Data update

Task/Forward-difference/Pluto/forward-difference.pluto

@@ -0,0 +1,21 @@
+local fmt = require "fmt"
+require "table2"
+
+local function forward_diff(a, order)
+    assert(order >= 0 and order % 1 == 0, "Order must be a non-negative integer.")
+    if #a == 0 then return end
+    io.write(" 0: ")
+    fmt.tprint("%5d", a)
+    if #a == 1 then return end
+    if order == 0 then return end
+    for o = 1, order do
+        local b = table.rep(#a - 1, 0)
+        for i = 1, #b do b[i] = a[i + 1] - a[i] end
+        io.write($" {o}: ")
+        fmt.tprint("%5d", b)
+        if #b == 1 then return end
+        a = b
+    end
+end
+
+forward_diff({90, 47, 58, 29, 22, 32, 55, 5, 55, 73}, 9)