@qit/format
format based on certain keys: A, 9, and *
var format = require('@qit/format');
format('**** **** **** ****', '4111111111111111') === '4111 1111 1111 1111'
format('**** **** **** ****', '************1111') === '**** **** **** 1111'
format('**** **** **** ****', '************1111') === '**** **** **** 1111'
// handles incomplete values
format('9999 9999 9999 9999', '************1111') === '1111'
format('**** **** **** ****', '41111111') === '4111 1111'
format('**** **** **** ****', '411111111') === '4111 1111 1'
// ignore other characters
format('(999) 999-9999', '12345 67789') === '(123) 456-7789'
format('(999) 999-9999', '12A345 677B89') === '(123) 456-7789'
// appends leftover text
format('A AAAA AAA', 'ILOVEFOOD!') === 'I LOVE FOOD!'