vget

Gets a value from a collection that strictly or loosely equals another value.

Installation

Requires Node.js 8.3.0 or above.

npm i vget

API

The module exports a get() function that has one other function attached to it as a method: get.any().

get()

Parameters

1. Bindable: collection (Array, Iterator, Map, Object, Set, string, Typed Array, or WeakSet): The collection from which to retrieve a value.
2. valueToMatch (any): The value to retrieve from the collection.
3. Optional: Object argument:
   • arrays / maps / sets / weakSets (arrays of classes/strings): Arrays of classes and/or string names of classes that should be treated as equivalent to Array/Map/Set/WeakSet (respectively).
   • elseReturn (any): A value to return if valueToMatch is not found. Defaults to undefined.
   • inObj (boolean): Whether or not to search inherited properties if collection is an Object (i.e. not another recognized type). Defaults to false.
   • loose (boolean): Whether or not to compare values loosely (as defined by looselyEquals). Defaults to false.
   • looselyEquals (function): A callback that accepts two values and returns true if they are to be considered equivalent or false otherwise. This argument is only used if loose is true. If omitted, the default behavior will, among other things, consider arrays/objects to be equal if they have the same entries.
   • preferStrict (boolean): Only applies if loose is true. If true, then strictly-identical values will be preferred over loosely-equivalent values. Otherwise, the first loosely-equivalent key found will be used, even if a strictly-identical one comes later. Defaults to false.
   • reflectObj (boolean): Whether or not to use reflection to include non-enumerable Object property values. Only takes effect if collection is an Object (i.e. not another recognized type). Defaults to false.

Return Values

• Returns a value from the collection that matches the search value either strictly or loosely (depending on the configured options).
• If no such value exists, returns elseReturn if provided; otherwise undefined.

Example

const get = require('vget')
 
const emptyObj = {}
const collection = [emptyObj]
 
get(collection, {}, {loose: true}) === emptyObj // true

get.any()

Use this function if you want to get the first value that matches any one of a set of values. The signature is the same as that of the main function except that the second parameter is called valuesToMatch and takes an iterable (such as an array or string).

Related

The “k” family of modules works on keyed/indexed collections.

• khas
• kget
• kedit
• kset
• kinc
• kdel

The “v” family of modules works on any collection of values.

• vhas
• vsize
• vadd
• vdel