使用javascript regex在大文本中查找首字母缩略词

const findAcronyms = (str) => {
  const words = str.split(/\s+/)
  
  return words.reduce((all, word, i) => {
    const isCandidate = word.match(/\([A-Z]+\)/)
    if (!isCandidate) {return all}
    const letters = word.split('').slice(1, -1)
    const acro = letters.join('')   
    if (i - letters.length < 0) {return all}
    if (words.slice(i - letters.length, i)
        .map(s => s[0]).join('')
        .toLowerCase() !== acro.toLowerCase()) {
      return all
    }
    
    return {
      ...all, 
      [acro]: words.slice(i - letters.length, i).join(' ')
    }
  }, {})
}

const str = 'bla bla radar cross section (RCS) but this one (IN) is not And This One (ATO) is'

console.log(findAcronyms(str)) //~>
// {
//   RCS: "radar cross section",
//   ATO: "And This One"
// }

const str = "bla bla radar cross section (RCS) bla bla...(aaaaaa) stack overflow (SO)",
  acronymes = [],
  result = str.match(/\(([A-Z].*?)\)/g).map(val => {
    acronymes.push(val.substr(1, val.length - 2));
  });

console.log(acronymes)