Converts a Unicode range to the actual characters.

unicode_range_to_characters.js

/**
 * Convert a Unicode range to the actual characters.
 * The Unicode range is in this form - ['U+0020', 'U+0041-005A']
 * @param {array} range - An array containing strings of Unicode range.
 * @returns {array} - An array containing the actual characters.
 */
function charactersFromUnicodeRange(ranges) {
  var output = [];

  ranges.forEach(function(range) {
    range = range.replace(/^U+/, '');

    var parts = range.split('-');

    if (parts.length === 1)
      return output.push(String.fromCharCode(parseInt(parts[0], 16)));

    var start = parseInt(parts[0], 16);
    var end = parseInt(parts[1], 16);

    for (var i = start; i <= end; i++) {
      output.push(String.fromCharCode(i));
    }
  });

  return output;
}