module.exports.slice = function(arr) {
  return arr.slice(0, 2);
};
module.exports.imgCut = function(url, width, height) {
  if (url && (url.slice(0, 5) === 'http:' || url.slice(0, 6) === 'https:' || url.slice(0, 2) === '//')) {
    var argsStr = 'imageMogr2/thumbnail/!' + width +  'x' + height + 'r';
    if (url.indexOf('?') > -1) {
      url = url + '&' + argsStr;
    } else {
      url = url + '?' + argsStr;
    }
    if (url.slice(0, 5) === 'http:') {
      url = 'https://' + url.slice(5)
    }
    if (url.slice(0, 2) === '//') {
      url = 'https:' + url
    }
  }
  return url;
};