I have spent a few hours reading about JSON online and have read a JSON for beginners text book. However, I still can not find out how to start using JSON to store data. Is there a JSON download or interface that is used or do you store JSON files in other languages like python?
I understand JSON is a file format, but where do I write and store JSON files?
My question is different than the suggested duplicate because it is more narrow. My question specifically asks "where do I write a JSON file?", as opposed to "how do I use JSON?"
DISCLAIMER I'm brand new to coding and don't have a teacher to consult to ask questions. I am asking this question because I am genuinely trying to learn and this information is not available online, nor in the textbook that I purchased.
Thank you in advance for your help!
JSON is a file format for storing and passing data between, you can create a JSON file in any text editor, it should follow the JSON format that's it , you can validate the format of your JSON using online validators, I usually use https://jsonlint.com/, JSON is a standard which is supported by almost every programming language, you have API in every language to support it.
you can find examples of JSON data here http://json.org/example.html
just copy them and store them in a file with extension ".json", you can read them from your program by specifying the path where the file is present on the file system.
Related
so i want to get the value from one oof my fields in my thingspeak, i'm able to extract data from my channels but i want to get only one specific field
i read the documentation and the api link that looks like this
https://api.thingspeak.com/channels/<channel_id>/feeds.json?results=1
and when i opened the link it showed this
{"channel":{"id":1688112,"name":"ESP8266 - Web Controlled LED","latitude":"0.0","longitude":"0.0","field1":"Command","field2":"Red LED","field3":"Green LED","field4":"Blue Led","created_at":"2022-03-29T00:36:06Z","updated_at":"2022-04-06T03:12:36Z","last_entry_id":443},"feeds":[{"created_at":"2022-04-10T07:06:01Z","entry_id":443,"field1":null,"field2":"0","field3":"0","field4":"0"}]}
so my question is how do i extract the data for example from my field2 data where "field2":"0"?
i want to use it for my project in my html where later it can do some functions in my content.
thanks!
It really depends on the program you use.
But usually you find a JSON library to be installed in your IDE.
With it you extract any field from the JSON file
I have game files in BSON. Wanted to convert it to JSON to find the value I wanted to change. Found this site: http://mcraiha.github.io/tools/BSONhexToJSON/bsonfiletojson.html, which is the tool to do that. But now I'm stuck with JSON file, and can't get it back to BSON. I couldn't find any online tools that can reverse that process.
So my question is - is there an easy way to convert JSON to BSON?
I went through previous posts on SO and some of the answers say that a JSON file is used to send data from server to client.
Well that seems to be okay but then we can create package.json, Apidoc.json, manifest.json which do not interact with the client and server
So can someone tell me what actually is a JSON file?
JSON stands for JavaScript Object Notation. It is used to describe a data structure in a simple format. It can be a plain text file, which may be used to pass data from the server to a client, but it could be equally used to hold and consume that data at the same layer e.g. you could have a configuration file at the client side which is read an interpreted by your application.
Note also that JSON does not need to be held in a file; you could create a string variable with JSON data in it and pass this from one method to another without ever storing it in a file.
The tag definition in Stack Overflow can be found here https://stackoverflow.com/tags/json/info and further information can be found here https://www.json.org/.
JSON is a file format, just like CSV. Just because CSV is used with Microsoft Excel, does not mean that is all it is used for (just like with JSON). Just because it is common to get info from a server in JSON format, does not mean that is all JSON is used for. Do some googling before asking a question like this on Stack Overflow.
Here is an intro to JSON. JSON Intro W3Schools
I want to convert JSON files to CSV in nifi. We can achieve this in Python and other programming languages and have multiple articles on it. I have multiple JSON files and each file has different schema(one specific file will have one schema only). I can see there are templates to convert CSV to JSON and other conversions. But I didn't see any template to convert JSON data to CSV. I have gone through the article https://community.hortonworks.com/articles/64069/converting-a-large-json-file-into-csv.html ,however here we are hard coding the schema. As I have multiple files and each file has different schema, I can't hardcode the schema. Any suggestions please.
Conversion between formats is typically done through ConvertRecord by plugging in the appropriate record reader and record writer, in this case a JSON reader and CSV writer.
To make use of the record processors you need to defined Avro schemas for your data and put them in a schema registry, NiFi provides a local one.
There are lots of examples and posts out there about the record stuff, this slide deck shows an example of CSV to JSON, but would be easy to reverse the situation for your scenario:
https://www.slideshare.net/BryanBende/apache-nifi-record-processing
This post has some other info:
https://bryanbende.com/development/2017/06/20/apache-nifi-records-and-schema-registries
I am trying to import data from past NFL games in the form of Play-by-play tables and am mostly working in R to collect the data and create a data set.
An example of the data I am after is on this page: http://www.nfl.com/gamecenter/2012020500/2011/POST22/giants#patriots#menu=gameinfo&tab=analyze&analyze=playbyplay
I know that NFL.com uses JSON and much of the necessary data are in JSON files attached to the site. My efforts at extracting data from these files using the JSON package in R have been pretty feeble. Any advice y'all have is appreciated.
Would I just be better off using PHP to farm the data?
I don't know if you have already succeeded loading the JSON files into R, but here is an example of that:
library(rjson)
json=fromJSON(file='http://www.nfl.com/liveupdate/game-center/2012020500/2012020500_gtd.json')
json$`2012020500`$home$stats
If you are having trouble finding the URL of the JSON file, use Firebug (an extension for Firefox) and you can see the webpage requesting the JSON file.
The JSON file, is, of course, huge and complicated. But it is complicated data. Whatever you are looking for should be in there. If you are just looking for a straight dump of the play-by-play text, then you can use this URL:
http://www.nfl.com/widget/gc/2011/tabs/cat-post-playbyplay?gameId=2012020500
I extracted all the data for one team for one season more-or-less manually. If you want data for a lot of games consider emailing the league and asking for the files you mentioned. They publish the data, so maybe they will give you the files. The NFL spokesman is Greg Aiello. I suspect you could find his email address with Google.
Sorry this is not a suggested programming solution. If this answer is not appropriate for the forum please delete it. It is my first posted answer.