%% Normalize to Unicode Canonical Decomposition Form
% Strings that look identical can have different underlying representations. The  Unicode canonical decomposition form (NFD) ensures that equivalent  strings have a unique binary representation. This is useful when strings contain accented characters which can have several ways to represent  them.
% Consider the string "jalapeño" which contains 8 letters.

str = "jalapeño";
strlength(str)

% Normalize the string using the textanalytics.unicode.nfd function. Depending on your system, the output string may appear to be identical to the input string.

newStr = textanalytics.unicode.nfd(str)

% View the number of code points in the new string.

strlength(newStr)

% Notice that the normalized representation includes one extra code point. In this case, the function splits the accented letter "ñ" into two separate code points. Extract the 7th and 8th code points in  the normalized string. Depending on your system, the output may appear  to be a single character.

extractBetween(newStr,7,8)

% Check that the strings str and newStr are equal using the == operator. The operator returns false because the strings have different underlying representations.

tf = str == newStr

% Copyright 2021 The MathWorks, Inc.