RogerBW solutions for challenge no. 279

23 files changed, 791 insertions, 0 deletions

diff --git a/challenge-279/roger-bell-west/crystal/ch-1.cr b/challenge-279/roger-bell-west/crystal/ch-1.cr
new file mode 100755
index 0000000000..6b9ee7a5d1
--- /dev/null
+++ b/challenge-279/roger-bell-west/crystal/ch-1.cr
@@ -0,0 +1,21 @@
+#! /usr/bin/crystal
+require "spec"
+describe "sortletters" do
+  it "test_ex1" do
+    sortletters(['R', 'E', 'P', 'L'], [3, 2, 1, 4]).should eq "PERL"
+  end
+  it "test_ex2" do
+    sortletters(['A', 'U', 'R', 'K'], [2, 4, 1, 3]).should eq "RAKU"
+  end
+  it "test_ex3" do
+    sortletters(['O', 'H', 'Y', 'N', 'P', 'T'], [5, 4, 2, 6, 1, 3]).should eq "PYTHON"
+  end
+end
+
+def sortletters(a, n)
+  out = a.clone
+  a.each_with_index do |l, i|
+    out[n[i] - 1] = l
+  end
+  out.join("")
+end
diff --git a/challenge-279/roger-bell-west/crystal/ch-2.cr b/challenge-279/roger-bell-west/crystal/ch-2.cr
new file mode 100755
index 0000000000..7583c95641
--- /dev/null
+++ b/challenge-279/roger-bell-west/crystal/ch-2.cr
@@ -0,0 +1,26 @@
+#! /usr/bin/crystal
+require "spec"
+describe "splitstring" do
+  it "test_ex1" do
+    splitstring("perl").should eq false
+  end
+  it "test_ex2" do
+    splitstring("book").should eq true
+  end
+  it "test_ex3" do
+    splitstring("goodmorning").should eq true
+  end
+end
+
+def splitstring(a)
+  n = 0
+  a.downcase.chars.each do |cc|
+    n += case cc
+         when 'a', 'e', 'i', 'o', 'u'
+           1
+         else
+           0
+         end
+  end
+  n % 2 == 0
+end
diff --git a/challenge-279/roger-bell-west/javascript/ch-1.js b/challenge-279/roger-bell-west/javascript/ch-1.js
new file mode 100755
index 0000000000..bac790774a
--- /dev/null
+++ b/challenge-279/roger-bell-west/javascript/ch-1.js
@@ -0,0 +1,30 @@
+#! /usr/bin/node
+
+"use strict"
+
+function sortletters(a, c) {
+    let out = Array(a.length);
+    a.forEach((l, i) => {
+        out[c[i] - 1] = l;
+    });
+    return out.join("");
+}
+
+if (sortletters(['R', 'E', 'P', 'L'], [3, 2, 1, 4]) == 'PERL') {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (sortletters(['A', 'U', 'R', 'K'], [2, 4, 1, 3]) == 'RAKU') {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (sortletters(['O', 'H', 'Y', 'N', 'P', 'T'], [5, 4, 2, 6, 1, 3]) == 'PYTHON') {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write("\n");
diff --git a/challenge-279/roger-bell-west/javascript/ch-2.js b/challenge-279/roger-bell-west/javascript/ch-2.js
new file mode 100755
index 0000000000..0a8393a0bb
--- /dev/null
+++ b/challenge-279/roger-bell-west/javascript/ch-2.js
@@ -0,0 +1,37 @@
+#! /usr/bin/node
+
+"use strict"
+
+function splitstring(a) {
+    let n = 0
+    for (let cc of a.toLowerCase().split("")) {
+        switch (cc.toLowerCase()) {
+        case "a":
+        case "e":
+        case "i":
+        case "o":
+        case "u":
+            n++;
+        }
+    }
+    return n % 2 == 0
+}
+
+if (!splitstring('perl')) {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (splitstring('book')) {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (splitstring('goodmorning')) {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write("\n");
diff --git a/challenge-279/roger-bell-west/kotlin/ch-1.kt b/challenge-279/roger-bell-west/kotlin/ch-1.kt
new file mode 100644
index 0000000000..912874a8b0
--- /dev/null
+++ b/challenge-279/roger-bell-west/kotlin/ch-1.kt
@@ -0,0 +1,30 @@
+fun sortletters(a: List<Char>, c: List<Int>): String {
+    var out = ArrayList<Char>(a)
