parser2.js

const sequence = parsers => input => {
  let next = input
  for (var i = 0; i < parsers.length; i++) {
    const parser = parsers[i]
    const {success, rest} = parser(next)
    if (!success) {
      return {success, rest}
    }
    next = rest
  }
  return {success: true, rest: next}
}
sequence([char('a'), char('b'), char('c')])('abc') 
// => { success: true, rest: '' }
sequence([char('a'), char('b'), char('a')])('abc')
// => { success: false, rest: 'c' }