diff values

npm install jsdiff

returns an object with truthy values for stuff that changed.

diff({ a: 'foo' }, {}) -> { a: true }

diff({ a: 'foo' }, { a: 'bar' }) -> { a: true }

diff({ a: 'foo' }, { b: 'bar' }) -> { a: true, b: true }

diff({}, { b: 'foo' }) -> { b: true }

diff({ a: { b: 'foo'} }, { b: 'bar' }) -> { a: { b: true }, b: true }

diff([1, 2, 3], [1, 2, 4]) -> [ , , true ]

patch up a model using a diff.

var a = { a: 'foo' }
  , b = { b: 'bar', c: { deep: 'stuff' } }
diff.patch(diff(a, b), b,
  { set: console.log.bind(console, 'set')
  , delete: console.log.bind(console, 'delete')
  })

output:

delete [ 'a' ]
set [ 'b' ] bar
set [ 'c', 'deep' ] stuff