foop
Version:
interfaces that describe their intentions.
508 lines (466 loc) • 40.3 kB
JavaScript
/* eslint dot-notation: "OFF" */
var ENV_DEVELOPMENT = require('./deps/env/dev')
var SymbolIterator = require('./deps/symbols/iterator')
var SymbolInstance = require('./deps/symbols/instance')
var SymbolPrimitive = require('./deps/symbols/primitive')
var isPrototypeOf = require('./deps/is/prototypeOf')
var isMap = require('./deps/is/map')
var isSet = require('./deps/is/set')
var isNull = require('./deps/is/null')
var isUndefined = require('./deps/is/undefined')
var isString = require('./deps/is/string')
var isFunction = require('./deps/is/function')
var isFalse = require('./deps/is/false')
var ownPropertyIs = require('./deps/is/ownPropertyIs')
var noop = require('./deps/util/noop')
var ObjectKeys = require('./deps/util/keys')
var ObjectDefine = require('./deps/util/define')
var ignored = require('./deps/meta/ignored')
var ArrayFrom = require('./deps/util/from')
var keyValueToIterator = require('./deps/cast/keyValueToIterator')
var hasOwnPropertyFlipped = require('./deps/flipped/hasOwnPropertyFlipped')
var when = require('./deps/fp/when')
var composer = require('./compose/composer')
var pathSatisfies = require('./deps/fp/propSatisfies')
var hasStore = hasOwnPropertyFlipped('store')
var hasConstructMethod = pathSatisfies('construct', isFunction)
var hasDestructorMethod = pathSatisfies('destructor', isFunction)
// @TODO change from `||` to if else
var shouldClear = function (key, property) { return !ignored(key) &&
(isMap(property) || isSet(property) || hasStore(property)); }
// @TODO would just be `always(prop(name))`
function valueMethod(name) {
return function() {
return this[name]
}
}
// const SymbolFor = x => x // Symbol.for
// const ChainSymbol = SymbolFor('⛓')
// const ChainExtendedSymbol = SymbolFor('🍬')
// @TODO add back option to send args to parent
var ComposeChainable = function (Target, parentArgs) {
/* istanbul ignore next: dev */
if (ENV_DEVELOPMENT) {
if (!Target || !Target.prototype) {
console.log({Target: Target})
// throw new TypeError('did not have a super class / target base')
}
}
/**
* @desc Trait class that can inherit any class passed into compose, extended by ChainedMap & ChainedSet
*
* @member Chainable
* @class Chainable
* @category Chainable
* @type {Chainable}
*
* @prop {Chainable | any} parent
* @prop {string} className
*
* {@link https://github.com/iluwatar/java-design-patterns/tree/master/chain chain-pattern}
* @see {@link chain-pattern}
*
* @see ChainedMap
* @see ChainedSet
*
* @tests Chainable
* @types Chainable
*
*/
/**
* @since 0.0.1
* @memberOf Chainable
*
* @param {Chainable | any | ParentType} parent ParentType
* @constructor
*
* @example
*
* class ChainedMap extends Chainable {}
* const map = new ChainedMap()
* map.className
* //=> ChainedMap
*
*/
// var Chainable = (function(superClass) {
// console.log('@TODO!!! ADD POOLED CACHE, ADD DESTRUCTOR, DESTRUCTOR NEEDS TO CALL META')
// // Chainable,
// // console.log(superClass)
// function _Chainable(parent) {
// console.log({parent, superClass})
// if (isFunction(superClass)) {
// console.log('super is fn', {superClass, parent})
// if (isUndefined(parentArgs)) {
// superClass.call(this, parent)
// }
// else {
// superClass.call(this)
// }
// }
// // @TODO remove this if
// // if (parent)
// if (hasConstructMethod(this)) this.construct(parent)
// // .bind(this, true)
// if (!hasDestructor(this)) this.destructor = this.clear
// this.className = this.constructor.name
// this.parent = parent
// // @NOTE needed by babel & ts, buble is not-compat
// return this
// }
// Object.defineProperty(_Chainable, ChainSymbol, {value: ChainSymbol})
// // _Chainable[ChainSymbol] = ChainSymbol
// return _Chainable
// // if (isUndefined(superClass)) {
// // ChainableObject.create(Parent)
// // }
// })
// constructor(parent) {
// if (isUndefined(parentArgs)) super()
// else super(parent)
//
// // @TODO remove this
// if (parent) this.parent = parent
// if (hasConstructMethod(this)) this.construct(parent)
//
// this.className = this.constructor.name
// this.destructor = this.clear // .bind(this, true)
//
// // @NOTE needed by babel & ts, buble is not-compat
// return this
// }
var Chainable = (function (Target) {
function Chainable(parent) {
Target.call(this)
// if (hasConstructMethod(this)) this.construct(parent)
this.className = this.constructor.name
this.parent = parent
}
if ( Target ) Chainable.__proto__ = Target;
Chainable.prototype = Object.create( Target && Target.prototype );
Chainable.prototype.constructor = Chainable;
return Chainable;
}(Target));
Chainable.prototype.destructor = function() {
if (hasDestructorMethod(Target.prototype)) {
Target.prototype.destructor.call(this)
}
this.clear()
this.parent = undefined
}
// pre-initialize type && allocation?
