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util.lua
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util.lua
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--[[
Copyright 2019 Zakru
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 <https://www.gnu.org/licenses/>.
]]
_G.iter = function(t)
if t == nil then return function() return nil end end
local i = 0
return function()
i = i + 1
return t[i]
end
end
function table.count(t, func)
local count = 0
local function increment(...)
if func(...) then
count = count + 1
end
end
table.foreach(t, increment)
return count
end
function table.some(t, func)
for v in iter(t) do
if func(v) then
return true
end
end
return false
end
function table.all(t, func)
for v in iter(t) do
if not func(v) then
return false
end
end
return true
end
function table.filter(t, func)
local t2 = {}
for i=1,#t do
if func(t[i]) then
table.insert(t2, t[i])
end
end
return t2
end