Groupings are used when you want to match certain patterns, but only want to extract part of the information.
We can later reference these segments that we captured later on.
To specify a grouping, use parantheses (
You can also nest capture parentheses. The captured groups are in the order in which they are defined.
To reference the captured substrings, use a backslash (
Algorithms are the procedures that software programs use to manipulate data structures. Besides clear and simple example programs, the author includes a workshop as a small demonstration program executable on a Web browser. The programs demonstrate in graphical form what data structures look like and how they operate.$ Check price
This fourth edition of Algorithms is the leading textbook on algorithms today and is widely used in universities worldwide. This book surveys the most important computer algorithms currently in use and provides a full treatment of data structures and algorithms for sorting, searching, graph processing, and string processing.$ Check price