hash table vs. conditionals

conditionals.js

// Get 1st, 2nd, 3rd, 4th, from 1, 2, 3, 4
// ignoring 11, 12, 13 for demo

// using conditionals
function suffixDate( date ) {
  var lastDigit = date % 10;
  if ( lastDigit == 1 ) {
    return date + 'st';
  } else if ( lastDigit == 2 ) {
    return date + 'nd';
  } else if ( lastDigit == 3 ) {
    return date + 'rd';
  }
  return date + 'th';
}

hash-table.js

// using hash table
var dateSuffices = {
  1: 'st',
  2: 'nd',
  3: 'rd'
};

function suffixDate( date ) {
  var lastDigit = date % 10;
  var suffix = dateSuffices[ lastDigit ] || 'th';
  return date + suffix;
}