+    a.forEachIndexed{i, l ->
+                       out[c[i] - 1] = l
+    }
+    return out.joinToString("")
+}
+
+fun main() {
+
+    if (sortletters(listOf('R', 'E', 'P', 'L'), listOf(3, 2, 1, 4)) == "PERL") {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (sortletters(listOf('A', 'U', 'R', 'K'), listOf(2, 4, 1, 3)) == "RAKU") {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (sortletters(listOf('O', 'H', 'Y', 'N', 'P', 'T'), listOf(5, 4, 2, 6, 1, 3)) == "PYTHON") {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    println("")
+
+}
diff --git a/challenge-279/roger-bell-west/kotlin/ch-2.kt b/challenge-279/roger-bell-west/kotlin/ch-2.kt
new file mode 100644
index 0000000000..a61a196940
--- /dev/null
+++ b/challenge-279/roger-bell-west/kotlin/ch-2.kt
@@ -0,0 +1,33 @@
+fun splitstring(a: String): Boolean {
+    var n = 0
+    for (cc in a.lowercase().toList()) {
+        n += when (cc) {
+            'a', 'e', 'i', 'o', 'u' -> 1
+            else -> 0
+        }
+    }
+    return n % 2 == 0
+}
+
+fun main() {
+
+    if (!splitstring("perl")) {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (splitstring("book")) {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (splitstring("goodmorning")) {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    println("")
+
+}
diff --git a/challenge-279/roger-bell-west/lua/ch-1.lua b/challenge-279/roger-bell-west/lua/ch-1.lua
new file mode 100755
index 0000000000..a629772a39
--- /dev/null
+++ b/challenge-279/roger-bell-west/lua/ch-1.lua
@@ -0,0 +1,42 @@
+#! /usr/bin/lua
+
+function join(t)
+   local out=""
+   for i, v in ipairs(t) do
+      out = out .. v
+   end
+   return out
+end
+
+function sortletters(a, n)
+   local out = {}
+   for _a, _b in ipairs(a) do
+      table.insert(out, "")
+   end
+   for i, l in ipairs(a) do
+      out[n[i]] = l
+   end
+   return join(out)
+end
+
+if sortletters({"R", "E", "P", "L"}, {3, 2, 1, 4}) == "PERL" then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if sortletters({"A", "U", "R", "K"}, {2, 4, 1, 3}) == "RAKU" then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if sortletters({"O", "H", "Y", "N", "P", "T"}, {5, 4, 2, 6, 1, 3}) == "PYTHON" then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+print("")
+
diff --git a/challenge-279/roger-bell-west/lua/ch-2.lua b/challenge-279/roger-bell-west/lua/ch-2.lua
new file mode 100755
index 0000000000..92edbe4bd6
--- /dev/null
+++ b/challenge-279/roger-bell-west/lua/ch-2.lua
@@ -0,0 +1,44 @@
+#! /usr/bin/lua
+
+function split(t)
+   local cl = {}
+   string.gsub(t,
+               "(.)",
+               function(c)
+                  table.insert(cl, c)
+               end
+   )
+   return cl
+end
+
+function splitstring(a)
+   local n = 0
+   for _, cc in ipairs(split(string.lower(a))) do
+      if string.find(cc, "[aeiou]") == 1 then
+         n = n + 1
+      end
+   end
+   return n % 2 == 0
+end
+
+if not splitstring("perl") then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if splitstring("book") then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if splitstring("goodmorning") then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+print("")
+
diff --git a/challenge-279/roger-bell-west/perl/ch-1.pl b/challenge-279/roger-bell-west/perl/ch-1.pl
new file mode 100755
index 0000000000..103430c4ea
--- /dev/null
+++ b/challenge-279/roger-bell-west/perl/ch-1.pl
@@ -0,0 +1,19 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+use experimental 'signatures';
+
+use Test::More tests => 3;
+
