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Category: Notes

Notes taking about the different books I’ve read since the blog started. Usually related to specific technology but, sometimes I read about tech history.

Principle of Data Wrangling

Data Wrangling involves the process of cleaning and organizing data before any analysis takes place. It typically consumes between 50% and 80% of an analyst’s time. Factors to consider include time, granularity, scope, and structure. Importance: 1. Understanding the type of available data. 2. Choosing which data and level of detail to focus on. 3.
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Importance of a Database System

As should be clear from this paper, modern commercial database systems are grounded both in academic research and in the experiences of developing industrial-strength products for high-end customers. The task of writing and maintaining a high-performance, fully functional relational DBMS from scratch is an enormous investment in time and energy. Many of the lessons of
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4.6 Data Warehouses

DataWarehouses—large historical databases for decision-support that are loaded with new data on a periodic basis — have evolved to require specialized query processing support, and in the next section we survey some of the key features that they tend to require. This topic is relevant for two main reasons: 1. Data warehouses are a very
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Management Skills for developers

Leadership and direction Vision The business vision (“vision speaks of the future”) should be: To communicate the vision: Decision-making Understand what is at stake. And prioritize it. Delegate the rest to the rest of your team. There are three elements when making a decision in dealing with customer-related crises in systems: While you are making
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Learn to speak in public

First steps to public speaking When giving a presentation or starting to speak, it is sometimes common to inform the audience about things they are unaware of, which may cause stress. For example, saying, “Oops, I arrived late. I’m very sorry” or “I missed a few slides, but let’s proceed anyway.” This is your personal
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A short introduction to the art of programming 

Edsger W. Dijkstra – A short introduction to the art of programming  Link: E.W.Dijkstra Archive: A Short Introduction to the Art of Programming (EWD 316) 1. Preface  For those readers who identify the programmer’s competence with a thorough knowledge of the idiosyncrasies of one or more of the baroque tools into which modern programming languages
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The element of programming style

When the book saw the lights, programming wasn’t as important as today. But, some of the ideas around the style of writing are a worth to notice and to know it. For that reason reading the book written by Brian Kernighan and P. J. Plauger are a constant invitation to revisit the way we code,
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The elements of programming style: Epilogue

Epilogue There are many good books on languages, algorithms and numerical methods available to those who want to learn programming in greater depth. Our goal was not to teach languages or algorithms, but to teach you to program well.  Programmers have a strong tendency to underrate the importance of good style. Eternally optimistic, we all
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The elements of programming style: Documentation

Chapter 8: Documentation The best documentation for a computer program is a clean structure. It also helps if the code is well formatted, with good mnemonic identifiers and labels (if any are needed), and a smattering of enlightening comments. Flowcharts and program descriptions are of secondary importance; the only reliable documentation of a computer program
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The elements of programming style: Efficiency and instrumentation

Chapter 7: Efficiency and instrumentation Machines have become increasingly cheap compared to people; any discussion of computer efficiency that fails to take this into account is shortsighted. “Efficiency” involves the reduction of overall cost – not just machine time over the life of the program, but also time spent by the programmer and by the
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