Indexes speed up searches for data. While they are very effective at doing this, they also represent an extra operation when inserting, updating and deleting data, since every table update also requires an update of the index. Sequential Access To … Continued
Cohesion and coupling are architectural concerns in the design of well-formed objects. Well-formed objects are cohesive and loosely coupled. Poor cohesion and tight coupling are design flaws, and are reasons to refactor a class architecture. (For an overview of object-oriented … Continued
Objects In general terms, objects are units of reusable software functionality. Different objects can be assembled together to become parts of software applications. Objects expose their functionality through properties and methods. Properties define, store and expose attributes, and methods define … Continued
Inheritance Inheritance is a core concept in object-oriented design. For an overview of object-oriented design, have a look at Object-Oriented Design Basics: Objects, Classes and Inheritance. Inheritance is the ability of one class (a “subclass”) to use the state and … Continued
What Is Recursion? A recursive function is a function that invokes itself. This process of self-invoking is called recursion. So that a recursive function will not invoke itself infinitely, it must include an exit condition. This bit of code demonstrates … Continued
Synchronous vs. Asynchronous Code By default, code in JavaScript executes synchronously, meaning one line after the next. This means that a line of code can’t execute until all of the previous lines of code in its lexical scope have finished … Continued
Photo By: © iStockphoto/Serg_Velusceac A few years ago, I began developing this site to showcase a portfolio of my skills. Web design was not one of the skills I intended to showcase. I was fluent in SQL and could get … Continued