DDevelopment & Design

TouK contest – some important rules

By entering TouK contest at 33rd Degree Conference you are accepting these simple conditions:

  1. The contest is open to all 33rd Degree Conference participians, except TouK people and their family members, of course (sorry, guys).
  2. To take part, you must collect two TouK feathers (in two different colours) and hack an application. The apllication is avaliable at http://reg.touk.pl. Then you must write down the solution (with your name and surname) on a sheet of paper received at our stand. and leave it to us to enter a prize draw. You must have TouK feathers in both colors with you.
  3. Only one entry is allowed per person.
  4. The prizes are 6 Raspberry Pi computers (2 per each conference day).
  5. All entries (except the winners’) will be rolled over into subsequent draws.
  6. All prize draws take place at our stand in following dates: ·Day 1, 13 of March – 16:30 ·Day 2, 14 of March – 15:50 ·Day 3, 15 of March – 12:50
  7. Only correct and complete solutions will be awarded.
  8. The winner have to be present during the prize draw. If not, we reserve the right to award the prize to an alternative winner, drawn in accordance with these terms and conditions.
  9. If you have any questions about how to enter or in connection with the contest, please ask at TouK’s stand.

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Thanks for visiting TouK stand at the 33rd Degree Conference

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Need to make a quick json fixes – JSONPath for rescue

From time to time I have a need to do some fixes in my json data. In a world of flat files I do this with grep/sed/awk tool chain. How to handle it for JSON? Searching for a solution I came across the JSONPath. It quite mature tool (from 2007) but I haven't hear about it so I decided to share my experience with others.

First of all you can try it without pain online: http://jsonpath.curiousconcept.com/. Full syntax is described at http://goessner.net/articles/JsonPath/



But also you can download python binding and run it from command line:
$ sudo apt-get install python-jsonpath-rw
$ sudo apt-get install python-setuptools
$ sudo easy_install -U jsonpath

After that you can use inside python or with simple cli wrapper:
#!/usr/bin/python
import sys, json, jsonpath

path = sys.argv[1]

result = jsonpath.jsonpath(json.load(sys.stdin), path)
print json.dumps(result, indent=2)

… you can use it in your shell e.g. for json:
{
"store": {
"book": [
      {
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
      },
      {
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
      },
      {
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
      },
      {
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
      }
    ],
"bicycle": {
"color": "red",
"price": 19.95
    }
  }
}

You can print only book nodes with price lower than 10 by:
$ jsonpath '$..book[?(@.price

Result:
[
  {
"category": "reference",
"price": 8.95,
"title": "Sayings of the Century",
"author": "Nigel Rees"
  },
  {
"category": "fiction",
"price": 8.99,
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"author": "Herman Melville"
  }
]

Have a nice JSON hacking!From time to time I have a need to do some fixes in my json data. In a world of flat files I do this with grep/sed/awk tool chain. How to handle it for JSON? Searching for a solution I came across the JSONPath. It quite mature tool (from 2007) but I haven't hear about it so I decided to share my experience with others.