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Line 15:
Line 15:
-- * Collection functions.
-- * Collection functions.
+
+function Utils.isArray(xs)
+ for k, _ in pairs(xs) do
+ return k == 1
+ end
+ return true
+end
+
+function Utils.findBy(xs, p)
+ if Utils.isArray(xs) then
+ for k, v in ipairs(xs) do
+ if p(v, k) then
+ return v, k
+ end
+ end
+ else
+ for k, v in pairs(xs) do
+ if p(v, k) then
+ return v, k
+ end
+ end
+ end
+ return nil
+end
function Utils.find(tbl, v_, k_)
function Utils.find(tbl, v_, k_)