AWK, Bash, Lua, Node.js, Python and Ruby solutions for week 133, part 2.

1 files changed, 52 insertions, 0 deletions

diff --git a/challenge-133/abigail/node/ch-2.js b/challenge-133/abigail/node/ch-2.js
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index 0000000000..1000e451d7
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+++ b/challenge-133/abigail/node/ch-2.js
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+#!/usr/local/bin/node
+
+//
+// See ../README.md
+//
+
+//
+// Run as: node ch-2.js < input-file
+//
+
+let small_primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31]
+
+function factorize (num) {
+    let out = []
+    small_primes . forEach (prime => {
+        while (num % prime == 0) {
+            out . push (prime)
+            num /= prime
+        }
+    })
+
+    if (num > 1) {
+        out . push (num)
+    }
+
+    return out
+}
+
+
+function digit_sum (numbers) {
+    let sum = 0
+    numbers . forEach (number => {
+        while (number > 0) {
+            sum += number % 10
+            number = Math . floor (number / 10)
+        }
+    })
+    return sum
+}
+
+
+let count  = 0
+let number = 1
+
+while (count < 10) {
+    let factors = factorize (number)
+    if (factors . length > 1 && digit_sum ([number]) == digit_sum (factors)) {
+        console . log (number)
+        count ++
+    }
+    number ++
+}