Capitalize only first character of string and leave others alone? (Rails)

Solution 1:

This should do it:

title = "test test"     
title[0] = title[0].capitalize
puts title # "Test test"

Solution 2:

Titleize will capitalise every word. This line feels hefty, but will guarantee that the only letter changed is the first one.

new_string = string.slice(0,1).capitalize + string.slice(1..-1)

Update:

irb(main):001:0> string = "i'm from New York..."
=> "i'm from New York..."
irb(main):002:0> new_string = string.slice(0,1).capitalize + string.slice(1..-1)
=> "I'm from New York..."

Solution 3:

You can use humanize. If you don't need underscores or other capitals in your text lines.

Input:

"i'm from New_York...".humanize

Output:

"I'm from new york..."

Solution 4:

str = "this is a Test"
str.sub(/^./, &:upcase)
# => "This is a Test"

Solution 5:

As of Rails 5.0.0.beta4 you can use the new String#upcase_firstmethod or ActiveSupport::Inflector#upcase_first to do it. Check this blog post for more info.

"i'm from New York...".upcase_first

Will output:

"I'm from New York..."