text: function extractLinks(arr) {
  
      let regex = /www\.[a-zA-Z0-9-]+(\.[a-z]{1,})+/gi;
  
      let links = [];
  
      for (let i = 0; i < arr.length; i++) {
  
          while (true) {
  
              let result = regex.exec(arr[i]);
  
              if (result == null) {
  
                  break;
              }
  
              links.push(result[0]);
          }
      }
  
      console.log(links.join("\n"));
  }
  
  extractLinks(["Join WebStars now for free, at www.web-stars.com", "You can also support our partners:", "Internet - www.internet.com", "WebSpiders - www.webspiders101.com", "Sentinel - www.sentinel.-ko", "Need information about cheap hotels in London ?", "You can check us at www.london-hotels.co.uk!", "We provide the best services in London.", "Here are some reviews in some blogs:", "London Hotels are awesome!  - www.indigo.bloggers.com", "I am very satisfied with their services - ww.ivan.bg", "Best Hotel Services! - www.rebel21.sedecrem.moc"]);