Software Development in Practice by Bernie Fishpool

Author:Bernie Fishpool
Language: eng
Format: epub
Publisher: BCS Learning & Development Limited
Published: 2020-05-15T00:00:00+00:00

Refactoring

It is not a trade industry secret to say that code is often developed at a reasonably frantic rate. This leads to technical shortcuts, a lack of appropriate (i.e. rigorous) testing and, to be honest, less-than-ideal additions to a production codebase. The usual suspects include:

vulnerable code with insufficient data or data type checking;

overlong (or overcomplicated) functions;

functions which break the SRP (single responsibility principle): performing more than one core task;

badly designed classes, particularly ones that have grown too large and unwieldy;

orphan functions which possibly should belong elsewhere;

unnecessary code duplication: WET vs DRY;

short-term ‘hacks’ which are used to patch a codebase’s behaviour temporarily;

obsolete and/or potentially misleading comments which no longer reflect the code they accompany;

over-engineered code which attempts to predict future need (more on this later) and becomes needlessly layered and overcomplicated;

badly named identifiers – too short, too long or simply do not meet team standards;

‘God’ lines, where a single complex line of code possibly defies easy maintenance or breaks coding standards (e.g. recommended maximum line length).

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