Nodejs String Hash toHashCodetoHashCode()

Method Source Code

String.prototype.toHashCode = function toHashCode() {
  let hash = 0;/*from  w  ww .  j a  va2  s .  co  m*/

  for (let i = 0; i < this.length; i++) {
    // (hash << 5) - hash == hash * 31
    hash = ((hash << 5) - hash) + this.charCodeAt(i);
    hash |= 0; // convert to 32 bit integer
  }

  return hash;
}

Related

1. parseHashtag()

   String.prototype.parseHashtag = function() {
     return this.replace(/[#]+[A-Za-z0-9-_]+/g, function(t) {
       var tag = t.replace("#","%23")
       return t.link("https://twitter.com/hashtag/"+tag+"?src=hash");
     });
   };
   

2. parseHashtag()

   String.prototype.parseHashtag = function() {
     return this.replace(/[#]+[A-Za-z0-9-_]+/, function(t) {
       var tag = t.replace("#","%23")
       return t.link("http://search.twitter.com/search?q="+tag);
     });
   };
   

3. parseHashtag()

   String.prototype.parseHashtag = function() {
       return this.replace(/[#]+^[ ,,]+/g, function(t) {
           var tag = t.replace("#","%23")
           return t.link("http://search.twitter.com/search?q="+tag);
       });
   };
   test = "Simon is writing a post about #??, #?? #and parsing hashtags as URLs";
   document.writeln(test.parseHashtag());
   

4. stripHashtag()

   String.prototype.stripHashtag = function() {
       return this.replace(/[#]+[A-Za-z0-9-_]+/g, "");
   };
   

5. toHash()

   String.prototype.toHash = function () {
     return this.split('').reduce((a, b) => {
       a = ((a << 5) - a) + b.charCodeAt(0)
       return a & a
     }, 0)