regexp-tokenize

RegExp.prototype.exec sugar to preserve callback/promise chains

Instead of:

var tokens = /(.+)=(.+)/.exec('key1=value1');

if (tokens) {
  console.log('key:', tokens[1], 'value:', tokens[2]);
} else {
  console.error('No match');
}

You can do:

(a) Callback

Get captured tokens as named arguments instead of dealing with obscure indices:

tokenize(/(.+)=(.+)/, 'key1=value1', function (match, key, value) {
  console.log('key:', key, 'value:', value);
});

(b) Promise

Get captured tokens with a resolved promise:

tokenize(/(.+)=(.+)/, 'key1=value1')
  .then(function (tokens) {
    console.log('key:', tokens[1], 'value:', tokens[2]);
  })
  .catch(function () {
    console.error('No match');
  });

(c) Promise with token mapping

tokenize(/(.+)=(.+)/, 'key1=value1', { key: 1, value: 2 })
  .then(function (pair) {
    console.log('key:', pair.key, 'value:', pair.value);
  })
  .catch(function () {
    console.error('No match');
  });

Usage

npm install --save regexp-tokenize

var tokenize = require('regexp-tokenize');

tokenize(/.../, '...')