Title: easy to write code based on the book's equations
Review: Lane et al start off with a quick review of the general case of DSP filters and the use of transfer functions to model them. This leads naturally into a bifurcation, yielding Finite Impulse Response and Infinite Impulse Response filters.The theory is presented in concise fashion. And with no problem sets in the chapters. Seems more like a summary of material you perhaps should have learnt in a more leisurely text. Example codes are given in C++. Short subroutines. There is very little need or usage of the object oriented nature of C++. If you need to code from the formulae in the book, the example codes can be used to get you started. But for most engineers, this may not even be necessary. A modicum of acquaintance with whatever language you write in should suffice.
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