Immutable

API

filter(target, predicate)

filter([1, 2, 3, 4], (n) => n % 2 === 0);

// => [2, 4]

map(target, callback)

map([1, 2, 3], (n) => n * 2);

// => [2, 4, 6]

mapEntries(target, callback)

TODO: Document this function

merge(target, value)

merge({ a: 1, b: 2 }, { a: 42 });

// => { a: 42, b: 2 }

push(target, value)

push([1, 2], 3);

// => [1, 2, 3]

set(target, key, value)

set({ value: 42 }, 'value', 84);

// => { value: 84 }

setIn(target, ...keys, value)

setIn({ nested: { value: 42 } }, 'nested', 'value', 84);

// => { nested: { value: 84 } }

splice()

TODO: Document this function

updateIn(target, ...keys, updater)

updateIn({ nested: { value: 42 } }, 'nested', 'value', (value) => value * 2);

// => { nested: { value: 84 } }

union(target, value)

union([1, 2, 3], [2, 4]);

// => [1, 2, 3, 4]