Re-open String class and add .upcase method in Ruby...

How to prevent iterating over duplicate array elements?...

Combining a string with capitalized hex seems to erase the first string...

Why a dangerous method doesn't work with a character element of String in Ruby?...

Weird behavior of #upcase! in Ruby...

Hartl Rails Tutorial: upcase-ing email address in user_test...

.upcase! makes if statement fail to work properly...

Loop won't break and string won't capitalize properly?...

Ruby string upcase! method - uppercasechar.upcase! returns nil - bug or feature?...

str_replace doesn't work with array arguments on PHP...