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prune method in utils

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This commit is contained in:
kepler155c@gmail.com 2018-10-24 19:13:05 -04:00
parent 605e923d48
commit c75938bef9
1 changed files with 14 additions and 0 deletions
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14
sys/apis/util.lua
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@ -172,6 +172,20 @@ function Util.deepMerge(obj, args)
end
end
-- remove table entries if passed function returns false
function Util.prune(t, fn)
for _,k in pairs(Util.keys(t)) do
local v = t[k]
if type(v) == 'table' then
t[k] = Util.prune(v, fn)
end
if not fn(t[k]) then
t[k] = nil
end
end
return t
end
function Util.transpose(t)
local tt = { }
for k,v in pairs(t) do