Make from array string with length < 16

Question

I have this array ["Brad", "came", "to", "dinner", "with", "us"]

Brad came to dinner with us (27 chars > 16) so I need to split it into 2 strings:

Brad came to
dinner with us

Words cannot be sliced

let inpt=["Brad", "came", "to", "dinner", "with", "us"]
op=[]
for(i of inpt) if (op.join('').length+i.length <16) {op.push(i)} else break
console.log(op.join(' '))

This return me first part but how can I get second and others if my input array(string) would be longer then 16+16+16....

Hi, perhaps start appending to a new list once the limit is reached? — IronMan
– IronMan, Commented Nov 4, 2020 at 20:57
Very similar question: Split string at space after certain number of characters in Javascript — Heretic Monkey
– Heretic Monkey, Commented Nov 4, 2020 at 21:02
Does this answer your question? Splitting a string based on max character length, but keep words into account — Heretic Monkey
– Heretic Monkey, Commented Nov 4, 2020 at 21:02

CertainPerformance · Accepted Answer · 2020-11-04 20:58:42Z

3

After joining by spaces, use a regular expression to match up to 16 characters, followed by a space or the end of the string:

let inpt=["Brad", "came", "to", "dinner", "with", "us"];
const str = inpt.join(' ');
const matches = str.match(/.{1,16}(?: |$)/g);
console.log(matches);

answered Nov 4, 2020 at 20:58

CertainPerformance

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James · Accepted Answer · 2020-11-04 21:07:10Z

1

Can also be done via Array.reduce:

let inpt=["Brad", "came", "to", "dinner", "with", "us"];

let out = inpt.reduce((acc, el) => {
  let l = acc.length;
  if (l === 0 || (acc[l - 1] + el).length > 15) {
    acc[l] = el;
  } else {
    acc[l - 1] += " " + el;
  }
  return acc;
}, []);

console.log(out);

answered Nov 4, 2020 at 21:07

James

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