I am experimenting with the following lua code:
function test() return 1, 2 end
function test2() return test() end
function test3() return test(), 3 end
print(test()) -- prints 1 2
print(test2()) -- prints 1 2
print(test3()) -- prints 1 3
I would like test3 to return 1, 2, 3
What is the best way to achieve this?
you could do something like this if you aren't sure how many values some function may return.
function test() return 1, 2 end
function test2() return test() end
function test3()
local values = {test2()}
table.insert(values, 3)
return unpack(values)
end
print(test3())
this outputs:
1 2 3
return test(), test() - I get 1 1 2. Probably I would need to catch each "tuple" with { }, and then concatenate* (not "merge") them here. (*) - see stackoverflow.com/questions/1410862/… vs stackoverflow.com/questions/1283388/lua-merge-tables
return test(), test() is just a slightly diff. variant of the return test(), 3 example in the OP. a far better explanation than I could give is located on this programming in lua document
unpack as the params to another function? If so, what's the syntax?...
function test3()
local var1, var2 = test()
return var1, var2, 3
end
print(test3())
print(table.unpack(testN()), where testN returns some unknown number of return values, would print all of the return values!
I have also found that with the function call at the end of the list the return values are not truncated. If order of the arguments does not matter this works well.
function test() return 1, 2 end
function test2() return test() end
function test3() return 3, test() end
print(test()) -- prints 1 2
print(test2()) -- prints 1 2
print(test3()) -- prints 3 1 2
test()if it is being returned with another value.