Function isLine

lib/web/CodeMirror/keymap/vim.js:423–425

(cm, line)

    var validRegisters = [].concat(upperCaseAlphabet, lowerCaseAlphabet, numbers, ['-', '"', '.', ':', '_', '/']);

    function isLine(cm, line) {
      return line >= cm.firstLine() && line <= cm.lastLine();
    }
    function isLowerCase(k) {
      return (/^[a-z]$/).test(k);
    }