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immutable

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immutable - npm Package Compare versions

Comparing version 4.0.0-rc.1 to 4.0.0-rc.2

42

dist/immutable.min.js

@@ -9,22 +9,22 @@ /**

*/
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2

package.json
{
"name": "immutable",
"version": "4.0.0-rc.1",
"version": "4.0.0-rc.2",
"description": "Immutable Data Collections",

@@ -5,0 +5,0 @@ "homepage": "https://facebook.github.com/immutable-js",

266

README.md

@@ -19,3 +19,3 @@ Immutable collections for JavaScript

`Immutable` also provides a lazy `Seq`, allowing efficient
Immutable.js also provides a lazy `Seq`, allowing efficient
chaining of collection methods like `map` and `filter` without creating

@@ -45,8 +45,8 @@ intermediate representations. Create some `Seq` with `Range` and `Repeat`.

```javascript
var Immutable = require('immutable');
var map1 = Immutable.Map({a:1, b:2, c:3});
var map2 = map1.set('b', 50);
map1.get('b'); // 2
map2.get('b'); // 50
```js
const { Map } = require('immutable')
const map1 = Map({ a: 1, b: 2, c: 3 })
const map2 = map1.set('b', 50)
map1.get('b') // 2
map2.get('b') // 50
```

@@ -56,3 +56,3 @@

To use `immutable` from a browser, download [dist/immutable.min.js](https://github.com/facebook/immutable-js/blob/master/dist/immutable.min.js)
To use Immutable.js from a browser, download [dist/immutable.min.js](https://github.com/facebook/immutable-js/blob/master/dist/immutable.min.js)
or use a CDN such as [CDNJS](https://cdnjs.com/libraries/immutable)

@@ -75,3 +75,3 @@ or [jsDelivr](http://www.jsdelivr.com/#!immutable.js).

```javascript
```js
require(['./immutable.min.js'], function (Immutable) {

@@ -85,15 +85,37 @@ var map1 = Immutable.Map({a:1, b:2, c:3});

If you're using [browserify](http://browserify.org/), the `immutable` npm module
also works from the browser.
If you're using [webpack](https://webpack.github.io/) or
[browserify](http://browserify.org/), the `immutable` npm module also works
from the browser.
### TypeScript
### Flow & TypeScript
Use these Immutable collections and sequences as you would use native
collections in your [TypeScript](http://typescriptlang.org) programs while still taking
collections in your [Flowtype](https://flowtype.org/) or [TypeScript](http://typescriptlang.org) programs while still taking
advantage of type generics, error detection, and auto-complete in your IDE.
Just add a reference with a relative path to the type declarations at the top
of your file.
Installing `immutable` via npm brings with it type definitions for Flow (v0.39.0 or higher)
and TypeScript (v2.1.0 or higher), so you shouldn't need to do anything at all!
```javascript
#### Using TypeScript with Immutable.js v4
Immutable.js type definitions embrace ES2015. While Immutable.js itself supports
legacy browsers and environments, its type definitions require TypeScript's 2015
lib. Include either `"target": "es2015"` or `"lib": "es2015"` in your
`tsconfig.json`, or provide `--target es2015` or `--lib es2015` to the
`tsc` command.
```js
import { Map } from "immutable";
const map1 = Map({ a: 1, b: 2, c: 3 });
const map2 = map1.set('b', 50);
map1.get('b'); // 2
map2.get('b'); // 50
```
#### Using TypeScript with Immutable.js v3 and earlier:
Previous versions of Immutable.js include a reference file which you can include
via relative path to the type definitions at the top of your file.
```js
///<reference path='./node_modules/immutable/dist/immutable.d.ts'/>

@@ -137,11 +159,12 @@ import Immutable = require('immutable');

```javascript
var map1 = Immutable.Map({a:1, b:2, c:3});
var map2 = map1.set('b', 2);
assert(map1.equals(map2) === true);
var map3 = map1.set('b', 50);
assert(map1.equals(map3) === false);
```js
const { Map } = require('immutable')
const map1 = Map( {a: 1, b: 2, c: 3 })
const map2 = map1.set('b', 2)
assert(map1.equals(map2) === true)
const map3 = map1.set('b', 50)
assert(map1.equals(map3) === false)
```
Note: As a performance optimization `Immutable` attempts to return the existing
Note: As a performance optimization Immutable.js attempts to return the existing
collection when an operation would result in an identical collection, allowing

