Lua convert table to string

Question

I cannot find the correct solution or I get an error for something that is very simple in C: how can I convert/move data from a table to string?

The C equivalent of what I am trying to do is:

for (i=0; i <10; i++)
{
    string[i] = table[i]
}

I can convert from string to table with :byte(i) but I don't understand how to append a sign in string.

So you have a table like {"x", "y", "z"}, and you want "xyz"? — Joseph Sible-Reinstate Monica
– Joseph Sible-Reinstate Monica, Commented Aug 7, 2022 at 21:29

Skully · Accepted Answer · 2022-08-08 11:08:03Z

3

To create a string from all values in a table you can use table.concat, this will concatenate each character in a table.

local myTable = { "h", "e", "l", "l", "o" }
local combinedString = table.concat(myTable)
print(combinedString) -- Outputs hello

Run Code Demo

edited Aug 8, 2022 at 11:08

answered Aug 7, 2022 at 23:47

Skully

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4 Comments

terefere Over a year ago

Hi Skully, is small problem. 1. Table have ASCI value, and the same result I get in print- value 49(dec) will print as 49, not ASCI "1". 2. Table start's from 0, not 1 so table.contact miss first character I not write it also, but table in real is 16bit where first 8bit is empty. my code

code     MD_BUF[0] = 48     MD_BUF[1] = "a"     MD_BUF[2] = 50     MD_BUF[3] = 51     MD_BUF[4] = 52     MD_BUF[5] = 53     MD_BUF[6] = 54     MD_BUF[7] = 55     MD_BUF[8] = 56     MD_BUF[9] = 57      string_buf = table.concat(MD_BUF)     print(string_buf)

result: a5051525354555657

terefere Over a year ago

Sorry, I cannot win with text formating when at comment writing ;/ I try to use loop with MD_BUF[i] = string.char(MD_BUF[i]) before table.concat but still I error with bad argument.

Skully Over a year ago

I am having trouble understanding what you mean, is your array full of hexadecimal values that you want to convert to characters? Also, you can paste your code and update your existing question and explain what you mean there more clearly - if you can provide an input and expected output, it would be helpful to understand what you mean.

terefere Over a year ago

I want to send text to device and display it. Table who keep this data is 16bit but I use only ASCI. So, in my table I have: code BUF[0]= 0x48 BUF[1]= 0x65 BUF[2]= 0x6c BUF[3]= 0x6c BUF[4]= 0x6f And this table I need to change to string who give me "hello" when I print it. Sorry, I really try to past code here, but I don't know where I made mistake with formatting

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