DDevelopment & Design

O Javie jutro nad Wisłą

Jeśli jeszcze nie macie planów na sobotę, może zajrzycie na nadwiślański j.Piknik? O 11:00 merytoryczną część imprezy rozpocznie Jakub Nabrdalik z TouK.

Jeśli jeszcze nie macie planów na sobotę, może zajrzycie na nadwiślański j.Piknik? O 11:00 merytoryczną część imprezy rozpocznie Jakub Nabrdalik z TouK.

Apocomito? Czyli jakie problemy rozwiązały mi DDD, CQRS, NoSQL, TDD i inni, a gdzie się kompletnie nie nadają – to temat wystąpienia Jakuba. Z pełną agendą imprezy można zapoznać się na stronie pikniku.  Oprócz uczty dla umysłu, nie zabraknie też strawy dla ciała.

I wykłady, i wspólne grillowanie odbędzie się w Temat Rzeka na plaży obok Mostu Poniatowskiego. Nie bójcie się deszczu, organizatorzy, czyli  Grupa Allegro i Fundacja PROIDEA, podobno zadbali o namioty:)

Wstęp na imprezę jest wolny.

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micro-burn has Trello integration

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DDevelopment & Design

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.