How Can I Efficiently Print Comma-Separated Lists in C ?

Printing Lists with Comma Separation in C

Despite being proficient in other languages, the task of printing a list of elements separated by commas can be daunting in C . This article provides a comprehensive solution to this issue.

The presented code snippet involves iterating through a set of strings while appending a comma to each element. However, the desired functionality requires the removal of the trailing comma. After experimenting with various approaches, an elegant solution emerges.

Infix Iteration with Delimiter:

An infix iterator, a specialized type of iterator, seamlessly incorporates a delimiter between elements. This technique ensures that the first element is printed without a preceding delimiter, while subsequent elements are separated as desired.

Integrating an infix iterator into your code is straightforward:

#include "infix_iterator.h"

// ...
std::copy(keywords.begin(), keywords.end(), infix_iterator(out, ","));

This approach leverages the functionality of the infix iterator to handle the comma insertion, eliminating the need for manual manipulation of strings or additional conditional checks. By incorporating this technique, the desired output of a comma-separated list can be achieved in C with both precision and efficiency.

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