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Can I Get A Hand With These 2 Functions?

 
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Gereksizz
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PostPosted: Mon Jun 10, 2019 4:13 pm    Post subject: Can I Get A Hand With These 2 Functions? Reply with quote
Hey so im trying to do something and i dont get how i can use these 2 functions? can someone help me?

first one is function tonumber(string)

second one is function ansiToUtf8(String) : string

thanks in advance.
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Corroder
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PostPosted: Mon Jun 10, 2019 11:10 pm    Post subject: Reply with quote
Example:

Code:
a = 2
b = 3
print(a+b)

-- result = 5.0
-- because a and b is numbers

a = 2
b = '3'
print('a is '..type(a))
print('b is '..type(b))

-- result
-- a is number
-- b is string

print(a+b)

-- Error:[string "a = 2..."]:10: attempt to perform arithmetic on a string value (global 'b')
-- because try to make math addtion a (number) + b (string)

-- convert b value from string to number
b=tonumber(b)

-- test
print(a+b)
-- result = 5



function ansiToUtf8(String) : string
Converts a string in Ansi encoding to UTF8

ANSI stands for American National Standards Institute.
The ANSI character set includes the standard ASCII character set (values 0 to 127),
plus an extended character set (values 128 to 255).
The ANSI character set is used by Windows end refers to the codepage 1252 known as "Latin 1 Windows"

ANSI Table : http://ascii-table.com/ansi-codes.php
UTF8 Table : https://www.utf8-chartable.de/unicode-utf8-table.pl

Code:
str = 'ƒ ‰ ®' -- is ANSI string text
print(ansiToUtf8(str))
-- result = 'Æ’ ‰ ®'  -- is UTF8 characters



Addition: UTF8 Characters

Example to print out: ʸ√x + ʸ√2 - x²

Code:
print(utf8.char(0x02B8)..utf8.char(0x221A)..'x'..'+'..utf8.char(0x02B8)..utf8.char(0x221A)..'2'..'-'..'x'..utf8.char(0x00B2))


EDIT:
I guess you are play FF game series
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panraven
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PostPosted: Tue Jun 11, 2019 2:57 am    Post subject: Reply with quote
What version the lua you are using?
Lua do implicit conversion in some case
Code:

-- lua @ ce 6.6
local a,b = 1,"2.5"
print(a+b) // 3.5 - number
print(b..a) // 2.51 - string

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Corroder
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PostPosted: Tue Jun 11, 2019 4:46 am    Post subject: Reply with quote
Yes, Panranven. I think from my sample:

Code:
a = 2
b = '3'
print(a+b)


should be = 5 because Lua will automatically translate this b = '3' as a number, but the error appears on my CE 6.8.3 (Lua 5.3) as shown above. I tried again on my Lua 5.3 for window console, the code 2 + '3' give result 5.0.

I have tested again CE 6.8.3 and test the same code (without any other line code) and the result is 5.0.

Back to the topic which asked for, here another reference:

Code:
> = 100 == "100"
false
> = 100 ~= "hello"
true
> = 100 ~= {}
true
> = 100 == tonumber("100")
true
> = 100 <= "100"
stdin:1: attempt to compare number with string
stack traceback:
        stdin:1: in main chunk
        [C]: ?

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