lodash-sift
A lodash "mixin" that returns a new object constructed using supplied paths into an existing object.
Description
Given a data object and a set of one or more dot-separated paths, _.sift() will
construct and return a new object composed of only the values found at the selected
paths.
Example
var _ = ; // returns lodash with sift mixin var data = // object from which to extract paths a: b: c: 1 d: 2 e: f: 3 g: 4 h: 5 6 7 i: name: 'foo' name: 'bar' ; var paths = // paths to extract from data 'a.b.d' 'a.e.g' 'h[2]' 'i[1].name' ; _ // => { a: { b: { d: 2 }, e: { g: 4 } }, h: 7, i: { name: 'bar' } }All paths must be terminal (they must end up at a non-object.)
If a path is non-terminal, it will result in an undefined value in the result, as in:
var data=a:b:c:1; _ // => { a: { b: undefined } }If a path does not exist, it will be undefined in the result, as in:
var data= a: b: c: 1 ; _ // => { a: { b: { foo: undefined } } }