Pertamax

_posts/2013-12-23-ruby-json.markdown

@@ -0,0 +1,41 @@
+---
+layout: post
+title:  "Parsing JSON with Ruby"
+date:   2013-12-23 00:18:23 
+categories: ruby
+---
+Parsing JSON with Ruby is actually extremely easy. All you have to do is have the json gem installed (`gem install json`) and call the `JSON.parse` method on the JSON data to convert it to ruby hashes. If you look at this small program here, you can see how I have implemented parsing JSON in Ruby.
+
+{% highlight ruby %}
+#!/usr/bin/env ruby
+
+require 'json'
+require 'net/http'
+require 'libnotify'
+
+def parsejson
+    file = "http://api.openweathermap.org/data/2.5/find?q=London&mode=json"
+    response = Net::HTTP.get_response(URI.parse(file))
+    weatherjson = response.body
+    actual = JSON.parse(weatherjson)
+
+    # check for errors
+    if actual.has_key? 'Error'
+        raise "error with the url"
+    end
+
+    results = []
+
+    actual["list"].each do |listitem|
+        weather = listitem["weather"]
+        weather.each do |weath|
+            results.push(weath["description"])
+        end
+        main = listitem["main"]
+        temp = main["temp"] - 273.15
+        results.push ("%.2f" % temp)
+    end
+
+    return results
+end
+{% endhighlight %}