extra-set

A set is a collection of unique values.
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Methods look like:

• concat(): doesn't modify the map itself (pure).
• concat$(): modifies the map itself (update).

Methods as separate packages:

• @extra-set/concat: use rollup to bundle this es module.
• @extra-set/concat.min: use in browser (browserify, uglify-js).

Stability: Experimental.

const set = require("extra-set");
// import * as set from "extra-set";
// import * as set from "https://unpkg.com/extra-set@2.1.60/index.mjs"; (deno)

var x = new Set([1, 2, 3, 4, 5]);
var y = new Set([2, 4]);
set.difference(x, y);
// Set(3) { 1, 3, 5 }

var x = new Set([1, 2, 3]);
var y = new Set([3, 4]);
set.isDisjoint(x, y);
// false

var x = new Set([1, 2, 3, 4]);
var y = new Set([3, 4, 5, 6]);
set.symmetricDifference(x, y);
// Set(4) { 1, 2, 5, 6 }

var x = new Set([1, 2, 3]);
[...set.subsets(x)];
// [
//   Set(0) {},
//   Set(1) { 1 },
//   Set(1) { 2 },
//   Set(2) { 1, 2 },
//   Set(1) { 3 },
//   Set(2) { 1, 3 },
//   Set(2) { 2, 3 },
//   Set(3) { 1, 2, 3 }
// ]

Index

Method	Action
is	Checks if value is set.
add	Adds value to set.
remove	Deletes a value.
size	Gets size of set.
head	Gets first value.
take	Keeps first n values only.
shift	Removes first value.
from	Creates a set from values.
concat	Appends values from sets.
flat	Flattens nested set to given depth.
chunk	Breaks set into chunks of given size.
filterAt	Gets set with given values.
map	Updates values based on map function.
filter	Keeps values which pass a test.
reduce	Reduces values to a single value.
range	Finds smallest and largest entries.
count	Counts values which satisfy a test.
partition	Segregates values by test result.
cartesianProduct	Lists cartesian product of sets.
some	Checks if any value satisfies a test.
union	Gives values present in any set.
intersection	Gives values present in both sets.
difference	Gives values of set not present in others.
symmetricDifference	Gives values not present in both sets.
isDisjoint	Checks if sets have no common values.
value	Picks an arbitrary value.
entry	Picks an arbitrary entry.
subset	Picks an arbitrary subset.
isEmpty	Checks if set is empty.
isEqual	Checks if two sets are equal.
compare	Compares two sets.
find	Finds a value passing s test.
scanWhile	Finds first value not passing a test.