lua_seti

lua_seti[-1, +0, e]

void lua_seti (lua_State *L, int index, lua_Integer n);

Does the equivalent to t[n] = v, where t is the value at the given index and v is the value at the top of the stack.

This function pops the value from the stack. As in Lua, this function may trigger a metamethod for the "newindex" event (see §2.4).