Merge pull request #12730 from Firedrake/rogerbw-challenge-340

RogerBW solutions for challenge no. 340

25 files changed, 1138 insertions, 0 deletions

diff --git a/challenge-340/roger-bell-west/crystal/ch-1.cr b/challenge-340/roger-bell-west/crystal/ch-1.cr
new file mode 100755
index 0000000000..59e3857a66
--- /dev/null
+++ b/challenge-340/roger-bell-west/crystal/ch-1.cr
@@ -0,0 +1,32 @@
+#! /usr/bin/crystal
+
+def duplicateremovals(a)
+  b = Array(Char).new
+  a.chars.each do |c|
+    if b.size == 0 || c != b[-1]
+      b.push(c)
+    else
+      b.pop
+    end
+  end
+  b.join("")
+end
+
+require "spec"
+describe "duplicateremovals" do
+  it "test_ex1" do
+    duplicateremovals("abbaca").should eq "ca"
+  end
+  it "test_ex2" do
+    duplicateremovals("azxxzy").should eq "ay"
+  end
+  it "test_ex3" do
+    duplicateremovals("aaaaaaaa").should eq ""
+  end
+  it "test_ex4" do
+    duplicateremovals("aabccba").should eq "a"
+  end
+  it "test_ex5" do
+    duplicateremovals("abcddcba").should eq ""
+  end
+end
diff --git a/challenge-340/roger-bell-west/crystal/ch-2.cr b/challenge-340/roger-bell-west/crystal/ch-2.cr
new file mode 100755
index 0000000000..ca5ee60de4
--- /dev/null
+++ b/challenge-340/roger-bell-west/crystal/ch-2.cr
@@ -0,0 +1,34 @@
+#! /usr/bin/crystal
+
+def ascendingnumbers(a)
+  prev = nil
+  a.split(" ").each do |c|
+    n = c.to_i?
+    if !n.nil?
+      if !prev.nil? && prev >= n
+        return false
+      end
+      prev = n
+    end
+  end
+  true
+end
+
+require "spec"
+describe "ascendingnumbers" do
+  it "test_ex1" do
+    ascendingnumbers("The cat has 3 kittens 7 toys 10 beds").should eq true
+  end
+  it "test_ex2" do
+    ascendingnumbers("Alice bought 5 apples 2 oranges 9 bananas").should eq false
+  end
+  it "test_ex3" do
+    ascendingnumbers("I ran 1 mile 2 days 3 weeks 4 months").should eq true
+  end
+  it "test_ex4" do
+    ascendingnumbers("Bob has 10 cars 10 bikes").should eq false
+  end
+  it "test_ex5" do
+    ascendingnumbers("Zero is 0 one is 1 two is 2").should eq true
+  end
+end
diff --git a/challenge-340/roger-bell-west/javascript/ch-1.js b/challenge-340/roger-bell-west/javascript/ch-1.js
new file mode 100755
index 0000000000..7ee4dd80e9
--- /dev/null
+++ b/challenge-340/roger-bell-west/javascript/ch-1.js
@@ -0,0 +1,46 @@
+#! /usr/bin/node
+
+"use strict"
+
+function duplicateremovals(a) {
+    var b = [];
+    for (let c of a.split("")) {
+        if (b.length == 0 || c != b[b.length - 1]) {
+            b.push(c);
+        } else {
+            b.pop();
+        }
+    }
+    return b.join("");
+}
+
+if (duplicateremovals('abbaca') == 'ca') {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (duplicateremovals('azxxzy') == 'ay') {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (duplicateremovals('aaaaaaaa') == '') {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (duplicateremovals('aabccba') == 'a') {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (duplicateremovals('abcddcba') == '') {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write("\n");
diff --git a/challenge-340/roger-bell-west/javascript/ch-2.js b/challenge-340/roger-bell-west/javascript/ch-2.js
new file mode 100755
index 0000000000..b61f6b9748
--- /dev/null
+++ b/challenge-340/roger-bell-west/javascript/ch-2.js
@@ -0,0 +1,48 @@
+#! /usr/bin/node
+
+"use strict"
+
+function ascendingnumbers(a) {
+    let prev = null;
+    for (let c of a.split(" ")) {
+        let n = parseInt(c, 10);
+        if (!isNaN(n)) {
+            if (prev !== null && prev >= n) {
+                return false;
+            }
+            prev = n;
+        }
+    }
+    return true;
+}
+
+if (ascendingnumbers('The cat has 3 kittens 7 toys 10 beds')) {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (!ascendingnumbers('Alice bought 5 apples 2 oranges 9 bananas')) {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (ascendingnumbers('I ran 1 mile 2 days 3 weeks 4 months')) {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (!ascendingnumbers('Bob has 10 cars 10 bikes')) {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+if (ascendingnumbers('Zero is 0 one is 1 two is 2')) {
