Function Name: switchCase % Inputs (2): - (char) a string containg a word or phr

Question

Function Name: switchCase
% Inputs (2): - (char) a string containg a word or phrase
%              - (char) a string determining how to modify the previous
%                 input
% Outputs (1): - (char) the modified string
%
% Function Description:
%   Write a function called "switchCase" that takes in a string containing
%   a word or phrase and another string containing directions, and outputs
%   the modified word or phrase based on the directions. There can be 4
%   different ways of modifying the string:
%
%           - 'Title Case' -> Capitalizes the first letter of every word.
%                             Everything else is lowercase.
%           - 'Camel Case' -> Capitalizes the first letter of every word
%                             EXCEPT the first one. Everything else is
%                             lowercase. All the spaces are removed.
%           - 'Da Vinci'   -> Reverses the string.
%           - '1337'       -> Changes each of the following letters into
%                             it's respective number replacement.
%                             '1' should replace 'l'
%                             '2' should replace 'z'
%                             '3' should replace 'e'
%                             '4' should replace 'a'
%                             '5' should replace 's'
%                             '6' should replace 'g'
%                             '7' should replace 't'
%                             '8' should replace 'b'
%                             '9' should replace 'j'
%                             '0' should replace 'o'
%                             Each of the replacements should work for
%                             capitalized letters as well.
%
%
% Test Cases:
%   new_string = switchCase('there AND back again', 'Title Case');
%       new_string => 'There And Back Again'
%
%   new_string = switchCase('What is better than UPPER or lower case?',...
%   'Camel Case');
%       new_string => 'whatIsBetterThanUpperOrLowerCase?'
%
%   new_string = switchCase('Hannah!', 'Da Vinci');
%       new string => '!hannaH'
%
%   new_string = switchCase('Now I can talk like a REAL hacker!', '1337');
%       new_string => 'N0w I c4n 741k 1ik3 4 R341 h4ck3r!'

Explanation / Answer

function newstr = switchCase(str,c)

switch(c)

case 'Title Case'

str= lower(str);

newstr = regexprep(str,'(<[a-z])','${upper($1)}');

case 'Camel Case'

str= lower(str);

str = regexprep(str,'(<[a-z])','${upper($1)}');

str = regexprep(str,'^s*.','${lower($0)}');

newstr = regexprep(str,'s*','');

case 'Da Vinci'

newstr=fliplr(str);

case '1337'

str=regexprep(str,'l|L','1')

str=regexprep(str,'a|A','4')

str=regexprep(str,'z|Z','2')

str=regexprep(str,'e|E','3')

str=regexprep(str,'s|S','5')

str=regexprep(str,'g|G','6')

str=regexprep(str,'t|T','7')

str=regexprep(str,'b|B','8')

str=regexprep(str,'j|J','9')

newstr=regexprep(str,'o|O','0')

end

end

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