I've a text file to which I want to add line break after every 64 chars. How can I add this using node-red?

Assuming the string is in msg.payload then the reg ex would be: msg.payload = msg.payload.replace(/(.{64})/g,'$1\n'); return msg;

does the file already contain line breaks or is it one big string? do spaces and other special characters count in the 64 characters? I'd probably use a function node and first get the lenth of the text (using javascript 'length' method) and then have a loop read the text using the javascript 'sub…

It is one very long string. Actually it is a base64 certificate in 1 line. I have to add the line break after every 64 characters to make the certificate a valid file.

There may be a way to use a regex expression to do it all in one go, but not being a regex expert (it hurts my head) I'd go with the function.

Awesome! Works like charm! Thanks @knolleary and @zenofmud

Replace also works using a change node and JSONata $replace(payload, /(.{64})/, '$1\n') But the magic comes from @knolleary :wink:

Good Morning, I tried to use your magic code to display a string in a text node on the dashboard and I expected to see a several lines of text, each 10 characters long, but it looks like this: [grafik] General question: How can I display "formatted text" (length / line break) on the dashboard. T…

<pre>{{msg.payload}}</pre> ? [image] [image]

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How to add Line Break after every 64 chars?

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zenofmud 9 July 2018 10:16 7

See I knew there would be a simple regex way of doing it (but it still hurts my brain )

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How to add Line Break after every 64 chars?

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