Chainable.prototype.className = Chainable.constructor.name
// Chainable.prototype.construct = noop
// Chainable.prototype.destructor = noop
// @TODO
// https://github.com/facebook/immutable-js/blob/master/src/Hash.js
// http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
// observe on every `set` ?
Chainable.hashCode = function() {
// this.store.size
// this.className
}
/**
* @desc for ending nested chains
* @since 0.4.0
* @memberOf Chainable
*
* @return {Chainable | any}
*
* @see Chainable.parent
* @see FactoryChain
*
* @example
*
* const parent = 'eh'
* const child = newChain(parent)
* child.end()
* //=> 'eh'
*
*/
Chainable.prototype.end = valueMethod('parent')
/**
* @see fp/when
* @type {Function}
*/
Chainable.prototype.when = when
/**
* @desc clears the map,
* goes through this properties,
* calls .clear if they are instanceof Chainable or Map
*
* @memberOf Chainable
* @since 4.0.0 (moved only to Chainable, added option to clear this keys)
* @since 0.4.0 (in ChainedMap)
* @since 0.3.0 (in Chainable)
*
* @param {boolean | undefined} [clearPropertiesThatAreChainLike=true] checks properties on the object, if they are `chain-like`, clears them as well
* @return {Chainable} @chainable
*
* @see https://github.com/fliphub/flipchain/issues/2
* @see ChainedSet
* @see ChainedMap
*
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/clear map-clear}
* @see {@link map-clear}
*
* @example
*
* const chain = new Chain()
* chain.set('eh', 1)
* chain.entries()
* //=> {eh: 1}
* chain.clear()
* chain.entries()
* //=> {}
*
*/
Chainable.prototype.clear = function(clearPropertiesThatAreChainLike) {
var this$1 = this;
if ( clearPropertiesThatAreChainLike === void 0 ) clearPropertiesThatAreChainLike = true;
this.store.clear()
if (isFalse(clearPropertiesThatAreChainLike)) { return this }
// @TODO
// filterMap(this, (value, key) => {
// if (shouldClear(key, value)) value.clear()
// })
var keys = ObjectKeys(this)
for (var k = 0; k < keys.length; k++) {
var key = keys[k]
var property = this$1[key]
if (shouldClear(key, property)) { this$1[key].clear() }
}
return this
}
/**
* @desc calls .delete on this.store.map
* @since 0.3.0
* @memberOf Chainable
*
* @param {Primitive} key on a Map: key referencing the value. on a Set: the index
* @return {Chainable}
*
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/delete mozilla-map-delete}
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/delete mozilla-set-delete}
* @see {@link mozilla-map-delete}
* @see {@link mozilla-set-delete}
* @see ChainedSet
* @see ChainedMap
*
* @example
*
* const chain = new Chain()
* chain.set('eh', 1)
* chain.get('eh')
* //=> 1
*
* chain.delete('eh', 1)
* chain.get('eh')
* //=> undefined
*
*/
Chainable.prototype['delete'] = function(key) {
this.store.delete(key)
return this
}
/**
* @desc checks whether the store has a value for a given key
* @memberOf Chainable
* @since 0.3.0
*
* @param {any} keyOrValue key when Map, value when Set
* @return {boolean} `this.store.has(keyOrValue)`
*
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/has mozilla-map-has}
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/has mozilla-set-has}
* @see {@link mozilla-map-has}
* @see {@link mozilla-set-has}
*
* @example
*
* const chain = new Chain()
* chain.set('eh', 1).has('eh')
* //=> true
* chain.has('canada')
* //=> false
*
*/
Chainable.prototype.has = function(keyOrValue) {
return this.store.has(keyOrValue)
}
/**
* @desc spreads the entries from ChainedMap.store.values
* allocates a new array, adds the values from the iterator
*
* @memberOf Chainable
* @since 0.4.0
*
* @return {Array<any>} toArr(this.store.values())
*
* @NOTE look at Chainable.constructor to ensure not to use `new Array...`
