#Nodejs json compare how to#
#Nodejs json compare code#
#Nodejs json compare download#

You can also download your JSON Data as a JSON file. You can also beautify JSON or formate JSON. Using jQuery jQuery.isEmptyObject(obj) 5. JSON Compare has the functionality to find different with JSON APIs, JSON Files and JSON Data. If the length of the array is 0, then we know that the object is empty. Var res4 = JSON.stringify(large) = JSON.stringify(large2) Ĭonsole.log('deep comparison res: '+res+' took: '+ (t3.getTime() - t2.getTime())) Ĭonsole.log('hash comparison res: '+res2+' took: '+ (t4.getTime() - t3.getTime())) Ĭonsole.log('assert compare res: true took: '+ (t5.getTime() - t4.getTime())) Ĭonsole.log('string compare res: '+res4+' took: '+ (t6.getTime() - t5.Object.keys will return an Array, which contains the property names of the object. Var res2 = (hash = crypto.createHash('md5').update(JSON.stringify(large2)).digest('hex')) Var hash = crypto.createHash('md5').update(JSON.stringify(large)).digest('hex') Var large2 = JSON.parse(JSON.stringify(large)) Here is the source code: var _ = require('underscore') I've done some benchmarking of the various techniques, with underscore coming out on top: > node nodeCompare.jsĭeep comparison res: true took: 418 (underscore)

In my concrete case the second way is 10 times more efficient then the first way. In other case, be aware of using this method. I didn't search in the V8 documentation, but I think we can rely on the fields creation order.

#Nodejs json compare code#

In my program the object fields are always created in the same order, so the code above works. Converting JSON to JavaScript Object You can convert JSON data to a JavaScript object using the built-in JSON.parse () function. However, if you compare strings made of objects, this will matter much. JavaScript Objects VS JSON Though the syntax of JSON is similar to the JavaScript object, JSON is different from JavaScript objects. Very important note! As far as I know, neither JavaScript nor JSON don't matter the order of the object fields. JSON.stringify(data1) = JSON.stringify(data2) Then you can visualize the differences between the. The format is now so common and useful that many Java developers use the JSON. I've found JSON.stringify is extremely fast in node.js. You can also directly compare two JSON files by specifying their urls in the GET parameters url1 and url2. Many Web services and databases return data in JSON, a natural part of JavaScript. Second way: Efficient but has one restriction. 2 solutions Top Rated Most Recent Solution 1 Firstly, what you have is not valid JSON. Please note that generic method iterates the objects three times (there are three for. The obvious way would be to parse each string to an object and then compare the fields. You can modify a generic method like this so it does not waste time looking for functions and undefined. Please feel free to edit my post.įirst way: Unefficient but reliable.

#Nodejs json compare how to#

The main thing I'm missing is that I don't know how to explain my question correctly. I'm also sure lots of skillful programmers have answered this question before me. The prototype of these data will be Object.

I want to say I don't want to compare JavaScript objects in the most general case (with complex prototypes, circular links and all this stuff). I'm 100% sure there will be no functions, Date, null or undefined, etc. json-schema-benchmark - an independent benchmark for Node.js JSON-schema. All I wanna do is to compare the equality of two pieces of JSON-standardized data like this: Benchmarks that compare at least two implementations supporting draft-06+ may. Friends! I'm really sorry if I don't understand something, or explain question in wrong terms.