Won't work for every, but this just saved me a bunch of time. I just had the problem with a CSV returning "TRUE or "FALSE" so I just added VALUE.to_s.downcase == "true" which will return the boolean true if the value is "TRUE" and false if the value is "FALSE", but will still work for the boolean true and false.
... and the uppercase is:
"Awesome String".upcase
=> "AWESOME STRING"
In combination with try
method, to support nil
value:
'string'.try(:upcase)
'string'.try(:capitalize)
'string'.try(:titleize)
The Rails Active Support gem provides upcase
, downcase
, swapcase
,capitalize
, etc. methods with internationalization support:
gem install activesupport
irb -ractive_support/core_ext/string
"STRING ÁÂÃÀÇÉÊÍÓÔÕÚ".mb_chars.downcase.to_s
=> "string áâãàçéêíóôõú"
"string áâãàçéêíóôõú".mb_chars.upcase.to_s
=> "STRING ÁÂÃÀÇÉÊÍÓÔÕÚ"
Like @endeR mentioned, if internationalization is a concern, the unicode_utils gem is more than adequate.
$ gem install unicode_utils
$ irb
> require 'unicode_utils'
=> true
> UnicodeUtils.downcase("FEN BILIMLERI", :tr)
=> "fen bilimleri"
String manipulations in Ruby 2.4 are now unicode-sensitive.
The .swapcase method transforms the uppercase latters in a string to lowercase and the lowercase letters to uppercase.
'TESTING'.swapcase #=> testing
'testing'.swapcase #=> TESTING
Since Ruby 2.4 there is a built in full Unicode case mapping. Source: https://stackoverflow.com/a/38016153/888294. See Ruby 2.4.0 documentation for details: https://ruby-doc.org/core-2.4.0/String.html#method-i-downcase
The ruby downcase
method returns a string with its uppercase letters replaced by lowercase letters.
"string".downcase
https://ruby-doc.org/core-2.1.0/String.html#method-i-downcase
You can find strings method like "strings".methods
You can define string as upcase
, downcase
, titleize
.
For Example,
"hii".downcase
"hii".titleize
"hii".upcase
You can find out all the methods available on a String by opening irb and running:
"MyString".methods.sort
And for a list of the methods available for strings in particular:
"MyString".own_methods.sort
I use this to find out new and interesting things about objects which I might not otherwise have known existed.
Source: Stackoverflow.com