CODEWITHSUNDEEP
stringlualua-tablecomputercraft
Lysus
Lysus

Reputation: 61

How to remove a string from a table

I've been trying to find a way to remove a string from a table kind of like this:

myTable = {'string1', 'string2'}
table.remove(myTable, 'string1')

but I haven't been able to find anyway to do it. Can someone help?

Upvotes: 6

Views: 3247

Answers (2)

ryanpattison
ryanpattison

Reputation: 6251

As hjpotter92 said, table.remove expects the position you want removed and not the value so you will have to search. The function below searches for the position of value and uses table.remove to ensure that the table will remain a valid sequence.

function removeFirst(tbl, val)
  for i, v in ipairs(tbl) do
    if v == val then
      return table.remove(tbl, i)
    end
  end
end

removeFirst(myTable, 'string1')

Upvotes: 4

hjpotter92
hjpotter92

Reputation: 80639

table.remove accepts the position of an element as its second argument. If you're sure that string1 appears at the first index/position; you can use:

table.remove(myTable, 1)

alternatively, you have to use a loop:

for k, v in pairs(myTable) do -- ipairs can also be used instead of pairs
    if v == 'string1' then
        myTable[k] = nil
        break
    end
end

Upvotes: 2

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