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Add bits before last alphabet of every word

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Balkar Singh
Balkar Singh 2020-4-11
评论： Balkar Singh 2020-4-17
How to add watermarks bit before the last alphabet of every word of a string.
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采纳的回答

Image Analyst
Image Analyst 2020-4-12
Try this:
str = 'MATLAB is a super awesome program';
words = strsplit(str)
for k = 1 : length(words)
thisString = words{k};
if length(thisString) >= 2
words{k} = sprintf('%s%c%c', thisString(1:end-1), char(hex2dec('2020D')), thisString(end));
end
end
% Reconstruct into a single string
words
str2 = [];
for k = 1 : length(words)
thisString = words{k};
str2 = sprintf('%s %s', str2, thisString);
end
str2
You'll see in the command window:
words =
1×6 cell array
{'MATLAB'} {'is'} {'a'} {'super'} {'awesome'} {'program'}
words =
1×6 cell array
{'MATLAB'} {'is'} {'a'} {'super'} {'awesome'} {'program'}
str2 =
' MATLAB is a super awesome program'
except that the FFFF in the boxes don't show up in MATLAB - they're just little empty boxes.
  2 个评论
Image Analyst
Image Analyst 2020-4-12
Sorry, the second words is not showing up in the web browser the same way it does in the MATLAB command window. In the MATLAB command window, you can see that there is a little box (representing the special non-printable character) just before the last letter of every word, and in the browse (before I submitted it) the little boxes has 4 F's in them.

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更多回答（2 个）

Ameer Hamza
Ameer Hamza 2020-4-12
编辑：Ameer Hamza 2020-4-12
This example show how to add the Unicode U+202D before the last character of every word. It also ignores full stops (.) and comma (,) while making a replacement. Since this Unicode character is invisible and has no effect on visible effect on the left to right characters, you can see the replacement is being made by comparing the length of the strings.
str = 'A quick brown fox, jumps over the lazy dog.';
l1 = numel(str);
new_str = regexprep(str, '([A-Za-z][\s\.,])', [char(hex2dec('202D')) '$1']);
l2 = numel(new_str);
>> l1
l1 =
43
>> l2
l2 =
52
You can also see that the replacement are being made by adding a dummy character (say a) after U+202D.
str = 'A quick brown fox, jumps over the lazy dog.';
new_str = regexprep(str, '([A-Za-z][\s\.,])', [char(hex2dec('202D')) 'a$1']);
new_str =
'aA quicak browan foax, jumpas ovear thae lazay doag.'
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Ameer Hamza
Ameer Hamza 2020-4-14
Balkar, Stephen's answer covers that case. Please check it.

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Stephen23
Stephen23 2020-4-12
Simpler:
>> str = 'A quick brown fox, jumps over the lazy dog';
>> out = regexprep(str,'(\w)\>','\x202D$1')
out =
A quick brown fox, jumps over the lazy dog
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Balkar Singh
Balkar Singh 2020-4-17
No sir this is not my homework. I am at the learning stage.

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