Tag Archives: code
Cubic Spline Interpolation
Cubic spline interpolation is a simple way to obtain a smooth curve from a set of discrete points (knots). It has both C1 (first derivative) and C2 (second derivative) continuity, enabling it to produce a continuous piecewise function given a set of data points. From the algorithm detailed here I have implemented a clamped cubic spline class in C++. It is templated on the type of X and Y, allowing for use of scalar or vector types. It requires only … Continue reading
NSCopying and Mutability
In the Cocoa frameworks, it is common to find mutable and immutable versions of classes that store data, such as strings, dictionaries, and arrays. Most of these classes also implement the NSCopying informal protocol, and those with mutable varients implement the NSMutableCopying protocol. These protocols specify methods for obtaining immutable and mutable copies of an object. These copying methods should be implemented such that the copy can return an instance of a subclass, to allow for subclasses to copy their … Continue reading
Readable If Statements
To kick of the Coding Yups and Nopes section, I’ll start with something simple. There are a set of things to do, and a set of things to avoid. For each thing, there are one or more reasons justifying its classification. These reasons are ordered by descending importance and increasing subjectivity. – Nope: if (condition) doWork(); else doOtherWork(); If you’re stepping through with a debugger (I used gdb), it is difficult to tell when stepping over the line if the … Continue reading