Package Exports
- hash-set
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (hash-set) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
hash-set
The original Set uses Same-value-zero equality.
Use this package if you need custom comparison behavior.
Install
$ npm install --save hash-setUsage
import hashSet from 'hash-set';
// Create Set class which compares objects with JSON.stringify
const JSONSet = hashSet(JSON.stringify);
// Create instance of JSONSet
const mySet = new JSONSet();
mySet.add({ a: 1 });
mySet.add({ b: 2 });
mySet.has({ a: 1 }); // true
mySet.has({ b: 2 }); // true
mySet.has({ c: 3 }); // false, `{ c: 3 }` has not been added to the set
mySet.size; // 2
mySet.delete({ a: 1 }); // removes `{ a: 1 }` from the set
mySet.has({ a: 1 }); // false, `{ a: 1 }` has been removed
mySet.size; // 1API
hashSet(hashFn)
Returns Set class with custom equality comparisons.
hashFn
Type: function
The function to determine the unique of value.
HashSet executes a provided function every time you call add(value), has(value), delete(value).
The result of hashFn(value) will be used for comparison with the values of HashSet. For comparison will be used Same-value-zero.
Example
const mySet = new Set();
mySet.add(1); // value has been added to the set
mySet.add('1'); // value has been added to the set
// because `Object.is(1, '1')` is `false`
console.log(mySet); // Set { 1, '1' }import hashSet from 'hash-set';
function hashFn(value) {
return value.toString();
}
const StringSet = hashSet(hashFn);
const mySet = new StringSet();
mySet.add(1); // value has been added to the set
mySet.add('1'); // value has not been added to the set
// because `Object.is(hashFn(1), hashFn('1'))` is `true`
console.log(mySet); // Set { 1 }License
MIT © Andrew Abramov