American Soundex

american-soundex.js

function americanSoundex(names) {
  const nArr = names.split(' ');
  let o = '';
  for (let n = 0, max = nArr.length; n < max; n++) {
    let name = nArr[n];
    const first = name[0];
    let output = first + name.slice(1).replace(/(h|w)/ig, '');
    let regX = [/(b|f|p|v)/ig, /(c|g|j|k|q|s|x|z)/ig, /(d|t)/ig, /l/ig, /(m|n)/ig, /r/ig];
    for (let i = 0, max = regX.length; i < max; i++) {
      output = output.replace(regX[i], i + 1);
    }
    output = output.replace(/(\d)\1+/g, '$1');
    output = output[0] + output.slice(1).replace(/(a|e|i|o|u|y)/ig, '');
    if (/^\d.*/.test(output)) { output = first + output.slice(1); }
    if (!output.match(/\d/g)) {
      output = output[0].toUpperCase() + '000';
    } else {
      let matches = output.match(/\d/g);
      if (matches.length < 3) { output += '000'; }
      matches = output.match(/\d/g);
      output = output[0].toUpperCase();
      for (let i = 0; i < 3; i++) {
        output += matches[i][0];
      }
    }
    o += output + ' ';
  }
  return o.trim();
}

// TEST
americanSoundex("Sarah Connor"); // "S600 C560"

AmericanSoundex.markdown

American Soundex

Soundex description

American Soundex description

Rules

1. Save the first letter. Remove all occurrences of h and w except first letter.

2. Replace all consonants (include the first letter) with digits as follows:

   2.1. b, f, p, v = 1

   2.2. c, g, j, k, q, s, x, z = 2

   2.3. d, t = 3

   2.4. l = 4

   2.5. m, n = 5

   2.6. r = 6

3. Replace all adjacent same digits with one digit.

4. Remove all occurrences of a, e, i, o, u, y except first letter.

5. If first symbol is a digit replace it with letter saved on step 1.

6. Append 3 zeros if result contains less than 3 digits. Remove all except first letter and 3 digits after it

A script by V.

License.