@@ -159,5 +182,6 @@ for using `===` reference equality to determine if something definitely has not

```javascript
var map1 = Immutable.Map({a:1, b:2, c:3});
var clone = map1;
```js
const { Map } = require('immutable')
const map1 = Map({ a: 1, b: 2, c: 3 })
const clone = map1;
```

@@ -172,8 +196,8 @@

While `immutable` is inspired by Clojure, Scala, Haskell and other functional
While Immutable.js is inspired by Clojure, Scala, Haskell and other functional
programming environments, it's designed to bring these powerful concepts to
JavaScript, and therefore has an Object-Oriented API that closely mirrors that
of [ES6][] [Array][], [Map][], and [Set][].
of [ES2015][] [Array][], [Map][], and [Set][].
[ES6]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript/ECMAScript_6_support_in_Mozilla
[ES2015]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript/ECMAScript_6_support_in_Mozilla
[Array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array

@@ -188,7 +212,8 @@ [Map]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map

```javascript
var list1 = Immutable.List.of(1, 2);
var list2 = list1.push(3, 4, 5);
var list3 = list2.unshift(0);
var list4 = list1.concat(list2, list3);
```js
const { List } = require('immutable')
const list1 = List([ 1, 2 ]);
const list2 = list1.push(3, 4, 5);
const list3 = list2.unshift(0);
const list4 = list1.concat(list2, list3);
assert(list1.size === 2);

@@ -206,4 +231,5 @@ assert(list2.size === 5);

```javascript
var alpha = Immutable.Map({a:1, b:2, c:3, d:4});
```js
const { Map } = require('immutable')
const alpha = Map({ a: 1, b: 2, c: 3, d: 4 });
alpha.map((v, k) => k.toUpperCase()).join();

@@ -215,16 +241,17 @@ // 'A,B,C,D'

Designed to inter-operate with your existing JavaScript, `immutable`
Designed to inter-operate with your existing JavaScript, Immutable.js
accepts plain JavaScript Arrays and Objects anywhere a method expects an
`Iterable` with no performance penalty.
`Collection`.
```javascript
var map1 = Immutable.Map({a:1, b:2, c:3, d:4});
var map2 = Immutable.Map({c:10, a:20, t:30});
var obj = {d:100, o:200, g:300};
var map3 = map1.merge(map2, obj);
```js
const { Map } = require('immutable')
const map1 = Map({ a: 1, b: 2, c: 3, d: 4 })
const map2 = Map({ c: 10, a: 20, t: 30 })
const obj = { d: 100, o: 200, g: 300 }
const map3 = map1.merge(map2, obj);
// Map { a: 20, b: 2, c: 10, d: 100, t: 30, o: 200, g: 300 }
```
This is possible because `immutable` can treat any JavaScript Array or Object
as an Iterable. You can take advantage of this in order to get sophisticated
This is possible because Immutable.js can treat any JavaScript Array or Object
as a Collection. You can take advantage of this in order to get sophisticated
collection methods on JavaScript Objects, which otherwise have a very sparse

@@ -234,5 +261,6 @@ native API. Because Seq evaluates lazily and does not cache intermediate

```javascript
var myObject = {a:1,b:2,c:3};
Immutable.Seq(myObject).map(x => x * x).toObject();
```js
const { Seq } = require('immutable')
const myObject = { a: 1, b: 2, c: 3 }
Seq(myObject).map(x => x * x).toObject();
// { a: 1, b: 4, c: 9 }

@@ -246,10 +274,12 @@ ```

```js
var obj = { 1: "one" };
Object.keys(obj); // [ "1" ]
obj["1"]; // "one"
obj[1]; // "one"
const { fromJS } = require('immutable')
var map = Immutable.fromJS(obj);
map.get("1"); // "one"
map.get(1); // undefined
const obj = { 1: "one" }
Object.keys(obj) // [ "1" ]
obj["1"] // "one"
obj[1] // "one"
const map = fromJS(obj)
map.get("1") // "one"
map.get(1) // undefined
```

