Merge pull request #16 from JSON8/concat

concat method

Author: sonnyp

README.md

@@ -16,6 +16,7 @@ JSON8 Patch passes the entire [json-patch-tests](https://github.com/json-patch/j
   * [revert](#revert)
   * [diff](#diff)
   * [valid](#valid)
+  * [concat](#concat)
   * [Operations](#operations)
     * [add](#add)
     * [remove](#remove)
@@ -137,6 +138,23 @@ ooPatch.valid([{op: "add", path: "/foo", value: "bar"}]) // true
 
 [↑](#json8-patch)
 
+## concat
+
+Concats multiple patches into one.
+
+```javascript
+var patch1 = [{op: "add", value: "bar", path: "/foo"}]
+var patch2 = [{op: "remove", path: "/foo"}]
+var patch = ooPatch.concat(patch1, patch2)
+
+// patch is
+[
+  {op: "add", value: "bar", path: "/foo"},
+  {op: "remove", path: "/foo"}
+]
+```
+
+[↑](#json8-patch)
 
 ## Operations
 

index.js

@@ -23,3 +23,6 @@ module.exports.has = require('./lib/has')
 // Packing
 module.exports.pack = require('./lib/pack')
 module.exports.unpack = require('./lib/unpack')
+
+// Utilities
+module.exports.concat = require('./lib/concat')

lib/concat.js

@@ -0,0 +1,9 @@
+'use strict'
+
+/**
+ * concat (or merge) multiple patches into one
+ * @returns {Array}
+ */
+module.exports = function concat(/* patch0, patch1, ... */) {
+  return [].concat.apply([], arguments)
+}

test/concat.js

@@ -0,0 +1,14 @@
+'use strict'
+
+import assert from 'assert'
+import concat from '../lib/concat'
+
+describe('concat', () => {
+  it('concats the patches into a bigger patch', () => {
+    const patch0 = [{}]
+    const patch1 = [{}]
+    const patch2 = [{}]
+    const patch = concat(patch0, patch1, patch2)
+    assert.deepEqual(patch, [{}, {}, {}])
+  })
+})