October 2006
Intermediate to advanced
888 pages
16h 55m
English
Content preview from The Ruby Way: Solutions and Techniques in Ruby Programming, Second Edition
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2.28. Counting Characters in Strings
The count method counts the number of occurrences of any of a set of specified characters:
s1 = "abracadabra"
a = s1.count("c") # 1
b = s1.count("bdr") # 5The string parameter is like a simple regular expression. If it starts with a caret, the list is negated:
c = s1.count("^a") # 6
d = s1.count("^bdr") # 6A hyphen indicates a range of characters:
e = s1.count("a-d") # 9
f = s1.count("^a-d") # 2Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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