+is(sortletters(['R', 'E', 'P', 'L'], [3, 2, 1, 4]), 'PERL', 'example 1');
+is(sortletters(['A', 'U', 'R', 'K'], [2, 4, 1, 3]), 'RAKU', 'example 2');
+is(sortletters(['O', 'H', 'Y', 'N', 'P', 'T'], [5, 4, 2, 6, 1, 3]), 'PYTHON', 'example 3');
+
+sub sortletters($a, $n) {
+  my @out = ("") x scalar @{$a};
+  while (my ($i, $l) = each @{$a}) {
+    $out[$n->[$i] - 1] = $l;
+  }
+  return join('', @out);
+}
diff --git a/challenge-279/roger-bell-west/perl/ch-2.pl b/challenge-279/roger-bell-west/perl/ch-2.pl
new file mode 100755
index 0000000000..a26973a6ed
--- /dev/null
+++ b/challenge-279/roger-bell-west/perl/ch-2.pl
@@ -0,0 +1,21 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+use experimental 'signatures';
+
+use Test::More tests => 3;
+
+is(splitstring('perl'), 0, 'example 1');
+is(splitstring('book'), 1, 'example 2');
+is(splitstring('goodmorning'), 1, 'example 3');
+
+sub splitstring($a) {
+  my $n = 0;
+  foreach my $cc (split '', lc($a)) {
+    if ($cc =~ /[aeiou]/) {
+      $n++;
+    }
+  }
+  return ($n % 2 == 0)?1:0;
+}
diff --git a/challenge-279/roger-bell-west/postscript/ch-1.ps b/challenge-279/roger-bell-west/postscript/ch-1.ps
new file mode 100644
index 0000000000..3aa659cd91
--- /dev/null
+++ b/challenge-279/roger-bell-west/postscript/ch-1.ps
@@ -0,0 +1,114 @@
+%!PS
+
+% begin included library code
+% see https://codeberg.org/Firedrake/postscript-libraries/
+/s2a {
+    [ exch { } forall ]
+} bind def
+
+/strconcat % (a) (b) -> (ab)  
+{
+    [
+        3 -1 roll
+        s2a aload length
+        2 add -1 roll
+        s2a aload pop
+    ] a2s
+} bind def
+
+/test.end {
+    ( ) print
+    test.count 0 gt {
+        (Passed ) print
+        test.pass (...) cvs print
+        (/) print
+        test.count (...) cvs print
+        ( \() print
+        test.pass 100 mul test.count idiv (...) cvs print
+        (%\)) print
+        (\r\n) print
+    } if
+} bind def
+
+/a2s {
+    2 dict begin
+    /i exch def
+    i length dup string /o exch def
+    1 sub 0 exch 1 exch {
+        dup i 3 -1 roll get o 3 1 roll put
+    } for
+    o
+    end
+} bind def
+
+/test {
+    /test.count test.count 1 add def
+    {
+        /test.pass test.pass 1 add def
+    } {
+        ( ) print
+        test.count (....) cvs print
+        (-fail) print
+    } ifelse
+} bind def
+
+/enumerate.array {
+    1 dict begin
+    /a exch def
+    [
+      0 1 a length 1 sub {
+          [ exch dup a exch get ]
+      } for
+    ]
+    end
+} bind def
+
+/test.start {
+    print (:) print
+    /test.pass 0 def
+    /test.count 0 def
+} bind def
+
+/strjoin % [(a) (b) (c)] (j) -> (ajbjc)
+{
+    3 dict begin
+    /j exch def
+    dup 0 get /out exch def
+    /first true def
+    {
+        first {
+            pop
+            /first false def
+        } {
+            out j strconcat
+            exch strconcat
+            /out exch def
+        } ifelse
+    } forall
+    out
+    end
+} bind def
+
+
+% end included library code
+
+/sortletters {
+    0 dict begin
+    /c exch def
+    /a exch def
+    /out a length array def
+    a enumerate.array {
+        aload pop
+        /l exch def
+        /i exch def
+        out c i get 1 sub l put
+    } forall
+    out () strjoin
+    end
+} bind def
+
+(sortletters) test.start
+[(R) (E) (P) (L)] [3 2 1 4] sortletters (PERL) eq test
+[(A) (U) (R) (K)] [2 4 1 3] sortletters (RAKU) eq test
+[(O) (H) (Y) (N) (P) (T)] [5 4 2 6 1 3] sortletters (PYTHON) eq test
+test.end
diff --git a/challenge-279/roger-bell-west/postscript/ch-2.ps b/challenge-279/roger-bell-west/postscript/ch-2.ps
