¿Cómo se escriben con mayúscula cada palabra en Ruby?

How do you capitalize every word in Ruby?

Ruby’s string class offers a few methods to change the case of a string.

1. Upcase. Upcase is used to capitalize every letter of a string.
2. Downcase. Downcase is used to make every letter in a string lowercase.
3. Capitalize. Another method on the string class is capitalize.
4. Titleize. Titleize capitalizes every word in a string.

Ruby offers several functions to modify the capitalization format of a string. “upcase” converts all letters of a given string to capital letters (e.g. “HeLlO”. upcase #=> “HELLO”), “capitalize” capitalizes only the first letter of the string (not each word), (e.g. “HELlO Test”. capitalize #=> “Hello test”).

titleize is meant for creating pretty output. It is not used in the Rails internals. The trailing ‘_id’,’Id’.. can be kept and capitalized by setting the optional parameter keep_id_suffix to true.

Ruby has a few methods for changing the case of strings. To convert to lowercase, use downcase : “hello James!”. downcase #=> “hello james!”

Constantize is a String method that “tries to find a declared constant with the name specified in the string”. It is not seen widely in Ruby on Rails as it has a reputation as being insecure. We will use it to convert strings to module names that we can then call a method on.

Rails’s titleize will convert things like dashes and underscores into spaces and can produce other unexpected results, especially with case-sensitive situations as pointed out by @JamesMcMahon: To deal with this edge case you could clean your string with #downcase first before running #titleize.

Given the string, the task is to capitalise the first and last character of each word in a string. Run a loop from the first letter to the last letter. Check if the character is a small letter. If yes, then Capitalise the character of the string. Below is the implementation of the above approach. // and last character of each word in a string.

– Niels Abildgaard Aug 30 ’14 at 13:11 First, you don’t declare the type in Ruby, so you don’t need the first string. To replace a word in string, you do: sentence.gsub (/match/, “replacement”). Not the answer you’re looking for? Browse other questions tagged ruby ruby-on-rails-3 or ask your own question.

1 Create a character array of the String 2 Run a loop from the first letter to the last letter. 3 Check if the character is the starting or end of the word 4 Check if the character is a small letter. 5 If yes, then Capitalise the character of the string.