object-property-iterator

Traverse object properties, create mirror objects

Requirements

• ECMAScript 6 supports

Features

• Traverse own properties of an object

• Create mirror object by mapping/filtering properties

Usage

Import module

var {
    Root: ObjectIterable,
    ConfiguredPropertyIterable,
    AssignedPropertyIterable,
    AccessorPropertyIterable,
    iterate
} = require('object-property-iterator')

Create an ObjectIterable

Example: AssignedPropertyIterable

You can replace .assignments by .configures, .data, or .accessors to create other kinds of ObjectIterable

You can replace 'strings' by 'symbols' or 'keys' to traverse different types of property keys. Default is 'keys' if not provided

var iterable = iterate(object, 'strings').assignments

var iterable = new ObjectIterable(object, 'strings').assignments

var iterable = new AssignedPropertyIterable(object, 'strings')

Get an object from an ObjectIterable

var result = iterable.object

var result = iterable.getObject()

Examples

Create an object from another object throught a map function

Input

Define myprt yourself

var object = {
    a: 0, b: 1, c: 2,
    d: 3, e: 4, f: 5,
    __proto__: myprt
}

Output

The result should be equivalent to this action

var result = {
    A: 0, B: 1, C: 4,
    D: 9, E: 16, F: 25,
    __proto__: myprt
}

Codes

There're many ways to do the job

var result = iterate(object).assignments
    .map(([key, value]) => [key.toUpperCase(), value * value])
    .object

var result = iterate(object).assignments
    .keys.map(x => x.toUpperCase())
    .values.map(x => x * x)
    .object

var result = iterate(object)
    .mapAssignedProperties(([key, value]) => [key.toUpperCase(), value * value])
    .getObject()

var result = iterate(object)
    .mapAssignedPropertyKeys(x => x.toUpperCase())
    .mapAssignedPropertyValues(x => x * x)
    .getObject()

You can replace map by filter to create an object throught a filter function

License

MIT