new file mode 100644
index 0000000000..ef5892e451
--- /dev/null
+++ b/challenge-279/roger-bell-west/postscript/ch-2.ps
@@ -0,0 +1,67 @@
+%!PS
+
+% begin included library code
+% see https://codeberg.org/Firedrake/postscript-libraries/
+/test {
+    /test.count test.count 1 add def
+    {
+        /test.pass test.pass 1 add def
+    } {
+        ( ) print
+        test.count (....) cvs print
+        (-fail) print
+    } ifelse
+} bind def
+
+/test.end {
+    ( ) print
+    test.count 0 gt {
+        (Passed ) print
+        test.pass (...) cvs print
+        (/) print
+        test.count (...) cvs print
+        ( \() print
+        test.pass 100 mul test.count idiv (...) cvs print
+        (%\)) print
+        (\r\n) print
+    } if
+} bind def
+
+/toset { % array -> dict of (value, true)
+    << exch
+       {
+           true
+       } forall
+    >>
+} bind def
+
+/s2a {
+    [ exch { } forall ]
+} bind def
+
+/test.start {
+    print (:) print
+    /test.pass 0 def
+    /test.count 0 def
+} bind def
+
+
+% end included library code
+
+/splitstring {
+    0 dict begin
+    /vowels (aeiouAEIOU) s2a toset def
+    true exch
+    {
+        vowels exch known {
+            not
+        } if
+    } forall
+    end
+} bind def
+
+(splitstring) test.start
+(perl) splitstring not test
+(book) splitstring test
+(goodmorning) splitstring test
+test.end
diff --git a/challenge-279/roger-bell-west/python/ch-1.py b/challenge-279/roger-bell-west/python/ch-1.py
new file mode 100755
index 0000000000..6e1eb74a7a
--- /dev/null
+++ b/challenge-279/roger-bell-west/python/ch-1.py
@@ -0,0 +1,22 @@
+#! /usr/bin/python3
+
+def sortletters(a, n):
+  out = a.copy()
+  for i, l in enumerate(a):
+    out[n[i] - 1] = l
+  return "".join(out)
+
+import unittest
+
+class TestSortletters(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(sortletters(["R", "E", "P", "L"], [3, 2, 1, 4]), "PERL", 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(sortletters(["A", "U", "R", "K"], [2, 4, 1, 3]), "RAKU", 'example 2')
+
+  def test_ex3(self):
+    self.assertEqual(sortletters(["O", "H", "Y", "N", "P", "T"], [5, 4, 2, 6, 1, 3]), "PYTHON", 'example 3')
+
+unittest.main()
diff --git a/challenge-279/roger-bell-west/python/ch-2.py b/challenge-279/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..480e58ab2e
--- /dev/null
+++ b/challenge-279/roger-bell-west/python/ch-2.py
@@ -0,0 +1,24 @@
+#! /usr/bin/python3
+
+def splitstring(a):
+  n = 0
+  for cc in a:
+    match cc.lower():
+      case 'a' | 'e' | 'i' | 'o' | 'u':
+        n += 1
+  return n % 2 == 0
+
+import unittest
+
+class TestSplitstring(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(splitstring("perl"), False, 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(splitstring("book"), True, 'example 2')
+
+  def test_ex3(self):
+    self.assertEqual(splitstring("goodmorning"), True, 'example 3')
+
+unittest.main()
diff --git a/challenge-279/roger-bell-west/raku/ch-1.p6 b/challenge-279/roger-bell-west/raku/ch-1.p6
new file mode 100755
index 0000000000..ecc790d05a
--- /dev/null
+++ b/challenge-279/roger-bell-west/raku/ch-1.p6
@@ -0,0 +1,17 @@
+#! /usr/bin/raku
+
+use Test;
+
+plan 3;
+
+is(sortletters(['R', 'E', 'P', 'L'], [3, 2, 1, 4]), 'PERL', 'example 1');
+is(sortletters(['A', 'U', 'R', 'K'], [2, 4, 1, 3]), 'RAKU', 'example 2');
+is(sortletters(['O', 'H', 'Y', 'N', 'P', 'T'], [5, 4, 2, 6, 1, 3]), 'PYTHON', 'example 3');
+
+sub sortletters(@a, @n) {
+    my @out = ["" x @a.elems];
+    for @a.kv -> $i, $l {
