Security News
tea.xyz Spam Plagues npm and RubyGems Package Registries
Tea.xyz, a crypto project aimed at rewarding open source contributions, is once again facing backlash due to an influx of spam packages flooding public package registries.
sorted-set
Advanced tools
Readme
A sorted set based heavily upon redis' skip list implementation. The module named sorted-map separates keys and values similar to redis' implementation.
Run any of the following:
$ mocha
$ npm test
$ make test
Note: remember to npm install
!
$ npm install sorted-set
var Set = require('sorted-set');
var set = new Set();
// average O(log(N))
set.add('5a600e16');
set.add('5a600e17');
set.add('5a600e18'); // => null
set.add('5a600e17'); // => '5a600e17'
// average O(1)
set.has('5a600e17'); // => true
// average O(1)
set.get('5a600e17'); // => '5a600e17'
// average O(log(N))
set.del('5a600e16'); // => '5a600e16'
// average O(1)
set.del('5a600e16'); // => null
set.add('5a600e10');
set.add('5a600e11');
set.add('5a600e12');
set.add('5a600e13');
set.add('5a600e14');
set.add('5a600e15');
set.add('5a600e16');
// average O(log(N)+M) where M is the number of elements between min and max
set.range('5a600e13', '5a600e14'); // inclusive
// => ['5a600e13', '5a600e14']
set.range('5a600e15');
// => ['5a600e15', '5a600e16', '5a600e17', '5a600e18']
// average O(log(N)+log(M)) where M as in range
set.count('5a600e13', '5a600e14'); // => 2
// more or less indexOf for the sorted values
// average O(log(N))
set.rank('5a600e16'); // => 6
set.rank('5a600e13'); // => 3
set.rank('5a600e14'); // => 4
set.rank('5a600e15'); // => 5
set.rank('5a600e19'); // => -1
// average O(log(N)+M) where M as in range
set.slice(0, 3);
// => ['5a600e10', '5a600e11', '5a600e12']
set.slice(-1); // => ['5a600e18']
set.length; // => 9
set.shift(); // => '5a600e10'
set.pop(); // => '5a600e18'
set.head(); // => '5a600e11'
set.tail(); // => '5a600e17'
This form of intersection intersects based on the comparison of values.
var a = new Set(), b = new Set();
a.add('5a600e10');
a.add('5a600e12');
a.add('5a600e14');
a.add('5a600e15');
a.add('5a600e17');
a.add('5a600e18');
a.add('5a600e19');
a.add('5a600e1a');
a.add('5a600e1b');
a.add('5a600e1c');
a.add('5a600e1e');
b.add('5a600e10');
b.add('5a600e11');
b.add('5a600e13');
b.add('5a600e14');
b.add('5a600e15');
b.add('5a600e17');
b.add('5a600e19');
b.add('5a600e1b');
b.add('5a600e1c');
b.add('5a600e1d');
b.add('5a600e1f');
Set.intersect(a, b);
// => ['5a600e10', '5a600e14', '5a600e15', '5a600e17', '5a600e19', '5a600e1b', '5a600e1c']
Set.intersect(b, a);
// => ['5a600e10', '5a600e14', '5a600e15', '5a600e17', '5a600e19', '5a600e1b', '5a600e1c']
// works, but not preferred
a.intersect(b);
// => ['5a600e10', '5a600e14', '5a600e15', '5a600e17', '5a600e19', '5a600e1b', '5a600e1c']
var c = new Set();
c.add('5a600e10');
c.add('5a600e12');
c.add('5a600e13');
c.add('5a600e14');
c.add('5a600e16');
c.add('5a600e17');
c.add('5a600e18');
c.add('5a600e1a');
c.add('5a600e1c');
c.add('5a600e1f');
// for best performance, the smallest set should be first
Set.intersect(c, a, b);
// => ['5a600e10', '5a600e14', '5a600e17', '5a600e1c']
This form of intersect intersects based on the hash of the value. This version is also slower, because the set is not necessarily ordered by the hash of its values.
var a = new Set(), b = new Set();
a.add('5a600e10');
a.add('5a600e12');
a.add('5a600e13');
a.add('5a600e14');
a.add('5a600e16');
a.add('5a600e17');
a.add('5a600e18');
a.add('5a600e1a');
a.add('5a600e1c');
a.add('5a600e1f');
b.add('5a600e10');
b.add('5a600e11');
b.add('5a600e13');
b.add('5a600e14');
b.add('5a600e15');
b.add('5a600e17');
b.add('5a600e19');
b.add('5a600e1b');
b.add('5a600e1c');
b.add('5a600e1d');
b.add('5a600e1f');
Set.intersectKeys(a, b);
Caution: this often involves adding objects to the set. When you add an object to the set, make sure to not change the data in the object by reference without updating the set, unless the update doesn't alter the result of hashing or comparison.
var set = new Set({
// what the primary index should be (defaults to identity function)
hash: function(entry) {
return entry % 50;
},
// how to order the set (defaults to string-friendly comparator)
compare: function(a, b) {
// descending numeric sort
return b - a;
}
});
set.add(22);
set.add(72); // replaces 22 because it hashes to the same value
set.add(40);
// descending order
set.values(); // [72, 40]
You can enable unique values with the unique option, which causes set
to throw an error if the value provided already belongs to a different key.
var set = new Set({
unique: true,
hash: function(item) {
return item.key;
},
compare: function(a, b) {
return a.value - b.value;
}
});
set.add({key: '5a600e10', value: 16});
set.add({key: '5a600e11', value: 6});
set.add({key: '5a600e12', value: 17});
set.add({key: '5a600e13', value: 11});
set.add({key: '5a600e14', value: 14});
set.add({key: '5a600e15', value: 19});
set.add({key: '5a600e16', value: 3});
set.add({key: '5a600e17', value: 12});
set.add({key: '5a600e18', value: 10});
// currently O(log(N)) because it needs to attempt to insert the value
set.add({key: '5a600e19', value: 11}); // throws
set.add({key: '5a600e14', value: 14}); // => {key: '5a600e14', value: 14}
TODO: all tests need to check compare
and hash
support.
The MIT License (MIT)
Copyright © 2014 GlobeSherpa
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
a sorted set based heavily upon redis' skip list implementation
The npm package sorted-set receives a total of 235 weekly downloads. As such, sorted-set popularity was classified as not popular.
We found that sorted-set demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Tea.xyz, a crypto project aimed at rewarding open source contributions, is once again facing backlash due to an influx of spam packages flooding public package registries.
Security News
As cyber threats become more autonomous, AI-powered defenses are crucial for businesses to stay ahead of attackers who can exploit software vulnerabilities at scale.
Security News
UnitedHealth Group disclosed that the ransomware attack on Change Healthcare compromised protected health information for millions in the U.S., with estimated costs to the company expected to reach $1 billion.