Lua：table.remove不适用于2D数组

Question

t = { 
  { 7, "123" }, 
  { 8, "234" }, 
  { 9, "345" }
}

t = table.remove(t, 1) -- This thing brokes everything, but should delete first group

for k, v in ipairs(t) do
  print(k, v[1], v[2])
end

This thing just hates me, I fighting with it for 4 hours and ca not move from dead point. Tried several different loops, different letters positions ( v[1] -> k[1] , etc), nothing helps.

Answer 1

table.remove returns the removed element, not the updated table. Just don't assign t = table.remove(t, 1) but instead discard the return value, ie a bare table.remove(t, 1) without any assignment.

See also the manual :

table.remove (table [, pos])

Removes from table the element at position pos , shifting down other elements to close the space, if necessary. Returns the value of the removed element. The default value for pos is n , where n is the length of the table, so that a call table.remove(t) removes the last element of table t .

t = { 
  { 7, "123" }, 
  { 8, "234" }, 
  { 9, "345" }
}

table.remove(t, 1)

for k, v in pairs(t) do
  print(k, v[1], v[2])
end