Function isInteger

lib/infer.js:546–550

(str)

  });

  function isInteger(str) {
    var c0 = str.charCodeAt(0);
    if (c0 >= 48 && c0 <= 57) return !/\D/.test(str);
    else return false;
  }

  var Obj = exports.Obj = function(proto, name) {
    if (!this.props) this.props = Object.create(null);