Added node commandline example

Author: thedug

.gitignore

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 .DS_Store
 node_modules/
 .lone/
+.idea/
 npm-debug.log
 *.pyc

examples/node/README.md

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+```bash
+# Requirements: you must have curl installed and the json module for pretty formatting:
+npm install -g json;
+
+# Start our REST API server
+npm start;
+
+# Create the pets
+curl -s -X POST -H "Content-Type: application/json" http://localhost:3000/api/v1/pets -d "{\"_id\":1,\"type\":\"dog\"}"  | json -i;
+curl -s -X POST -H "Content-Type: application/json" http://localhost:3000/api/v1/pets -d "{\"_id\":2,\"type\":\"cat\"}"  | json -i;
+curl -s -X POST -H "Content-Type: application/json" http://localhost:3000/api/v1/pets -d "{\"_id\":3,\"type\":\"seabeast\"}"  | json -i;
+
+# View them
+curl -s -X GET -H "Accept: application/json" http://localhost:3000/api/v1/pets | json -i;
+
+# Use json patches to name them
+curl -s -X PUT -H "Content-Type: application/json" http://localhost:3000/api/v1/pets/1 -d "[{\"op\":\"add\",\"path\":\"/name\",\"value\":\"Arlo\"}]" | json -i;
+curl -s -X PUT -H "Content-Type: application/json" http://localhost:3000/api/v1/pets/2 -d "[{\"op\":\"add\",\"path\":\"/name\",\"value\":\"Basil\"}]" | json -i;
+curl -s -X PUT -H "Content-Type: application/json" http://localhost:3000/api/v1/pets/3 -d "[{\"op\":\"test\",\"path\":\"/type\",\"value\":\"seabeast\"},{\"op\":\"replace\",\"path\":\"/type\",\"value\":\"cat\"},{\"op\":\"add\",\"path\":\"/name\",\"value\":\"Kochka\"}]" | json -i;
+
+# Now view them again:
+curl -s -X GET -H "Accept: application/json" http://localhost:3000/api/v1/pets | json -i;
+```

examples/node/index.js

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+var mongoose = require('mongoose');
+var jiff = require('jiff');
+var async = require('async');
+var patchesToMongo = require('../..');
+
+mongoose.set('debug', true);
+
+// Models
+var Pet = mongoose.model('Pet', {
+  _id: Number,
+  name: String,
+  type: String
+}, 'pets');
+
+
+function getPet(id, callback){
+  Pet.findOne({_id: id}, function(err, pet){
+    if(err) return callback(err);
+    callback(null, pet.toJSON());
+  });
+};
+
+function updatePet(id, from, to){
+  return function(done){
+    console.log('update  pet');
+    var body = jiff.diff(from, to); //).replace(/"/g, '\\"');
+    console.log(body);
+    getPet(id, function(err, pet){
+      var patched = jiff.patch(body, pet);
+      var update = patchesToMongo(body);
+      Pet.update({_id: id}, update, function(err){
+        console.log(err || patched);
+        done()
+      });
+    });
+  };
+}
+
+function createPet(body){
+  return function(done) {
+    console.log('create  pet');
+    var pet = new Pet(body);
+    pet.save(function (err) {
+      console.log(err || pet);
+      done()
+    });
+  }
+}
+
+function listPets(callback){
+  console.log('list pets');
+  Pet.find(function(err, pet){
+    console.log(err || pet);
+    callback()
+  });
+}
+
+// Bin
+mongoose.connect('mongodb://localhost/test');
+
+function cleanup(done){
+  Pet.remove({}, function(err) {
+     console.log('Pet collection removed');
+    done(err);
+  });
+}
+
+function setup(done) {
+  console.log('# Create the pets');
+  async.series([
+    createPet({_id: 1, type: 'dog'}),
+    createPet({_id: 2, type: 'cat'}),
+    createPet({_id: 3, type: 'seabeast'})
+  ], function(err, result){
+    done(err);
+  });
+
+}
+
+function update(done) {
+  console.log('# Use json patches to name them');
+  async.series([
+    updatePet(1, {type: 'dog'}, {name: 'Arlo', type: 'dog'}),
+    updatePet(2, {type: 'cat'}, {name: 'Basil', type: 'cat'}),
+    updatePet(3, {type: 'seabeast'}, {name: 'Kochka', type: 'cat'})
+  ], function(err, result){
+    done(err);
+  });
+}
+
+async.series([listPets, cleanup, listPets, setup, listPets, update, listPets],
+  function(err, result){
+    console.log('all done');
+    mongoose.connection.close();
+  });
+

examples/node/json

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+HTTP/1.1 200 OK
+X-Powered-By: Express
+Content-Type: application/json; charset=utf-8
+Content-Length: 129
+ETag: W/"81-17478c4d"
+Date: Tue, 06 Jan 2015 18:33:10 GMT
+Connection: keep-alive
+
+[{"_id":1,"name":"","type":"dog","__v":0},{"_id":2,"name":"","type":"cat","__v":0},{"_id":3,"name":"","type":"seabeast","__v":0}]

examples/node/package.json

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+{
+  "name": "jsonpatch-to-mongodb-example-express",
+  "version": "0.0.0",
+  "description": "Using jsonpatch-to-mongodb with express",
+  "dependencies": {
+    "jiff": "~0.7.0",
+    "mongoose": "~3.8.21",
+    "async": "~0.9.0"
+  },
+  "scripts": {
+    "start": "node index.js"
+  },
+  "author": "Lucas Hrabovsky <[email protected]> (http://imlucas.com)",
+  "license": "MIT",
+  "homepage": "http://github.com/imlucas/jsonpatch-to-mongodb",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/imlucas/jsonpatch-to-mongodb.git"
+  }
+}