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[byte]
description = 'Returns the internal numeric codes of the characters `s[i], s[i+1], ..., s[j]`.'
[char]
description = 'Returns a string with length equal to the number of arguments, in which each character has the internal numeric code equal to its corresponding argument.'
[dump]
description = 'Returns a string containing a binary representation (a *binary chunk*) of the given function.'
[find]
description = 'Looks for the first match of [`pattern`](https://www.lua.org/manual/5.3/manual.html#6.4.1) in the string.'
[format]
description = 'Returns a formatted version of its variable number of arguments following the description given in its first argument.'
[gmatch]
description = [[
----------
```lua
s = "hello world from Lua"
for w in string.gmatch(s, "%a+") do
print(w)
end
```
]]
["gmatch Lua 5.4"]
description = [[
----------
```lua
s = "hello world from Lua"
for w in string.gmatch(s, "%a+") do
print(w)
end
```
]]
[gsub]
description = 'Returns a copy of s in which all (or the first `n`, if given) occurrences of the [`pattern`](https://www.lua.org/manual/5.3/manual.html#6.4.1) have been replaced by a replacement string specified by `repl`.'
[len]
description = 'Returns its length.'
[lower]
description = 'Returns a copy of this string with all uppercase letters changed to lowercase.'
[match]
description = 'Looks for the first match of [`pattern`](https://www.lua.org/manual/5.3/manual.html#6.4.1) in the string.'
[pack]
description = 'Returns a binary string containing the values `v1`, `v2`, etc. packed (that is, serialized in binary form) according to the format string [`fmt`](https://www.lua.org/manual/5.3/manual.html#6.4.2).'
[packsize]
description = 'Returns the size of a string resulting from `string.pack` with the given format.'
[rep]
description = 'Returns a string that is the concatenation of `n` copies of the string `s` separated by the string `sep`.'
['rep Lua 5.1']
description = 'Returns a string that is the concatenation of `n` copies of the string `s` .'
[reverse]
description = 'Returns a string that is the string `s` reversed.'
[sub]
description = 'Returns the substring of the string that starts at `i` and continues until `j`.'
[unpack]
description = 'Returns the values packed in string according to the format string [`fmt`](https://www.lua.org/manual/5.3/manual.html#6.4.2).'
[upper]
description = 'Returns a copy of this string with all lowercase letters changed to uppercase.'
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