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How make a function to change the first letter of one English sentence to upper

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Posted by Lxhd   (27 posts)  [Biography] bio
Date Tue 02 Feb 2016 03:05 AM (UTC)
Message
I want to make a function by Lua to change the firt letter of one setence or word to upper case,
for examplle:
"i like you" to "I like you"
"woman" to "Woman"
please kindly give me your kind suggestion, thanks a lot.
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Posted by Nick Gammon   Australia  (21,322 posts)  [Biography] bio   Forum Administrator
Date Reply #1 on Tue 02 Feb 2016 04:51 AM (UTC)

Amended on Tue 02 Feb 2016 04:52 AM (UTC) by Nick Gammon

Message
For the first letter of a sentence:


foo = string.gsub ("i like you", "^.", string.upper)

print (foo)  --> I like you


To capitalize every word you can use a (rather obscure) frontier pattern, like this:


foo = string.gsub ("i like you", "%f[%a].", string.upper)

print (foo)  --> I Like You


In both cases I am using a regular expression to find what we want to capitalize. Then we pass down the standard function string.upper to string.gsub, and that turns the matching text into upper case.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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Posted by Lxhd   (27 posts)  [Biography] bio
Date Reply #2 on Tue 02 Feb 2016 05:18 AM (UTC)
Message
Thanks a lot.
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