+        @out[@n[$i] - 1] = $l;
+    }
+    return @out.join('');
+}
diff --git a/challenge-279/roger-bell-west/raku/ch-2.p6 b/challenge-279/roger-bell-west/raku/ch-2.p6
new file mode 100755
index 0000000000..d27f3c126d
--- /dev/null
+++ b/challenge-279/roger-bell-west/raku/ch-2.p6
@@ -0,0 +1,19 @@
+#! /usr/bin/raku
+
+use Test;
+
+plan 3;
+
+is(splitstring('perl'), False, 'example 1');
+is(splitstring('book'), True, 'example 2');
+is(splitstring('goodmorning'), True, 'example 3');
+
+sub splitstring($a) {
+    my $n = 0;
+    for $a.lc.comb -> $cc {
+        if ($cc ~~ /<[aeiou]>/) {
+            $n++;
+        }
+    }
+    return $n % 2 == 0;
+}
diff --git a/challenge-279/roger-bell-west/ruby/ch-1.rb b/challenge-279/roger-bell-west/ruby/ch-1.rb
new file mode 100755
index 0000000000..7faf4d27f0
--- /dev/null
+++ b/challenge-279/roger-bell-west/ruby/ch-1.rb
@@ -0,0 +1,27 @@
+#! /usr/bin/ruby
+
+def sortletters(a, n)
+  out = a.clone
+  a.each_with_index do |l, i|
+    out[n[i] - 1] = l
+  end
+  out.join("")
+end
+
+require 'test/unit'
+
+class TestSortletters < Test::Unit::TestCase
+
+  def test_ex1
+    assert_equal('PERL', sortletters(['R', 'E', 'P', 'L'], [3, 2, 1, 4]))
+  end
+
+  def test_ex2
+    assert_equal('RAKU', sortletters(['A', 'U', 'R', 'K'], [2, 4, 1, 3]))
+  end
+
+  def test_ex3
+    assert_equal('PYTHON', sortletters(['O', 'H', 'Y', 'N', 'P', 'T'], [5, 4, 2, 6, 1, 3]))
+  end
+
+end
diff --git a/challenge-279/roger-bell-west/ruby/ch-2.rb b/challenge-279/roger-bell-west/ruby/ch-2.rb
new file mode 100755
index 0000000000..a9c71a6f1e
--- /dev/null
+++ b/challenge-279/roger-bell-west/ruby/ch-2.rb
@@ -0,0 +1,32 @@
+#! /usr/bin/ruby
+
+def splitstring(a)
+  n = 0
+  a.downcase.chars.each do |cc|
+    n += case cc
+         when 'a', 'e', 'i', 'o', 'u'
+           1
+         else
+           0
+         end
+  end
+  n % 2 == 0
+end
+
+require 'test/unit'
+
+class TestSplitstring < Test::Unit::TestCase
+
+  def test_ex1
+    assert_equal(false, splitstring('perl'))
+  end
+
+  def test_ex2
+    assert_equal(true, splitstring('book'))
+  end
+
+  def test_ex3
+    assert_equal(true, splitstring('goodmorning'))
+  end
+
+end
diff --git a/challenge-279/roger-bell-west/rust/ch-1.rs b/challenge-279/roger-bell-west/rust/ch-1.rs
new file mode 100755
index 0000000000..692c711447
--- /dev/null
+++ b/challenge-279/roger-bell-west/rust/ch-1.rs
@@ -0,0 +1,28 @@
+#! /bin/sh
+//usr/bin/env rustc --test $0 -o ${0}x && ./${0}x --nocapture; rm -f ${0}x ; exit
+
+#[test]
+fn test_ex1() {
+    assert_eq!(sortletters(vec!['R', 'E', 'P', 'L'], vec![3, 2, 1, 4]), "PERL");
+}
+
+#[test]
+fn test_ex2() {
+    assert_eq!(sortletters(vec!['A', 'U', 'R', 'K'], vec![2, 4, 1, 3]), "RAKU");
+}
+
+#[test]
+fn test_ex3() {
+    assert_eq!(
+        sortletters(vec!['O', 'H', 'Y', 'N', 'P', 'T'], vec![5, 4, 2, 6, 1, 3]),
+        "PYTHON"
+    );
+}
+
+fn sortletters(a: Vec<char>, n: Vec<usize>) -> String {
+    let mut out: Vec<char> = vec![' '; a.len()];
+    for (i, l) in a.iter().enumerate() {
+        out[n[i] - 1] = *l;
+    }
+    out.iter().collect::<String>()
+}
diff --git a/challenge-279/roger-bell-west/rust/ch-2.rs b/challenge-279/roger-bell-west/rust/ch-2.rs
new file mode 100755
index 0000000000..6fd77fae0d
--- /dev/null
+++ b/challenge-279/roger-bell-west/rust/ch-2.rs
@@ -0,0 +1,28 @@
+#! /bin/sh
+//usr/bin/env rustc --test $0 -o ${0}x && ./${0}x --nocapture; rm -f ${0}x ; exit
+
+#[test]
+fn test_ex1() {
+    assert_eq!(splitstring("perl"), false);
+}
+
+#[test]
+fn test_ex2() {
