wolfadmin/luascripts/util/tables.lua

-- WolfAdmin module for Wolfenstein: Enemy Territory servers.
-- Copyright (C) 2015-2017 Timo 'Timothy' Smit

-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- at your option any later version.

-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License for more details.

-- You should have received a copy of the GNU General Public License
-- along with this program.  If not, see <http://www.gnu.org/licenses/>.

local tables = {}

function tables.copy(table)
    local copy = {}

    for key, value in pairs(table) do
        copy[key] = value
    end

    return copy
end

function tables.unpack(table)
    if table.unpack ~= nil then
        return table.unpack(table)
    elseif unpack ~= nil then
        return unpack(table)
    end
end

function tables.contains(table, needle)
    for key, value in pairs(table) do
        if value == needle then
            return true
        end
    end

    return false
end

function tables.find(table, needle)
    for key, value in pairs(table) do
        if value == needle then
            return key
        end
    end

    return nil
end

return tables