start_with?(*args) public

Returns true if str starts with one of the prefixes given. Each of the prefixes should be a String or a Regexp.

"hello".start_with?("hell")               #=> true
"hello".start_with?(/H/i)                 #=> true

# returns true if one of the prefixes matches.
"hello".start_with?("heaven", "hell")     #=> true
"hello".start_with?("heaven", "paradise") #=> false
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May 3, 2012
0 thanks

Starts with a Capital Letter

(or any regular expression you’d like)

'Abracadabra'[0..0] =~ /[A-Z]/       # => true
May 17, 2012
0 thanks

Starts with capital letter alternative

Just adding an anchor to the regular expression seems simpler (and was faster in my benchmarks, not that that matters much):

'Abracadabra' =~ /^[A-Z]/