Functions

flatMapObject.js

import flatMap from  'lodash/flatMap';
import keys from  'lodash/keys';
import get from  'lodash/get';
import identity from  'lodash/identity';
import isArray from  'lodash/isArray';
import isDate from  'lodash/isDate';
import isFunction from  'lodash/isFunction';
import isObject from  'lodash/isObject';
import map from  'lodash/map';
import zipObject from  'lodash/zipObject';


/**
 * Returns paths of an object such that { a: { b: { c: [1, 2, 3] } } }
 * becomes ['a.b.c']
 */
export const flatMapPaths = (
  obj,
  iteratee=identity,
  path=[]
) =>
  flatMap(keys(obj), (key, val) => {
    val = get(obj, key);
    key = [...path, key];

    return (
      ! isObject(val) || isArray(val) || isFunction(val) || isDate(val) ?
        iteratee(key.join('.'), val) : flatMapPaths(val, iteratee, key)
    )
  })
;

/**
 * Returns values given by flatMapPaths as an array
 */
export const flatMapValues = (
  obj,
  iteratee=identity,
  paths=flatMapPaths(obj)
) =>
  map(paths, (key) => iteratee(get(obj, key), key))
;

/**
 * Flattens nested objects such that { a: { b: { c: [1, 2, 3] } } }
 * becomes { 'a.b.c': [1, 2, 3] }
 */
export const flatMapObject = (
  obj,
  iterateeV=identity,
  iterateeK=identity,
  paths=flatMapPaths(obj, iterateeK)
) =>
  zipObject(paths, flatMapValues(obj, iterateeV, paths))
;

interleave.js

import _ from 'lodash'

const interleave = (...args) => {
    const weave = [];
    const sources = _.filter(args, _.isArray);
    const total = _.sumBy(sources, 'length');

    for(let i = 0; i < total; i++) {
        let index = i % sources.length;
        let source = sources[index];
        let value;
        [value, ...source] = source;
        sources[index] = source;
        weave.push(value);
    }

    return weave
}

package.json

{
  "name": "flatMapObject",
  "version": "1.0.0",
  "description": "Map object graph",
  "main": "flatMapObject.js",
  "repository": {
    "type": "git",
    "url": "git+https://gist.github.com/b1986bb0b6f3ddd02c47e1aeb5a46f6a.git"
  },
  "keywords": ["lodash", "flatMap", "graph"],
  "author": "Evan Schneider",
  "license": "ISC",
  "bugs": {
    "url": "https://gist.github.com/0c30bb9b858e95c32d0e8cc76c7662dd"
  },
  "dependencies": {
    "lodash": "4.*"
  },
  "homepage": "https://gist.github.com/b1986bb0b6f3ddd02c47e1aeb5a46f6a"
}