Function makeKeyRange

src/codemirror.js:9682–9688

(start, size)

      return /\S/.test(ch);
    }];
    function makeKeyRange(start, size) {
      var keys = [];
      for (var i = start; i < start + size; i++) {
        keys.push(String.fromCharCode(i));
      }
      return keys;
    }
    var upperCaseAlphabet = makeKeyRange(65, 26);
    var lowerCaseAlphabet = makeKeyRange(97, 26);
    var numbers = makeKeyRange(48, 10);