Case based critical thinking Case 13-5 William is exploring the syntax of regular expressions. He learns that in the regular expression language, a word refers to any string of symbols consisting solely of word characters. He also learns that word boundaries are indicated by the \b symbol. He wants to use a pattern that matches any word that starts with the characters "great" such as "greater", "greatness", or "greatest" Which of the following patterns should William use?
A) //bgreat/
B) /\bgreat/
C) /bgreat/
D) /b\great/

Question

Quizplus · Accepted Answer

The \b symbol indicates a word boundary, so using /\bgreat/ will match any word that starts with "great". Option A, //bgreat/, will match "bgreat" instead of "great" at the beginning of a word. Option C, /bgreat/, will match "bgreat" within a word instead of just at the beginning. Option D, /b\great/, will not work as the \b needs to be before the "great" to indicate a word boundary.

Case Based Critical Thinking Case 13-5 William Is Exploring the Syntax