10 examples of 'hash string to integer' in JavaScript

2
function hash(string) {
3
    string = string == null ? '' : string + '';
4
    let hash = 0;
5
    if (!string) return '' + hash;
6
    const length = string.length;
7
    for (let i = 0; i < length; i++) {
8
        hash = ((hash << 5) - hash) + string.charCodeAt(i);
9
        hash = hash & hash; // Convert to 32bit integer
10
    }
11
    return (hash).toString(16);
12
}

167
function hash(str) {
168
  var hashCode = 0;
169
  if (str.length === 0) { return hashCode; }
170
  for (var i = 0; i < str.length; i++) {
171
    var c = str.charCodeAt(i);
172
    hashCode = ((hashCode << 5) - hashCode) + c;
173
    hashCode = hashCode & hashCode; // Convert to 32-bit integer
174
  }
175
  return hashCode;
176
}

5
export function hash(string) {
6
  if (typeof string != "string") return 0;
7
  let hash = 0;
8
  if (string.length === 0) {
9
    return hash;
10
  }
11
  for (let i = 0; i < string.length; i++) {
12
    let char = string.charCodeAt(i);
13
    hash = ((hash<<5)-hash)+char;
14
    hash = hash & hash; // Convert to 32bit integer
15
  }
16
  return hash;
17
}

12
function hashString(string) {
13
  let hash = 0;
14
  for (let i = 0, len = string.length; i < len; i += 1) {
15
    hash = (31 * hash + string.charCodeAt(i)) | 0;
16
  }
17
  return hash;
18
}

4
export default function hash(str) {
5
  return murmurhash2(str, str.length).toString(36)
6
}

1
export default function hashString(str: string) {
2
  return hash(str, str.length).toString(36)
3
}

4
export function stringHash (str: string): number {
5
  let hash = 0;
6
7
  for(let i = 0; i < str.length; ++i) {
8
    hash = (((hash << 5) - hash) + str.charCodeAt(i)) | 0;
9
  }
10
11
  return hash;
12
}

213
function hash(str)
214
{
215
  var h = 5381;
216
  for (var i = 0; i>> 0;
217
//  h &= 0xffffffff;
218
  h = h >>> 0;
219
  h &= 0x0000ffff;
220
221
  return "0x"+("00000000" + h.toString(16)).substr(-8);
222
}

329
function stringHash(str) {
330
  var hash = 5381,
331
    i = str.length;
332
333
  while (i) hash = (hash * 33) ^ str.charCodeAt(--i);
334
  return (hash >>> 0).toString(36);
335
}

77
hashString: function hashString(string) {
78
    var hash = 0;
79
    for (var i = 0; i < string.length; i++) {
80
        hash = (hash << 5) - hash + string.charCodeAt(i) & 0xFFFFFFFF;
81
    }
82
    return hash;
83
},