* @NOTE moved from ChainedMap and ChainedSet to Chainable @2.0.2
* @NOTE this was [...] & Array.from(this.store.values())
*
* {@link https://kangax.github.io/compat-table/es6/#test-Array_static_methods compat-array-static-methods}
* {@link https://stackoverflow.com/questions/20069828/how-to-convert-set-to-array set-to-array}
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/values mozilla-map-values}
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/values mozilla-set-values}
*
* @see {@link mozilla-map-values}
* @see {@link mozilla-set-values}
* @see {@link compat-array-static-methods}
* @see {@link set-to-array}
*
*
* @example
*
* const chain = new Chain()
* chain.set('eh', 1)
* chain.values()
* //=> [1]
*
*/
Chainable.prototype.values = function() {
return ArrayFrom(this.store.values())
}
// --- symbols ---
/**
* @desc Iterator for looping values in the store
*
* @memberOf Chainable
* @since 0.5.0
* @version 5.0.0 <- uses.keys > keys(entries())
*
* @type {generator}
* @return {Object} {value: undefined | any, done: true | false}
*
* @NOTE assigned to a variable so buble ignores it
* @NOTE both Map & Set collections iterate with `[key, val]`
*
* @see https://www.typescriptlang.org/docs/handbook/iterators-and-generators.html
* @see http://exploringjs.com/es6/ch_iteration.html#_maps-1
* @see https://github.com/sindresorhus/quick-lru/blob/master/index.js
* @see https://stackoverflow.com/questions/36976832/what-is-the-meaning-of-symbol-iterator-in-this-context
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/iterator
* @see this.store
*
* @tests iteration
*
* @example
*
* const chain = new Chain().set('eh', 1)
* for (var [key, val] of chain) console.log({[key]: val})
* //=> {eh: 1}
*
* @example
*
* *[Symbol.iterator](): void { for (const item of this.store) yield item }
*
* @example
*
* const {ChainedSet} = require('chain-able')
* const set = new ChainedSet()
* set.add('eh')
*
* for (const arr of set) {
* const [key, val] = arr
*
* key //=> 0
* val //=> 'eh'
* arr.length //=> 2
* }
*
*/
Chainable.prototype[SymbolIterator] = function() {
return keyValueToIterator(this.keys(), this.values(), this.store.size)
}
/**
* @desc symbol method for toString, toJSON, toNumber
* @memberOf Chainable
* @since 1.0.2
* @version 2
*
* @param {string} hint enum[default, string, number]
* @return {Primitive}
*
* {@link http://2ality.com/2015/09/well-known-symbols-es6.html#default-tostring-tags well-known-symbols-es6}
* @see {@link well-known-symbols-es6}
*
* @example
*
* const chain = new Chain()
* chain.toNumber = () => 1
* +chain;
* //=> 1
* chain + 1
* //=>
*
* @example
*
* const chain = new Chain()
* chain.toString = () => 'eh'
* chain + ''
* //=> 'eh'
*
*/
Chainable.prototype[SymbolPrimitive] = function(hint) {
/* prettier-ignore */
/**
* hint === 'number'
* `s`tring is 115
* `n`umber is 110
* 110 & 4 = 1
* 115 & 4 = 0
*
* if (hint === 'string' && this.toJSON) return this.toJSON()
* else if (hint === 'number' && this.toNumber) return this.toNumber()
*/
if (hint === 'number' && this.toNumber) { return this.toNumber() }
// hint === 'string'
if (this.toJSON) { return this.toJSON() }
// hint === 'default'
return this.toString()
}
/**
* @memberOf Chainable
* @name length
* @method length
* @readonly
* @since 0.5.0
* @see ChainedMap.store
* @return {number}
* @example for (var i = 0; i < chain.length; i++)
*/
ObjectDefine(Chainable.prototype, 'length', {
enumerable: false,
get: function get() {
return this.store.size
},
})
ObjectDefine(Chainable.prototype, SymbolInstance, {
enumerable: false,
value: function (instance) { return instance &&
(isPrototypeOf(Chainable.prototype, instance) || hasStore(instance)); },
})
// @TODO to wrap in toFunction but keep prototype
