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This project examines the predictive capabilities of the ARIMA model for time series analysis. To explore the capabilities of the statsmodels library, the Python programming language will be used with jupyter notebook being the runtime environment. Along with the prediction analysis, there will be a demonstration of data retrieval using the yahoo web api, time series transformation, manual and automatic stationarity checks, benchmarking the model versus a naive benchmark, multiple days prediction and multiple symbol prediction mean error checks....

Today Greece is again all over the news because of the Eurogroup and the new deal the Greek governemnt tries to achieve through its representatives. Why not check out which website has a title about Greece on it’s front page as fast as possible. Python 3.2 introduced concurrent futures which is actually a simple interface for asynchronous parallel tasks. Lets check it out on a very simple example. We will crawl 5 web sites, some of them will not contain English characters and I selected them just to check the difference....

After a year working with elasticsearch I decided to write about it mainly as a self reminder of what I liked what I did not and the choices I made in the process. Everything is a personal opinion and someone might choose to disagree but it’s cool :) . All this experience was a part of creating a search implementation for an e-commerce application which in the process along with a mysql full text search was contributed back to sylius, the “base” for our solution....

Recently I came upon a problem where the passwords of the current user base are hashed in md5 and we had to migrate them to sha. Checking around the web how others have solved this didn’t help a lot. Asking your user to login to change the password or double encode the md5 one didn’t sound like clever solutions. The main authentication process in symfony is happening in DaoAuthenticationProvider. {% highlight php startinline=true %} if (!...

Lately I find myself in a position where I’m not sure what I want to learn next and what will be usefull for me career wise. This weekend I wanted to check out the play framework. A scala framework which supports coding in both scala and java. I used to work with java for many year but I wanted something else since I wasn’t enjoying the ecosystem. I will not get into details on that, java is great as language but there are a lot of applications out there which is nightmare to work with…...