings to numbers) and see if what you find will solve your problem!

I would look to maybe use a join node in manual mode to join the array elements into a CSV string - and then into a csv node with a template set to the names you want and set to parse numeric values.

Or a quick little function node: let stringArray = msg.payload; let numberArray = stringArray.map(Number); msg.payload = numberArray; return msg;

That doesn't achieve the naming of the elements....

Missed that in reading the thread (need that coffee to kick in) @GRHMLGGT when you say you want to 'name each of the elements in the array' do you mean you want each element of the array to be an object (i.e. [{"item1",15.9337},{"item2",-772.0405}....] or something else? Can you show whatt he out…

I think you meant ...em1":15... -- def need that coffee ! the CSV node would give you {"item1":15.9337,"item2":-772.04505 ... etc } ie just an object with named properties... not an array... so yes depends what @GRHMLGGT really requires.

Thanks, I already know that I can use a simple bit of JSONata to so this, but to do it and name all the elements is what I am not sure about.

Here is what I want, this comes from using the buffer/parser node on a modbus project I done sometime ago. Which is each element becomes an object. [Screenshot 2022-11-16 115439]

Function node would be like this: let stringArray = msg.payload; let numberArray = stringArray.map(Number); let resultobj = { "thing0": numberArray[0], "thing1": numberArray[1], "thing2": numberArray[2] } msg.payload = resultobj; return msg; You will have to add the other names in the …

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Array of strings to numbers and naming them

General

E1cid 16 November 2022 12:17 11

The JSONata expression would be like below except the names array would have 8 elements

(
    $names := ["one","two"];
    $$.payload#$i.${$names[$i]: $number($)}
)

1 Like

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Array of strings to numbers and naming them

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