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Remove data in table in Lua

There are two ways to remove data from the table

Method 1: Press the mark to remove

table.remove(table_name, [pos,])
Directly remove a subscript data, for example:

local t = {
    5, 6, 7  , 8}
 table.remove(t, 2)
 for k, v in pairs(t  ) do
     print(k, v)
 end

Output result:

Remove a certain item from pairs item data

local t = {
    5, 6, 7  , 8}
 for k, v in pairs(t  ) do
     if k == 2 then
         table.remove(t, 2)
     end
 end

 for k, v in pairs(t  ) do
     print(k, v)
 end

Output result:

Method 2: leave a value blank

table[k] = nil
Directly set a value to nothing

local a = {
     ['3019'] = 3019,
     ['3020'] = 3020,
     ['3021'] = 3021,
     ['3017'] = 3017
 }

 a['3019'] = nil

 for k, v in pairs(a  ) do
     print(k, v)
 end

Output result:

Empty one in pairs item

local a = {
     ['3019'] = 3019,
     ['3020'] = 3020,
     ['3021'] = 3021,
     ["3017"] = 3017,
 }

 for k,v in pairs(a  ) do
     if k == '3019' then
         a[k] = nil
     end
 end

 for k, v in pairs(a  ) do
     print(k,v)
 end