deeps

High performance utilities for dealing with nested objects.

get (object, path, joiner)

Deep gets an object property value.

const obj = {
  some: {
    deep: {
      prop: 'foobar',
    },
  },
};
 
const prop = deeps.get(obj, 'some.deep.prop'); // foobar
const prop = deeps.get(obj, 'some.deep.key'); // undefined

set (object, path, value, initPaths, joiner)

Deep sets an object property value.

const obj = {
  some: {
    deep: {
      prop: 'foobar',
    },
  },
};
 
deeps.set(obj, 'some.deep.prop', 'barbaz');

keys (object, joiner)

Same as Object.keys except deeply.

const obj = {
  some: {
    deep: {
      prop: 'foobar',
      key: 'barbaz',
    },
  },
};
 
const keys = deeps.keys(object); // ['some.deep.prop', 'some.deep.key']

diff (objectA, objectB)

Returns an object of differences between to objects.

const obj1 = {
  a: 1,
  b: 3,
};
 
const obj2 = {
  a: 2,
  b: 3,
};
 
const diff = deeps.keys(obj1, obj2); // { a: 2 }

merge (target, source)

Same as Object.assign but deeply.

const target = {
  a: 1,
  b: {
    c: 2,
  },
};
const source = {
  a: 1,
  b: {
    c: 2,
    d: 3,
  },
};
 
deeps.merge(target, source);
// target = { a: 1, b: { c: 2, d: 3 } }

values (object, joiner)

const object = {
  a: 1,
  b: {
    c: 2,
    d: 3,
  },
};
 
deeps.values(object); // [1, 2, 3]

flatten (object, joiner)

Flattens an object to an object of key paths with the values

const object = {
  a: 1,
  b: {
    c: 2,
    d: {
      e: 3,
      f: 4
    },
  },
};
 
const flatten = deeps.flatten(object);
 
// flatten:
{
  'a': 1,
  'b.c': 2,
  'b.d.e': 3,
  'b.d.f': 4,
}
 

unflatten

Unflattens an object of key paths (reverse flatten)

const object = {
  'a': 1,
  'b.c': 2,
  'b.d.e': 3,
  'b.d.f': 4,
}
 
const unflatten = deeps.unflatten(object);
 
// unflatten:
{
  a: 1,
  b: {
    c: 2,
    d: {
      e: 3,
      f: 4,
    },
  },
};

mapToProps

TODO

Why?

I've been using these utils a lot in personal projects so made sense to move them into a module. (and I wanted to make them more efficient ;p)

Benchmarks

Platform info:
Darwin 15.6.0 x64
Node.JS 6.8.1
V8 5.1.281.84
Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz × 8



DIFF: deeply nested object x 1,305,372 ops/sec ±1.73% (89 runs sampled)
FLATTEN: deeply nested with array x 1,574,470 ops/sec ±1.57% (87 runs sampled)
GET: single depth x 10,753,107 ops/sec ±0.90% (92 runs sampled)
GET: deeply nested with array x 6,302,773 ops/sec ±1.72% (89 runs sampled)
SET: single depth x 7,480,487 ops/sec ±1.91% (84 runs sampled)
SET: deeply nested with array x 6,010,088 ops/sec ±0.91% (93 runs sampled)