Javascript Split String by word count

Question

I'm trying to split the string by word count, the below example is split by character count.

eg. I have 25 words of content.

var text = `Lorem ipsum dolor sit amet, consectetuer adipiscing elit. 
    Aenean commodo ligula eget dolor. 
    Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur.`


var part1 =  text.substr(0, text.substr(0, text.length > 100 ? 100 : text.length ).lastIndexOf(" "));

var part2 =  text.substr(text.substr(0, text.length > 100 ? 100 : text.length ).lastIndexOf(" "));

console.log(part1);
console.log(part2);

the output will be like this : part 1

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. 
Aenean commodo ligula eget dolor

part 2

Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur.

How to achieve the same output by word count, like 10 words in part 1 and remaining in part 2

note: The format of the content should print as it is.

stackoverflow.com/questions/3548527/…

epascarello
– epascarello

2020-04-24 16:10:50 +00:00
Commented Apr 24, 2020 at 16:10 — epascarello
– epascarello, Commented Apr 24, 2020 at 16:10

Rob Brander · Accepted Answer · 2020-04-24 16:14:38Z

1

Here is a way you can do it. I first split all the words by space (assuming that is how you want to split words). Once I have an array of words, I then iterate over all them and check the index to see if it belongs in part1 or part2. Finally, I return both parts in an array so that both can be extracted upon calling.

const splitWords = (text, numWords) => {
  const words = text.split(' ')
  let part1 = '', part2 = ''
  words.forEach((word, idx) => {
    if (idx < numWords) {
       part1 += ' ' + word
    } else {
        part2 += ' ' + word 
    }
  })
  return [part1.trim(), part2.trim()]
}

const [ part1, part2 ] = splitWords(text, 25)

answered Apr 24, 2020 at 16:14

Rob Brander

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1 Comment

user13399800 Over a year ago

Thanks, but the format of the content should be as it is, while print part1 and part2.

Juha Kangas · Accepted Answer · 2020-04-24 16:40:47Z

1

Here is another solution. Words splitted by spaces and spliced in the middle. Array is then joined back together with spaces.

    var text = `Lorem ipsum dolor sit amet, consectetuer adipiscing elit. 
Aenean commodo ligula eget dolor. 
Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur.`

    
    let part2=text.split(' ').filter(Boolean);
    let part1=part2.splice(0,(part2.length/2)+1).join(" ")
    part2=part2.join(" ")
    
    console.log(part1);
    console.log(part2);

answered Apr 24, 2020 at 16:40

Juha Kangas

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