+    assert_eq!(splitstring("book"), true);
+}
+
+#[test]
+fn test_ex3() {
+    assert_eq!(splitstring("goodmorning"), true);
+}
+
+fn splitstring(a: &str) -> bool {
+    let mut n = 0;
+    for cc in a.chars() {
+        n += match cc.to_ascii_lowercase() {
+            'a' | 'e' | 'i' | 'o' | 'u' => 1,
+            _ => 0,
+        }
+    }
+    n % 2 == 0
+}
diff --git a/challenge-279/roger-bell-west/scala/ch-1.scala b/challenge-279/roger-bell-west/scala/ch-1.scala
new file mode 100644
index 0000000000..72c5330af8
--- /dev/null
+++ b/challenge-279/roger-bell-west/scala/ch-1.scala
@@ -0,0 +1,32 @@
+import scala.collection.mutable.ListBuffer
+
+object Sortletters {
+  def sortletters(a: List[Char], c: List[Int]): String = {
+    var out = ListBuffer.fill(a.length)('x')
+    for ((ch, i) <- a.zipWithIndex) {
+      out(c(i) - 1) = ch
+    }
+    out.mkString("")
+  }
+  def main(args: Array[String]) {
+    if (sortletters(List('R', 'E', 'P', 'L'), List(3, 2, 1, 4)) == "PERL") {
+      print("Pass")
+    } else {
+      print("Fail")
+    }
+    print(" ")
+    if (sortletters(List('A', 'U', 'R', 'K'), List(2, 4, 1, 3)) == "RAKU") {
+      print("Pass")
+    } else {
+      print("Fail")
+    }
+    print(" ")
+    if (sortletters(List('O', 'H', 'Y', 'N', 'P', 'T'), List(5, 4, 2, 6, 1, 3)) == "PYTHON") {
+      print("Pass")
+    } else {
+      print("Fail")
+    }
+    println("")
+
+  }
+}
diff --git a/challenge-279/roger-bell-west/scala/ch-2.scala b/challenge-279/roger-bell-west/scala/ch-2.scala
new file mode 100644
index 0000000000..1f6e88314f
--- /dev/null
+++ b/challenge-279/roger-bell-west/scala/ch-2.scala
@@ -0,0 +1,34 @@
+
+object Splitstring {
+  def splitstring(a: String): Boolean = {
+    var n = 0
+    for (cc <- a.toList) {
+      cc.toLower match {
+        case 'a' | 'e' | 'i' | 'o' | 'u' => { n += 1 }
+        case _ => { }
+      }
+    }
+    n % 2 == 0
+  }
+  def main(args: Array[String]) {
+    if (!splitstring("perl")) {
+      print("Pass")
+    } else {
+      print("Fail")
+    }
+    print(" ")
+    if (splitstring("book")) {
+      print("Pass")
+    } else {
+      print("Fail")
+    }
+    print(" ")
+    if (splitstring("goodmorning")) {
+      print("Pass")
+    } else {
+      print("Fail")
+    }
+    println("")
+
+  }
+}
diff --git a/challenge-279/roger-bell-west/tests.json b/challenge-279/roger-bell-west/tests.json
new file mode 100644
index 0000000000..77b3593172
--- /dev/null
+++ b/challenge-279/roger-bell-west/tests.json
@@ -0,0 +1,44 @@
+{
+    "ch-1" : [
+        {
+            "function" : "sortletters",
+            "multiarg" : true,
+            "arguments" : [
+                [ "R", "E", "P", "L" ],
+                [ 3, 2, 1, 4 ]
+            ],
+            "result" : "PERL"
+        },
+        {
+            "multiarg" : true,
+            "arguments" : [
+                [ "A", "U", "R", "K" ],
+                [ 2, 4, 1, 3 ]
+            ],
+            "result" : "RAKU"
+        },
+        {
+            "multiarg" : true,
+            "arguments" : [
+                [ "O", "H", "Y", "N", "P", "T" ],
+                [ 5, 4, 2, 6, 1, 3 ]
+            ],
+            "result" : "PYTHON"
+        }
+    ],
+    "ch-2" : [
+        {
+            "function" : "splitstring",
+            "arguments" : "perl",
+            "result" : false
+        },
+        {
+            "arguments" : "book",
+            "result" : true
+        },
+        {
+            "arguments" : "goodmorning",
+            "result" : true
+        }
+    ]
+}