Find Maximum Subarrays using Java
The problem Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. Example: Input:… Read More »Find Maximum Subarrays using Java
Finding Number Complements using Java
The problem Given a positive integer num, output its complement number. The complement strategy is to flip the bits of its binary representation. Example 1: Input: num =… Read More »Finding Number Complements using Java
Forensic Analysis on Linux (Unix)
Operating Systems come in a few competing choices, of which the major players are Apple’s MacOS, Microsoft’s Windows and then the various flavours of Linux,… Read More »Forensic Analysis on Linux (Unix)
Self Dividing Numbers using Python
Introduction A self-dividing number is a number that is divisible by every digit it contains. For example, 128 is a self-dividing number because 128 % 1 == 0, 128… Read More »Self Dividing Numbers using Python
RuntimeError: thread.__init__() not called (Python)
Today I got a really dumb error from Python. RuntimeError: thread.__init__() not called But luckily it’s really easy to fix! Below is the code before… Read More »RuntimeError: thread.__init__() not called (Python)
All About Distributed Databases
A database “is a structured collection of data. Card indices, printed catalogues of archaeological artefacts and telephone directories are all examples of databases”. We are… Read More »All About Distributed Databases
Network systems security risks
Networking has played a vital part in the transfer of information as well as the accessibility of information that was never available to previous generations… Read More »Network systems security risks
Communications and The Software Development Process
Software Engineering or the Software Development Process is broken down into the following phases. Requirements Design Implementation Verification Maintenance Communication can often breakdown in the… Read More »Communications and The Software Development Process
Get the total size of all the files in a directory
It’s amazing how many times I’ve need to find out the total size of all the files in a directory on one of our servers.… Read More »Get the total size of all the files in a directory
Structured and Object-Oriented Programming
Software development has really come a long way over the past few decades. Programming used to always be about doing things in a very procedural… Read More »Structured and Object-Oriented Programming
Moving a MySQL Database without downtime
At Statvoo we found ourselves in the position where we needed to move our master MySQL database without ANY downtime and for anyone who’s tried… Read More »Moving a MySQL Database without downtime
How to use Google Analytics in AngularJS
It seems to be quite a popular question with not as many answers to hold the weight. Google Analytics has always been more of a… Read More »How to use Google Analytics in AngularJS
Converting from Legacy to Client-Server or Distributed Systems
What is a legacy system? A legacy system is a computing system that has been around for a very long period of time, tends to… Read More »Converting from Legacy to Client-Server or Distributed Systems
Conceptual Architectural Views, with a focus on the Development View
What is Conceptual Architectural Views? Architectural views are abstractions, or simplifications, of the entire design, in which important characteristics are made more visible by leaving… Read More »Conceptual Architectural Views, with a focus on the Development View
Assessing Reusable Parts in a Software Architecture
During the Software Development Life Cycle (SDLC) the development team will come to realise that parts of any application have already been created before and… Read More »Assessing Reusable Parts in a Software Architecture
An Introduction to 2-Tier and 3-Tier Client-Server Systems
All software systems can be grouped in either a 2-tier or a 3-tier formation. The former is essentially where all clients contain application and business… Read More »An Introduction to 2-Tier and 3-Tier Client-Server Systems
Remove the Outermost Parentheses using Python
The Question A valid parentheses string is either empty (“”), “(” + A + “)”, or A + B, where A and B are valid parentheses strings, and + represents string concatenation. For example, “”, “()”, “(())()”,… Read More »Remove the Outermost Parentheses using Python
The Pros and Cons of Agile in Software Development
What is Agile in Software Engineering? Agile approaches help teams respond to unpredictability through incremental, iterative work cadences and empirical feedback. (AgileMethodology.org, 2008) Advantages of… Read More »The Pros and Cons of Agile in Software Development
Contemporary and beneficial uses of Big-Data Systems
Big data is a term applied to datasets whose size or type is beyond the ability of traditional relational databases to capture, manage, and process… Read More »Contemporary and beneficial uses of Big-Data Systems
Distributed Database Systems Observations
Traditional database systems were a centralised powerful database server that housed all operations pertaining to the database. There are countless reasons that this is unsustainable… Read More »Distributed Database Systems Observations
Functions of an Operating System
I am in a bit of an unusual situation where “I use” a combination of three different laptops, which each run different platforms. Namely; MacOS… Read More »Functions of an Operating System
ORDER BY RAND() – Faster Alternative
MySQL’s ORDER BY RAND() function can be so useful for returning random items from a table, in fact, we have used it a million times… Read More »ORDER BY RAND() – Faster Alternative
Top-down vs Bottom-up Database Design
There are essentially two different approaches one can take when designing databases; these, from a high-level analytic point of view, narrow down to what is… Read More »Top-down vs Bottom-up Database Design
How to keep your web server or blog up when you get a traffic spike
So you’re about to be featured on some very high ranking website. You’re worried that when all the visitors come rushing towards you, your web… Read More »How to keep your web server or blog up when you get a traffic spike
How to get the UTC Timestamp in Python
All dates in your server applications should be stored in the UTC timezone. This is because you always want to store time without the offset… Read More »How to get the UTC Timestamp in Python