Remove data from table in Lua

Remove data from table in Lua

There are two ways to remove data in a table

Method 1: Press the mark to remove

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

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

Output:

remove an item of data in pairs

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 empty a value

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 an item in pairs

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

Output result: