Chunk a sentence in to phrases with three words

Question

How to chunk a string in to 3-word(or less) phrases with brackets at ends?

Following is a sample string

This is a sample sentence containing some words with some other meanings.

Following is the expected result

[This is a sample] [sentence containing some] [words with some] [other meanings.]

I've added mine

this is what i've tried

    this.mod = this.data.replace(/([.?!])\s*(?=[A-Z])/g, "$1|").split("|");
    this.mod.map((sentence) => {
      sentence.split(' ').reduce((acc, cur, idx, arr) => {
        acc + cur
      } ,'')
    })

This is also what I've tried & it is not working.

    const res = this.mod.map((sentence) => {
      return sentence.split(" ").reduce((acc, cur, idx, arr) => {
        acc + (idx % 3 === 0) ? `][${cur}]` : cur;
      }, "[");
    });

Is there any other approach?

Maybe this [post](https://stackoverflow.com/questions/18914629/split-string-into-sentences-in-javascript) can help you. — era-net, Jun 18 '20 at 06:39
Is there a way in vanilla javascript to split a sentence in to meaningful phrases. — reacg garav, Jun 18 '20 at 06:42
You would need to understand what a meaningful phrase is, which requires some sort of machine learning algorithm. I don't think Javascript is the best choice in this case. — Dane Brouwer, Jun 18 '20 at 06:44
if this is not possible chunk a sentence in to phrases with three words ?? — reacg garav, Jun 18 '20 at 06:44
Very possible if it's only chunked into 3 words regardless of meaning. — Dane Brouwer, Jun 18 '20 at 06:44
this is possible. maybe you try yourself and edit this question with you approach. — Nina Scholz, Jun 18 '20 at 06:49
https://stackoverflow.com/questions/8495687/split-array-into-chunks, https://stackoverflow.com/questions/40682103/splitting-an-array-up-into-chunks-of-a-given-size, and [.split](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split) — user120242, Jun 18 '20 at 06:53
Using regex: `'This is a sample sentence containing some words with some other meanings.'.replace(/(\w+ \w+(?: \w+)?)/g,'[$1]')` — user120242, Jun 18 '20 at 07:35
In all honesty, I was waiting for the question to reopen so I could post my answer. https://jsfiddle.net/abpmyzfL/ — Dane Brouwer, Jun 18 '20 at 08:45

score 1 · Answer 1 · answered Jun 19 '20 at 03:49

Ok here is a simple stab at it:

function chunkIt(str) {
  const words = str.split(' ') // split into individual words
  const result = []
  let phrase = []
  for (const word of words) {
    if (phrase.length < 3) {
      phrase.push(word)
    }

    if (phrase.length === 3) {
      result.push(phrase.join(' '))
      phrase = [] 
    }
  }  
  if (phrase.length > 0) {
    result.push(phrase.join(' '))
  }
  return result
}

Chunk a sentence in to phrases with three words

1 Answers1