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@mohammedri
Last active August 21, 2018 19:39
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[Ruby] Convert from snake_case to camel_case
# Using gsub (least performant)
"test_string".capitalize.gsub(/_(\w)/){$1.upcase} # => TestString
# Using split & map with capitalize
"test_string".split('_').map(&:capitalize).join
# Using split & map (most performant)
"test_string".split('_').map{|e| e.capitalize}.join
# Ruby string implementation
http://rubydoc.info/gems/extlib/0.9.15/String#camel_case-instance_method
def camel_case
return self if self !~ /_/ && self =~ /[A-Z]+.*/
split('_').map{|e| e.capitalize}.join
end
# Extra
"hello_world".split('_').collect(&:capitalize).join #=> "HelloWorld"
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