// return function(parent) {
// const instance = new Chainable(parent)
// // console.log({instance}, instance.end)
// return instance
// }
return Chainable
}
/**
* @since 3.0.0
* @func
* @example
*
* class Target {}
* const TargetChain = Chainable.compose(Target)
* const chain = new TargetChain()
* chain instanceof Target
* //=> true
*
*/
var c = composer(ComposeChainable, noop)
module.exports = c
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"file":"Chainable.js","sources":["Chainable.js"],"sourcesContent":["/* eslint dot-notation: \"OFF\" */\n\nconst ENV_DEVELOPMENT = require('./deps/env/dev')\nconst SymbolIterator = require('./deps/symbols/iterator')\nconst SymbolInstance = require('./deps/symbols/instance')\nconst SymbolPrimitive = require('./deps/symbols/primitive')\nconst isPrototypeOf = require('./deps/is/prototypeOf')\nconst isMap = require('./deps/is/map')\nconst isSet = require('./deps/is/set')\nconst isNull = require('./deps/is/null')\nconst isUndefined = require('./deps/is/undefined')\nconst isString = require('./deps/is/string')\nconst isFunction = require('./deps/is/function')\nconst isFalse = require('./deps/is/false')\nconst ownPropertyIs = require('./deps/is/ownPropertyIs')\nconst noop = require('./deps/util/noop')\nconst ObjectKeys = require('./deps/util/keys')\nconst ObjectDefine = require('./deps/util/define')\nconst ignored = require('./deps/meta/ignored')\nconst ArrayFrom = require('./deps/util/from')\nconst keyValueToIterator = require('./deps/cast/keyValueToIterator')\nconst hasOwnPropertyFlipped = require('./deps/flipped/hasOwnPropertyFlipped')\nconst when = require('./deps/fp/when')\nconst composer = require('./compose/composer')\nconst pathSatisfies = require('./deps/fp/propSatisfies')\n\nconst hasStore = hasOwnPropertyFlipped('store')\nconst hasConstructMethod = pathSatisfies('construct', isFunction)\nconst hasDestructorMethod = pathSatisfies('destructor', isFunction)\n\n// @TODO change from `||` to if else\nconst shouldClear = (key, property) =>\n  !ignored(key) &&\n  (isMap(property) || isSet(property) || hasStore(property))\n\n\n// @TODO would just be `always(prop(name))`\nfunction valueMethod(name) {\n  return function() {\n    return this[name]\n  }\n}\n\n// const SymbolFor = x => x // Symbol.for\n// const ChainSymbol = SymbolFor('⛓')\n// const ChainExtendedSymbol = SymbolFor('🍬')\n\n// @TODO add back option to send args to parent\nconst ComposeChainable = (Target, parentArgs) => {\n  /* istanbul ignore next: dev */\n  if (ENV_DEVELOPMENT) {\n    if (!Target || !Target.prototype) {\n      console.log({Target})\n      // throw new TypeError('did not have a super class / target base')\n    }\n  }\n\n  /**\n   * @desc Trait class that can inherit any class passed into compose, extended by ChainedMap & ChainedSet\n   *\n   * @member Chainable\n   * @class Chainable\n   * @category Chainable\n   * @type {Chainable}\n   *\n   * @prop {Chainable | any} parent\n   * @prop {string} className\n   *\n   * {@link https://github.com/iluwatar/java-design-patterns/tree/master/chain chain-pattern}\n   * @see {@link chain-pattern}\n   *\n   * @see ChainedMap\n   * @see ChainedSet\n   *\n   * @tests Chainable\n   * @types Chainable\n   *\n   */\n\n\n  /**\n   * @since 0.0.1\n   * @memberOf Chainable\n   *\n   * @param {Chainable | any | ParentType} parent ParentType\n   * @constructor\n   *\n   * @example\n   *\n   *    class ChainedMap extends Chainable {}\n   *    const map = new ChainedMap()\n   *    map.className\n   *    //=> ChainedMap\n   *\n   */\n\n  // var Chainable = (function(superClass) {\n  //   console.log('@TODO!!! ADD POOLED CACHE, ADD DESTRUCTOR, DESTRUCTOR NEEDS TO CALL META')\n  //   // Chainable,\n  //   // console.log(superClass)\n  //   function _Chainable(parent) {\n  //     console.log({parent, superClass})\n  //     if (isFunction(superClass)) {\n  //       console.log('super is fn', {superClass, parent})\n  //       if (isUndefined(parentArgs)) {\n  //         superClass.call(this, parent)\n  //       }\n  //       else {\n  //         superClass.call(this)\n  //       }\n  //     }\n\n  //     // @TODO remove this if\n  //     // if (parent)\n  //     if (hasConstructMethod(this)) this.construct(parent)\n  //     // .bind(this, true)\n  //     if (!hasDestructor(this)) this.destructor = this.clear\n  //     this.className = this.constructor.name\n  //     this.parent = parent\n  //     // @NOTE needed by babel & ts, buble is not-compat\n  //     return this\n  //   }\n  //   Object.defineProperty(_Chainable, ChainSymbol, {value: ChainSymbol})\n  //   // _Chainable[ChainSymbol] = ChainSymbol\n  //   return _Chainable\n  //   // if (isUndefined(superClass)) {\n  //   //   ChainableObject.create(Parent)\n  //   // }\n  // })\n\n  // constructor(parent) {\n  //   if (isUndefined(parentArgs)) super()\n  //   else super(parent)\n  //\n  //   // @TODO remove this\n  //   if (parent) this.parent = parent\n  //   if (hasConstructMethod(this)) this.construct(parent)\n  //\n  //   this.className = this.constructor.name\n  //   this.destructor = this.clear // .bind(this, true)\n  //\n  //   // @NOTE needed by babel & ts, buble is not-compat\n  //   return this\n  // }\n\n  class Chainable extends Target {\n    constructor(parent) {\n      super()\n\n      // if (hasConstructMethod(this)) this.construct(parent)\n      this.className = this.constructor.name\n      this.parent = parent\n    }\n  }\n\n  Chainable.prototype.destructor = function() {\n    if (hasDestructorMethod(Target.prototype)) {\n      Target.prototype.destructor.call(this)\n    }\n    this.clear()\n    this.parent = undefined\n  }\n\n  // pre-initialize type && allocation?\n  Chainable.prototype.className = Chainable.constructor.name\n  // Chainable.prototype.construct = noop\n  // Chainable.prototype.destructor = noop\n\n  // @TODO\n  // https://github.com/facebook/immutable-js/blob/master/src/Hash.js\n  // http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/\n  // observe on every `set` ?\n  Chainable.hashCode = function() {\n    // this.store.size\n    // this.className\n  }\n\n  /**\n   * @desc for ending nested chains\n   * @since 0.4.0\n   * @memberOf Chainable\n   *\n   * @return {Chainable | any}\n   *\n   * @see Chainable.parent\n   * @see FactoryChain\n   *\n   * @example\n   *\n   *    const parent = 'eh'\n   *    const child = newChain(parent)\n   *    child.end()\n   *    //=> 'eh'\n   *\n   */\n  Chainable.prototype.end = valueMethod('parent')\n\n  /**\n   * @see fp/when\n   * @type {Function}\n   */\n  Chainable.prototype.when = when\n\n  /**\n   * @desc clears the map,\n   *       goes through this properties,\n   *       calls .clear if they are instanceof Chainable or Map\n   *\n   * @memberOf Chainable\n   * @since 4.0.0 (moved only to Chainable, added option to clear this keys)\n   * @since 0.4.0 (in ChainedMap)\n   * @since 0.3.0 (in Chainable)\n   *\n   * @param {boolean | undefined} [clearPropertiesThatAreChainLike=true] checks properties on the object, if they are `chain-like`, clears them as well\n   * @return {Chainable} @chainable\n   *\n   * @see https://github.com/fliphub/flipchain/issues/2\n   * @see ChainedSet\n   * @see ChainedMap\n   *\n   * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/clear map-clear}\n   * @see {@link map-clear}\n   *\n   * @example\n   *\n   *    const chain = new Chain()\n   *    chain.set('eh', 1)\n   *    chain.entries()\n   *    //=> {eh: 1}\n   *    chain.clear()\n   *    chain.entries()\n   *    //=> {}\n   *\n   */\n  Chainable.prototype.clear = function(clearPropertiesThatAreChainLike = true) {\n    this.store.clear()\n\n    if (isFalse(clearPropertiesThatAreChainLike)) return this\n\n    // @TODO\n    // filterMap(this, (value, key) => {\n    //   if (shouldClear(key, value)) value.clear()\n    // })\n\n    const keys = ObjectKeys(this)\n    for (let k = 0; k < keys.length; k++) {\n      const key = keys[k]\n      const property = this[key]\n      if (shouldClear(key, property)) this[key].clear()\n    }\n\n    return this\n  }\n\n  /**\n   * @desc calls .delete on this.store.map\n   * @since 0.3.0\n   * @memberOf Chainable\n   *\n   * @param {Primitive} key on a Map: key referencing the value. on a Set: the index\n   * @return {Chainable}\n   *\n   * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/delete mozilla-map-delete}\n   * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/delete mozilla-set-delete}\n   * @see {@link mozilla-map-delete}\n   * @see {@link mozilla-set-delete}\n   * @see ChainedSet\n   * @see ChainedMap\n   *\n   * @example\n   *\n   *    const chain = new Chain()\n   *    chain.set('eh', 1)\n   *    chain.get('eh')\n   *    //=> 1\n   *\n   *    chain.delete('eh', 1)\n   *    chain.get('eh')\n   *    //=> undefined\n   *\n   */\n  Chainable.prototype['delete'] = function(key) {\n    this.store.delete(key)\n    return this\n  }\n\n  /**\n   * @desc checks whether the store has a value for a given key\n   * @memberOf Chainable\n   * @since 0.3.0\n   *\n   * @param {any} keyOrValue key when Map, value when Set\n   * @return {boolean} `this.store.has(keyOrValue)`\n   *\n   * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/has mozilla-map-has}\n   * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/has mozilla-set-has}\n   * @see {@link mozilla-map-has}\n   * @see {@link mozilla-set-has}\n   *\n   * @example\n   *\n   *   const chain = new Chain()\n   *   chain.set('eh', 1).has('eh')\n   *   //=> true\n   *   chain.has('canada')\n   *   //=> false\n   *\n   */\n  Chainable.prototype.has = function(keyOrValue) {\n    return this.store.has(keyOrValue)\n  }\n\n  /**\n   * @desc spreads the entries from ChainedMap.store.values\n   *       allocates a new array, adds the values from the iterator\n   *\n   * @memberOf Chainable\n   * @since 0.4.0\n   *\n   * @return {Array<any>} toArr(this.store.values())\n   *\n   * @NOTE look at Chainable.constructor to ensure not to use `new Array...`\n   * @NOTE moved from ChainedMap and ChainedSet to Chainable @2.0.2\n   * @NOTE this was [...] & Array.from(this.store.values())\n   *\n   * {@link https://kangax.github.io/compat-table/es6/#test-Array_static_methods compat-array-static-methods}\n   * {@link https://stackoverflow.com/questions/20069828/how-to-convert-set-to-array set-to-array}\n   * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/values mozilla-map-values}\n   * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/values mozilla-set-values}\n   *\n   * @see {@link mozilla-map-values}\n   * @see {@link mozilla-set-values}\n   * @see {@link compat-array-static-methods}\n   * @see {@link set-to-array}\n   *\n   *\n   * @example\n   *\n   *  const chain = new Chain()\n   *  chain.set('eh', 1)\n   *  chain.values()\n   *  //=> [1]\n   *\n   */\n  Chainable.prototype.values = function() {\n    return ArrayFrom(this.store.values())\n  }\n\n  // --- symbols ---\n\n  /**\n   * @desc Iterator for looping values in the store\n   *\n   * @memberOf Chainable\n   * @since 0.5.0\n   * @version 5.0.0 <- uses.keys > keys(entries())\n   *\n   * @type {generator}\n   * @return {Object} {value: undefined | any, done: true | false}\n   *\n   * @NOTE assigned to a variable so buble ignores it\n   * @NOTE both Map & Set collections iterate with `[key, val]`\n   *\n   * @see https://www.typescriptlang.org/docs/handbook/iterators-and-generators.html\n   * @see http://exploringjs.com/es6/ch_iteration.html#_maps-1\n   * @see https://github.com/sindresorhus/quick-lru/blob/master/index.js\n   * @see https://stackoverflow.com/questions/36976832/what-is-the-meaning-of-symbol-iterator-in-this-context\n   * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/iterator\n   * @see this.store\n   *\n   * @tests iteration\n   *\n   * @example\n   *\n   *    const chain = new Chain().set('eh', 1)\n   *    for (var [key, val] of chain) console.log({[key]: val})\n   *    //=> {eh: 1}\n   *\n   * @example\n   *\n   *    *[Symbol.iterator](): void { for (const item of this.store) yield item }\n   *\n   * @example\n   *\n   *    const {ChainedSet} = require('chain-able')\n   *    const set = new ChainedSet()\n   *    set.add('eh')\n   *\n   *    for (const arr of set) {\n   *      const [key, val] = arr\n   *\n   *      key        //=> 0\n   *      val        //=> 'eh'\n   *      arr.length //=> 2\n   *    }\n   *\n   */\n  Chainable.prototype[SymbolIterator] = function() {\n    return keyValueToIterator(this.keys(), this.values(), this.store.size)\n  }\n\n  /**\n   * @desc symbol method for toString, toJSON, toNumber\n   * @memberOf Chainable\n   * @since 1.0.2\n   * @version 2\n   *\n   * @param {string} hint enum[default, string, number]\n   * @return {Primitive}\n   *\n   * {@link http://2ality.com/2015/09/well-known-symbols-es6.html#default-tostring-tags well-known-symbols-es6}\n   * @see {@link well-known-symbols-es6}\n   *\n   * @example\n   *\n   *  const chain = new Chain()\n   *  chain.toNumber = () => 1\n   *  +chain;\n   *  //=> 1\n   *  chain + 1\n   *  //=>\n   *\n   * @example\n   *\n   *  const chain = new Chain()\n   *  chain.toString = () => 'eh'\n   *  chain + ''\n   *  //=> 'eh'\n   *\n   */\n  Chainable.prototype[SymbolPrimitive] = function(hint) {\n    /* prettier-ignore */\n    /**\n     * hint === 'number'\n     * `s`tring is 115\n     * `n`umber is 110\n     * 110 & 4 = 1\n     * 115 & 4 = 0\n     *\n     * if (hint === 'string' && this.toJSON) return this.toJSON()\n     * else if (hint === 'number' && this.toNumber) return this.toNumber()\n     */\n    if (hint === 'number' && this.toNumber) return this.toNumber()\n\n    // hint === 'string'\n    if (this.toJSON) return this.toJSON()\n\n    // hint === 'default'\n    return this.toString()\n  }\n\n  /**\n   * @memberOf Chainable\n   * @name length\n   * @method length\n   * @readonly\n   * @since 0.5.0\n   * @see ChainedMap.store\n   * @return {number}\n   * @example for (var i = 0; i < chain.length; i++)\n   */\n  ObjectDefine(Chainable.prototype, 'length', {\n    enumerable: false,\n    get() {\n      return this.store.size\n    },\n  })\n  ObjectDefine(Chainable.prototype, SymbolInstance, {\n    enumerable: false,\n    value: instance =>\n      instance &&\n      (isPrototypeOf(Chainable.prototype, instance) || hasStore(instance)),\n  })\n\n  // @TODO to wrap in toFunction but keep prototype\n  // return function(parent) {\n  //   const instance = new Chainable(parent)\n  //   // console.log({instance}, instance.end)\n  //   return instance\n  // }\n\n  return Chainable\n}\n\n/**\n * @since 3.0.0\n * @func\n * @example\n *\n *  class Target {}\n *  const TargetChain = Chainable.compose(Target)\n *  const chain = new TargetChain()\n *  chain instanceof Target\n *  //=> true\n *\n */\nconst c = composer(ComposeChainable, noop)\n\nmodule.exports = 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