Initial commit

1 files changed, 41 insertions, 0 deletions

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+--- lam.util
+
+local util = {}
+
+function util.table (x)
+        if type(x) == "table" then
+                return x
+        else
+                return { x }
+        end
+end
+
+function util.pop (tbl)
+        return table.remove(tbl, 1)
+end
+
+function util.car (tbl)
+        return tbl[1]
+end
+
+function util.cdr (tbl)
+        local t = {}
+        for i = 2, #tbl do t[i-1] = tbl[i] end
+        return t
+end
+
+function util.reduce (tbl, seed, fn)
+        if #tbl == 0 then return seed end
+        return util.reduce(tbl, fn(seed, util.pop(tbl)), fn)
+end
+
+function util.map (fn, tbl)
+        local out = {}
+        for k, v in pairs(tbl) do
+                out[k] = fn(v)
+        end
+        return out
+end
+
+---
+return util