ExtendedMap

This is a module extendeds native Map providing some extra features:

• return default value if the requested key does not exist
• protect against overrite of existing keys

Instalation

npm install @itavy/extended-map

Quick Example

const ExtendedMap = require('@itavy/extended-map').ExtendedMap;
const eMap = new ExtendedMap({
  defaultValue: 'myDefaultValue'
});

console.log('return value:', eMap.get('unknownkey'));

this will produce:

return value: myDefaultValue

API

Objects

itavy/extended-map : object

Typedefs

ExtendedMapOptions : Object

itavy/extended-map : object

Kind: global namespace

• itavy/extended-map : object
  • .ExtendedMap
    • new ExtendedMap([options])
    • .get()
    • .set()
  • .PromisedExtendedMap
    • new PromisedExtendedMap([options])
    • .defaultValue : *
    • .allowOverrite : Boolean
    • .doNotRejectHas : Boolean
    • .doNotRejectDelete : Boolean
    • .get() ⇒ Promise.<*>
    • .set() ⇒ Promise.<PromisedExtendedMap>
    • .has() ⇒ Promise.<Boolean>
    • .clear() ⇒ Promise.<undefined>
    • .delete() ⇒ Promise.<Boolean>
    • .values() ⇒ Promise.<Iterator>
    • .valuesAsArray() ⇒ Promise.<Array>
    • .keys() ⇒ Promise.<Iterator>
    • .keysAsArray() ⇒ Promise.<Array>
    • .entries() ⇒ Promise.<Iterator>
    • .entriesAsArray() ⇒ Promise.<Array>
    • .forEach() ⇒ Promise.<undefined>

itavy/extended-map.ExtendedMap

ExtendedMap native map wth a few enhancements

Kind: static class of itavy/extended-map

• .ExtendedMap
  • new ExtendedMap([options])
  • .get()
  • .set()

new ExtendedMap([options])

Param	Type	Default	Description
[options]	itavy/extended-map.ExtendedMapOptions	{}	Map options

extendedMap.get()

Wrapper for get if no value is found then default value will be returned

Kind: instance method of ExtendedMap
Access: public
See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/get

extendedMap.set()

Wrapper for set if override is not allowed it will throw an error

Kind: instance method of ExtendedMap
Access: public
See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/get

itavy/extended-map.PromisedExtendedMap

ExtendedMap native map wth a few enhancements

Kind: static class of itavy/extended-map

• .PromisedExtendedMap
  • new PromisedExtendedMap([options])
  • .defaultValue : *
  • .allowOverrite : Boolean
  • .doNotRejectHas : Boolean
  • .doNotRejectDelete : Boolean
  • .get() ⇒ Promise.<*>
  • .set() ⇒ Promise.<PromisedExtendedMap>
  • .has() ⇒ Promise.<Boolean>
  • .clear() ⇒ Promise.<undefined>
  • .delete() ⇒ Promise.<Boolean>
  • .values() ⇒ Promise.<Iterator>
  • .valuesAsArray() ⇒ Promise.<Array>
  • .keys() ⇒ Promise.<Iterator>
  • .keysAsArray() ⇒ Promise.<Array>
  • .entries() ⇒ Promise.<Iterator>
  • .entriesAsArray() ⇒ Promise.<Array>
  • .forEach() ⇒ Promise.<undefined>

new PromisedExtendedMap([options])

Param	Type	Default	Description
[options]	itavy/extended-map.ExtendedMapOptions	{}	Map options

promisedExtendedMap.defaultValue : *

Default value for non existing keys

Kind: instance property of PromisedExtendedMap
Default: undefined
Read only: true

promisedExtendedMap.allowOverrite : Boolean

Allow updating the keys

Kind: instance property of PromisedExtendedMap
Default: true
Read only: true

promisedExtendedMap.doNotRejectHas : Boolean

Weather to reject or not if the key does not exist

Kind: instance property of PromisedExtendedMap
Default: false
Read only: true

promisedExtendedMap.doNotRejectDelete : Boolean

Weather to reject or not if key to be deleted does not exist

Kind: instance property of PromisedExtendedMap
Default: false
Read only: true

promisedExtendedMap.get() ⇒ Promise.<*>

Promisified wrapper for get

Kind: instance method of PromisedExtendedMap
Returns: Promise.<*> - resolves with requested value or default value if none found
Access: public

promisedExtendedMap.set() ⇒ Promise.<PromisedExtendedMap>

Promisified wrapper for set it will resolve

Kind: instance method of PromisedExtendedMap
Returns: Promise.<PromisedExtendedMap> - resolves with the new map if overriting is allowed or the key does not exists, otherwise it will reject with an error
Access: public

promisedExtendedMap.has() ⇒ Promise.<Boolean>

Promisified wrapper for has

Kind: instance method of PromisedExtendedMap
Returns: Promise.<Boolean> - resolves with true if key exists or with false if doNotRejectHas is set otherwise it will reject with an error
Access: public

promisedExtendedMap.clear() ⇒ Promise.<undefined>

Promisified wrapper for clear

Kind: instance method of PromisedExtendedMap
Returns: Promise.<undefined> - resolves on success
Access: public

promisedExtendedMap.delete() ⇒ Promise.<Boolean>

Promisified wrapper for delete

Kind: instance method of PromisedExtendedMap
Returns: Promise.<Boolean> - resolves with true if key has been removed or with false if doNotRejectDelete is set otherwise it will reject with an error
Access: public

promisedExtendedMap.values() ⇒ Promise.<Iterator>

Promisified wrapper for values

Kind: instance method of PromisedExtendedMap
Returns: Promise.<Iterator> - resolves on success
Access: public

promisedExtendedMap.valuesAsArray() ⇒ Promise.<Array>

Iterate over all values and put them into an array

Kind: instance method of PromisedExtendedMap
Returns: Promise.<Array> - resolves with an array with all values

promisedExtendedMap.keys() ⇒ Promise.<Iterator>

Promisified wrapper for keys

Kind: instance method of PromisedExtendedMap
Returns: Promise.<Iterator> - resolves on success
Access: public

promisedExtendedMap.keysAsArray() ⇒ Promise.<Array>

Iterate over all keys and put them into an array

Kind: instance method of PromisedExtendedMap
Returns: Promise.<Array> - resolves with an array with all keys

promisedExtendedMap.entries() ⇒ Promise.<Iterator>

Promisified wrapper for entries

Kind: instance method of PromisedExtendedMap
Returns: Promise.<Iterator> - resolves on success
Access: public

promisedExtendedMap.entriesAsArray() ⇒ Promise.<Array>

Iterate over all elements and put them into an array

Kind: instance method of PromisedExtendedMap
Returns: Promise.<Array> - resolves with an array with all elements

promisedExtendedMap.forEach() ⇒ Promise.<undefined>

Promisified wrapper for forEach

Kind: instance method of PromisedExtendedMap
Returns: Promise.<undefined> - resolves on success
Access: public

ExtendedMapOptions : Object

Kind: global typedef
Properties

Name	Type	Default	Description
defaultValue	*		default value to return when none is found
allowOverrite	Boolean	true	if it is allowed to overrite an existing key

Usage

see Example

TODO

• refactor jsdoc
• add examples
• promisify some methods

LICENSE

MIT