I Have tried many ways and googled but everywhere i getting same way out, use json gem to parse a JSON file.
JSON.parse(string)
And couple of links are also using same stackoverflow Link
I wanted to achieve it by pure Ruby code without using any gem or rails help.
JSON is in the stdlib, so using JSON.parse is pure ruby.
require "json"
json_from_file = File.read("myfile.json")
hash = JSON.parse(json_from_file)
or just JSON.parse("{}")
If you're looking to write your own JSON parser (good luck), but just keep in mind that it's just a string when read from a file. So, start by reading it in from your file
File.open("myfile.json") do |f|
str = f.gets
# start parsing
end
At this point you'll need to tokenize what you read, and start picking apart each bit. Read up on the json spec.
require "json" and then JSON.parse(json_string).
JSON is part of the core Ruby library (as of 1.9.3 I believe). You just have to require it in your ruby application/file
require 'json'
## Then you can use JSON
JSON.parse("{}")
