Let's assume you are considering using Cassandra for logs storage or in general, for time series storage. You are well prepared - asked google extensively. Yet, there is a trap waiting to kill your cluster in few weeks after lunch.
http://dynamicallyinvokable.blogspot.com/ | użytkownik
Dynamic Programming series continuation. Something harder this time: Given a set of positive integers, divide it into two sets such that the absolute difference between their sums is minimum. Solution in 5 easy steps!
Dynamic Programming is considered as one of the hardest methods to master, with few examples on the internet. Let's contribute a little with this post series. Today I will cover the first problem - text justification. Credits: MIT lectures.
Recently I've designed a mechanism to notify external systems (with which we cooperate) about changes in our system. This, obviously, can be done in multiple ways. Let's look at some considerations on a high level, some questions and how that affects our requirements.
Warning: this post won't be about "boring" or "typical" algorithms from Computer Science which we all have learned on studies (like quick sort, merge sort, xxx sort, A*, FFT). Instead, this will be about other little-known, especially USEFUL algorithms, which people working as professional developers should know or heard of. Little-known. ID generation problems are usually overlooked. Database ID's I mean. Ask someone to name ID "types". Well, GUID, newsequentialid...
This user story is quite simple: there is a guy (me) who likes Star Wars. This guy wants to buy the best tickets available in an IMAX Cinema. The premiere was not so long ago, so a day after the showtimes are updated, the best seats are booked. This guy (also me) is quite lazy, so he doesn't like to check the showtimes manually. Hm... let's do it like pro developers using cutting-edge technologies! How the booking system works? There is this whole UI for selecting seats and so on, however there is ...
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