Function isUpperCase

static/js/codemirror/keymap/vim.js:295–297

(k)

      return numberRegex.test(k);
    }
    function isUpperCase(k) {
      return (/^[A-Z]$/).test(k);
    }
    function isAlphanumeric(k) {
      return (/^[\w]$/).test(k);
    }