map-obj - npm Package Compare versions

Comparing version 1.0.1 to 2.0.0

index.js

		'use strict';
		module.exports = function (obj, cb) {
		var ret = {};
		var keys = Object.keys(obj);

		for (var i = 0; i < keys.length; i++) {
		var key = keys[i];
		var res = cb(key, obj[key], obj);
		ret[res[0]] = res[1];
		// customized for this use-case
		const isObject = x =>
		typeof x === 'object' &&
		x !== null &&
		!(x instanceof RegExp) &&
		!(x instanceof Error) &&
		!(x instanceof Date);

		module.exports = function mapObj(obj, fn, opts, seen) {
		opts = Object.assign({
		deep: false,
		target: {}
		}, opts);

		seen = seen \|\| new WeakMap();

		if (seen.has(obj)) {
		return seen.get(obj);
		}

		return ret;
		seen.set(obj, opts.target);

		const target = opts.target;
		delete opts.target;

		for (const key of Object.keys(obj)) {
		const val = obj[key];
		const res = fn(key, val, obj);
		let newVal = res[1];

		if (opts.deep && isObject(newVal)) {
		if (Array.isArray(newVal)) {
		newVal = newVal.map(x => isObject(x) ? mapObj(x, fn, opts, seen) : x);
		} else {
		newVal = mapObj(newVal, fn, opts, seen);
		}
		}

		target[res[0]] = newVal;
		}

		return target;
		};

package.json

		{
		"name": "map-obj",
		"version": "1.0.1",
		"version": "2.0.0",
		"description": "Map object keys and values into a new object",
		@@ -13,6 +13,6 @@ "license": "MIT",
		"engines": {
		"node": ">=0.10.0"
		"node": ">=4"
		},
		"scripts": {
		"test": "node test.js"
		"test": "xo && ava"
		},
		@@ -32,7 +32,16 @@ "files": [
		"iterate",
		"iterator"
		"iterator",
		"rename",
		"modify",
		"deep",
		"recurse",
		"recursive"
		],
		"devDependencies": {
		"ava": "0.0.4"
		"ava": "*",
		"xo": "*"
		},
		"xo": {
		"esnext": true
		}
		}

readme.md

		@@ -16,9 +16,5 @@ # map-obj [![Build Status](https://travis-ci.org/sindresorhus/map-obj.svg?branch=master)](https://travis-ci.org/sindresorhus/map-obj)
		```js
		var mapObj = require('map-obj');
		const mapObj = require('map-obj');

		var newObject = mapObj({foo: 'bar'}, function (key, value, object) {
		// first element is the new key and second is the new value
		// here we reverse the order
		return [value, key];
		});
		const newObject = mapObj({foo: 'bar'}, (key, value) => [value, key]);
		//=> {bar: 'foo'}
		@@ -28,4 +24,44 @@ ```

		## API

		### mapObj(source, mapper, [options])

		#### source

		Type: `Object`

		Source object to copy properties from.

		#### mapper

		Type: `Function`

		Mapping function.

		- It has signature `mapper(sourceKey, sourceValue, source)`.
		- It must return a two item array: `[targetKey, targetValue]`.

		#### deep

		Type: `boolean`<br>
		Default: `false`

		Recurse nested objects and objects in arrays.

		#### target

		Type: `Object`<br>
		Default: `{}`

		Target object to map properties on to.


		## Related

		- [filter-obj](https://github.com/sindresorhus/filter-obj) - Filter object keys and values into a new object
		- [object-assign](https://github.com/sindresorhus/object-assign) - Copy enumerable own properties from one or more source objects to a target object


		## License

		MIT © [Sindre Sorhus](http://sindresorhus.com)
		MIT © [Sindre Sorhus](https://sindresorhus.com)

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