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Moreover, Lua offers good support for functional programming, including nested functions with proper lexical scoping; just wait. Finally, first-class functions play a key role in Lua's object-oriented facilities, as we will see in Chapter 16. Lua can call functions written in Lua and functions written in C. All the standard library in Lua is.
Lua C Table Iteration. The bug is in luanext(L, -2) line, because -2 refers to stack top minus one, which happens here to be the last argument to print. Use luanext(L, i) instead. Upd: Lua stack indexes are subject to float when moving code around at development stage, so the general advice is to.

Lua C Nested Table In C

Example

The Lua standard library provides a pairs function which iterates over the keys and values of a table. When iterating with pairs there is no specified order for traversal, even if the keys of the table are numeric.

Most pure lua print table functions I've seen have a problem with deep recursion and tend to cause a stack overflow when. This print table function that I've written does not have this problem. It should also be capable of handling. Really large tables due to the way it handles concatenation.

For tables using numeric keys, Lua provides an ipairs function. The ipairs function will always iterate from table[1], table[2], etc. until the first nil value is found.

Frp samsung sm t560nu. Be warned that iteration using ipairs() will not work as you might want on few occasions:

input_table has 'holes' in it. (See the section on 'Avoiding gaps in tables used as arrays' for more information.) For example:
keys weren't all numeric. For example:

Of course, the following also works for a table that is a proper sequence:

Archer Tower (Spesial Edition!). Witch Tower. Damager Healer TowerETC. https://evervibe.amebaownd.com/posts/20082484. Barbarian Tower.

Iterating a numeric table in reverse order is easy:

A final way to iterate over tables is to use the next selector in a generic for loop. Like pairs there is no specified order for traversal. (The pairs method uses next internally. So using next is essentially a more manual version of pairs. See pairs in Lua's reference manual and next in Lua's reference manual for more details.)

[Lua] Print table function for deeply nested tables

print_table.lua

Lua C Nested Table Example

--[[

Most pure lua print table functions I've seen have a problem with deep recursion and tend to cause a stack overflow when

going too deep. This print table function that I've written does not have this problem. It should also be capable of handling

really large tables due to the way it handles concatenation. In my personal usage of this function, it outputted 63k lines to

file in about a second.

The output also keeps lua syntax and the script can easily be modified for simple persistent storage by writing the output to

file if modified to allow only number, boolean, string and table data types to be formatted.

author: Alundaio (aka Revolucas)

--]]

functionprint_table(node)

-- to make output beautiful

localfunctiontab(amt)

local str =''

for i=1,amt do

str = str .'t'

end

return str

end

local cache, stack, output = {},{},{}

local depth =1

local output_str ='{n'

whiletruedo

local size =0

for k,v inpairs(node) do

size = size +1

end

local cur_index =1

for k,v inpairs(node) do

if (cache[node] nil) or (cur_index >= cache[node]) then

if (string.find(output_str,'}',output_str:len())) then

output_str = output_str .',n'

elseifnot (string.find(output_str,'n',output_str:len())) then

output_str = output_str .'n'

end

-- This is necessary for working with HUGE tables otherwise we run out of memory using concat on huge strings

table.insert(output,output_str)

output_str =''

local key

if (type(k) 'number'ortype(k) 'boolean') then

key ='['.tostring(k).']'

else

key ='[''.tostring(k).'']'

end

if (type(v) 'number'ortype(v) 'boolean') then

output_str = output_str .tab(depth) . key .' = '.tostring(v)

elseif (type(v) 'table') then

output_str = output_str .tab(depth) . key .' = {n'

table.insert(stack,node)

table.insert(stack,v)

cache[node] = cur_index+1

break

else

output_str = output_str .tab(depth) . key .' = ''.tostring