@@ -264,9 +294,10 @@

All `immutable` Iterables can be converted to plain JavaScript Arrays and
All Immutable.js Collections can be converted to plain JavaScript Arrays and
Objects shallowly with `toArray()` and `toObject()` or deeply with `toJS()`.
All Immutable Iterables also implement `toJSON()` allowing them to be passed to
`JSON.stringify` directly.
All Immutable Collections also implement `toJSON()` allowing them to be passed
to `JSON.stringify` directly.
```javascript
var deep = Immutable.Map({ a: 1, b: 2, c: Immutable.List.of(3, 4, 5) });
```js
const { Map, List } = require('immutable')
const deep = Map({ a: 1, b: 2, c: List([ 3, 4, 5 ]) })
deep.toObject() // { a: 1, b: 2, c: List [ 3, 4, 5 ] }

@@ -278,18 +309,18 @@ deep.toArray() // [ 1, 2, List [ 3, 4, 5 ] ]

### Embraces ES6
### Embraces ES2015
`Immutable` takes advantage of features added to JavaScript in [ES6][],
the latest standard version of ECMAScript (JavaScript), including [Iterators][],
[Arrow Functions][], [Classes][], and [Modules][]. It's also inspired by the
[Map][] and [Set][] collections added to ES6. The library is "transpiled" to ES3
in order to support all modern browsers.
Immutable.js supports all JavaScript environments, including legacy
browsers (even IE8). However it also takes advantage of features added to
JavaScript in [ES2015][], the latest standard version of JavaScript, including
[Iterators][], [Arrow Functions][], [Classes][], and [Modules][]. It's inspired
by the native [Map][] and [Set][] collections added to ES2015.
All examples are presented in ES6. To run in all browsers, they need to be
translated to ES3.
All examples in the Documentation are presented in ES2015. To run in all
browsers, they need to be translated to ES3.
```js
// ES6
foo.map(x => x * x);
// ES2015
const mapped = foo.map(x => x * x);
// ES3
foo.map(function (x) { return x * x; });
var mapped = foo.map(function (x) { return x * x; });
```

@@ -306,7 +337,8 @@

The collections in `immutable` are intended to be nested, allowing for deep
The collections in Immutable.js are intended to be nested, allowing for deep
trees of data, similar to JSON.
```javascript
var nested = Immutable.fromJS({a:{b:{c:[3,4,5]}}});
```js
const { fromJS } = require('immutable')
const nested = fromJS({ a: { b: { c: [ 3, 4, 5 ] } } })
// Map { a: Map { b: Map { c: List [ 3, 4, 5 ] } } }

@@ -319,12 +351,12 @@ ```

```javascript
var nested2 = nested.mergeDeep({a:{b:{d:6}}});
```js
const nested2 = nested.mergeDeep({ a: { b: { d: 6 } } })
// Map { a: Map { b: Map { c: List [ 3, 4, 5 ], d: 6 } } }
nested2.getIn(['a', 'b', 'd']); // 6
nested2.getIn([ 'a', 'b', 'd' ]) // 6
var nested3 = nested2.updateIn(['a', 'b', 'd'], value => value + 1);
const nested3 = nested2.updateIn([ 'a', 'b', 'd' ], value => value + 1)
// Map { a: Map { b: Map { c: List [ 3, 4, 5 ], d: 7 } } }
var nested4 = nested3.updateIn(['a', 'b', 'c'], list => list.push(6));
const nested4 = nested3.updateIn([ 'a', 'b', 'c' ], list => list.push(6))
// Map { a: Map { b: Map { c: List [ 3, 4, 5, 6 ], d: 7 } } }

@@ -338,3 +370,3 @@ ```

`Seq` describes a lazy operation, allowing them to efficiently chain
use of all the Iterable methods (such as `map` and `filter`).
use of all the sequence methods (such as `map` and `filter`).

