This is the documentation of JsonDiffEx.

There are no runtime dependencies and it should be easy to use.

You can use the javascript library jsondiffpatch with it since it get’s it’s diff format from it.

It contains both diff and patch

Example

Diff

Simple example:

iex> JsonDiffEx.diff %{"test" => 1}, %{"test" => 2}
%{"test" => [1, 2]}

Now with list:

iex> JsonDiffEx.diff %{"test" => [1,2,3]}, %{"test" => [2,3]}
%{"test" => %{"_0" => [1, 0, 0], "_t" => "a"}}

Now with a map in the map:

iex> JsonDiffEx.diff %{"test" => %{"1": 1}}, %{"test" => %{"1": 2}}
%{"test" => %{"1": [1, 2]}}

Now with a map in an list in the map:

iex> JsonDiffEx.diff %{"test" => [%{"1": 1}]}, %{"test" => [%{"1": 2}]}
%{"test" => %{"0" => %{"1": [1, 2]}, "_t" => "a"}}

Patch

Simple example of a patch:

iex> JsonDiffEx.patch %{"test" => 1}, %{"test" => [1, 2]}
%{"test" => 2}

Now a patch with list:

iex> JsonDiffEx.patch %{"test" => [1,2,3]},
...> %{"test" => %{"_0" => [1, 0, 0], "_t" => "a"}}
%{"test" => [2,3]}

Now a patch with a map in the map:

iex> JsonDiffEx.patch %{"test" => %{"1": 1}}, %{"test" => %{"1": [1, 2]}}
%{"test" => %{"1": 2}}

Now with a map in an list in the map:

iex> JsonDiffEx.patch %{"test" => [%{"1": 1}]},
...> %{"test" => %{"0" => %{"1": [1, 2]}, "_t" => "a"}}
%{"test" => [%{"1": 2}]}