@@ -351,4 +383,8 @@ **Seq is immutable** — Once a Seq is created, it cannot be

var oddSquares = Immutable.Seq.of(1,2,3,4,5,6,7,8)
.filter(x => x % 2).map(x => x * x);
```js
const { Seq } = require('immutable')
const oddSquares = Seq([ 1, 2, 3, 4, 5, 6, 7, 8 ])
.filter(x => x % 2)
.map(x => x * x)
```

@@ -359,7 +395,12 @@ Once the Seq is used, it performs only the work necessary. In this

console.log(oddSquares.get(1)); // 9
```js
console.log(oddSquares.get(1)); // 9
```
Any collection can be converted to a lazy Seq with `.toSeq()`.
var seq = Immutable.Map({a:1, b:1, c:1}).toSeq();
```js
const { Map } = require('immutable')
const seq = Map({ a: 1, b: 2, c: 3 }).toSeq()
```

@@ -369,16 +410,21 @@ Seq allows for the efficient chaining of sequence operations, especially when

seq.flip().map(key => key.toUpperCase()).flip().toObject();
// { A: 1, B: 1, C: 1 }
```js
seq.flip().map(key => key.toUpperCase()).flip().toObject();
// { A: 1, B: 1, C: 1 }
```
As well as expressing logic that would otherwise seem memory-limited:
Immutable.Range(1, Infinity)
.skip(1000)
.map(n => -n)
.filter(n => n % 2 === 0)
.take(2)
.reduce((r, n) => r * n, 1);
// 1006008
```js
const { Range } = require('immutable')
Range(1, Infinity)
.skip(1000)
.map(n => -n)
.filter(n => n % 2 === 0)
.take(2)
.reduce((r, n) => r * n, 1);
// 1006008
```
Note: An iterable is always iterated in the same order, however that order may
Note: A Collection is always iterated in the same order, however that order may
not always be well defined, as is the case for the `Map`.

@@ -390,11 +436,12 @@

`Immutable` provides equality which treats immutable data structures as pure
Immutable.js provides equality which treats immutable data structures as pure
data, performing a deep equality check if necessary.
```javascript
var map1 = Immutable.Map({a:1, b:1, c:1});
var map2 = Immutable.Map({a:1, b:1, c:1});
assert(map1 !== map2); // two different instances
assert(Immutable.is(map1, map2)); // have equivalent values
assert(map1.equals(map2)); // alternatively use the equals method
```js
const { Map, is } = require('immutable')
const map1 = Map({ a: 1, b: 2, c: 3 })
const map2 = Map({ a: 1, b: 2, c: 3 })
assert(map1 !== map2) // two different instances
assert(is(map1, map2)) // have equivalent values
assert(map1.equals(map2)) // alternatively use the equals method
```

@@ -421,6 +468,6 @@

which can add up to a minor performance penalty. If you need to apply a series
of mutations locally before returning, `Immutable` gives you the ability to
of mutations locally before returning, Immutable.js gives you the ability to
create a temporary mutable (transient) copy of a collection and apply a batch of
mutations in a performant manner by using `withMutations`. In fact, this is
exactly how `Immutable` applies complex mutations itself.
exactly how Immutable.js applies complex mutations itself.

@@ -430,5 +477,6 @@ As an example, building `list2` results in the creation of 1, not 3, new

```javascript
var list1 = Immutable.List.of(1,2,3);
var list2 = list1.withMutations(function (list) {
```js
const { List } = require('immutable')
const list1 = List([ 1, 2, 3 ]);
const list2 = list1.withMutations(function (list) {
list.push(4).push(5).push(6);

@@ -440,3 +488,3 @@ });

Note: `immutable` also provides `asMutable` and `asImmutable`, but only
Note: Immutable.js also provides `asMutable` and `asImmutable`, but only
encourages their use when `withMutations` will not suffice. Use caution to not

@@ -467,3 +515,3 @@ return a mutable copy, which could result in undesired behavior.

If you are using the [Chai Assertion Library](http://chaijs.com/), [Chai Immutable](https://github.com/astorije/chai-immutable) provides a set of assertions to use against `Immutable` collections.
If you are using the [Chai Assertion Library](http://chaijs.com/), [Chai Immutable](https://github.com/astorije/chai-immutable) provides a set of assertions to use against Immutable.js collections.

@@ -498,2 +546,2 @@

`Immutable` is [BSD-licensed](https://github.com/facebook/immutable-js/blob/master/LICENSE). We also provide an additional [patent grant](https://github.com/facebook/immutable-js/blob/master/PATENTS).
Immutable.js is [BSD-licensed](https://github.com/facebook/immutable-js/blob/master/LICENSE). We also provide an additional [patent grant](https://github.com/facebook/immutable-js/blob/master/PATENTS).
dist/immutable-nonambient.d.ts

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dist/immutable.d.ts

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dist/immutable.js

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dist/immutable.js.flow

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