+  process.stdout.write("Pass");
+} else {
+  process.stdout.write("FAIL");
+}
+process.stdout.write("\n");
diff --git a/challenge-340/roger-bell-west/kotlin/ch-1.kt b/challenge-340/roger-bell-west/kotlin/ch-1.kt
new file mode 100644
index 0000000000..ed18b5d961
--- /dev/null
+++ b/challenge-340/roger-bell-west/kotlin/ch-1.kt
@@ -0,0 +1,46 @@
+fun duplicateremovals(a: String): String {
+    var b = ArrayList<Char>()
+    for (c in a.toCharArray()) {
+        if (b.size == 0 || c != b[b.size - 1]) {
+            b.add(c)
+        } else {
+            b = ArrayList(b.dropLast(1))
+        }
+    }
+    return b.joinToString("")
+}
+
+fun main() {
+
+    if (duplicateremovals("abbaca") == "ca") {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (duplicateremovals("azxxzy") == "ay") {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (duplicateremovals("aaaaaaaa") == "") {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (duplicateremovals("aabccba") == "a") {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (duplicateremovals("abcddcba") == "") {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    println("")
+
+}
diff --git a/challenge-340/roger-bell-west/kotlin/ch-2.kt b/challenge-340/roger-bell-west/kotlin/ch-2.kt
new file mode 100644
index 0000000000..5069f93319
--- /dev/null
+++ b/challenge-340/roger-bell-west/kotlin/ch-2.kt
@@ -0,0 +1,48 @@
+fun ascendingnumbers(a: String): Boolean {
+    var prev: Int? = null
+    for (c in a.split(" ")) {
+        val n = c.toIntOrNull()
+        if (n != null) {
+            if (prev != null && prev >= n) {
+                return false
+            }
+            prev = n
+        }
+    }
+    return true
+}
+
+fun main() {
+
+    if (ascendingnumbers("The cat has 3 kittens 7 toys 10 beds")) {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (!ascendingnumbers("Alice bought 5 apples 2 oranges 9 bananas")) {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (ascendingnumbers("I ran 1 mile 2 days 3 weeks 4 months")) {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (!ascendingnumbers("Bob has 10 cars 10 bikes")) {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    print(" ")
+    if (ascendingnumbers("Zero is 0 one is 1 two is 2")) {
+        print("Pass")
+    } else {
+        print("Fail")
+    }
+    println("")
+
+}
diff --git a/challenge-340/roger-bell-west/lua/ch-1.lua b/challenge-340/roger-bell-west/lua/ch-1.lua
new file mode 100755
index 0000000000..360f4fa318
--- /dev/null
+++ b/challenge-340/roger-bell-west/lua/ch-1.lua
@@ -0,0 +1,68 @@
+#! /usr/bin/lua
+
+function split(t)
+   local cl = {}
+   string.gsub(t,
+               "(.)",
+               function(c)
+                  table.insert(cl, c)
+               end
+   )
+   return cl
+end
+
+function join(t)
+   local out=""
+   for i, v in ipairs(t) do
+      out = out .. v
+   end
+   return out
+end
+
+function duplicateremovals(a)
+   local b = {}
+   for _, c in ipairs(split(a)) do
+      if #b == 0 or c ~= b[#b] then
+         table.insert(b, c)
+      else
+         table.remove(b, #b)
+      end
+   end
+   return join(b)
+end
+
+if duplicateremovals("abbaca") == "ca" then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if duplicateremovals("azxxzy") == "ay" then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if duplicateremovals("aaaaaaaa") == "" then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if duplicateremovals("aabccba") == "a" then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if duplicateremovals("abcddcba") == "" then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+print("")
+
diff --git a/challenge-340/roger-bell-west/lua/ch-2.lua b/challenge-340/roger-bell-west/lua/ch-2.lua
new file mode 100755
index 0000000000..0f34e7a0aa
--- /dev/null
+++ b/challenge-340/roger-bell-west/lua/ch-2.lua
@@ -0,0 +1,79 @@
+#! /usr/bin/lua
+
+function splits(inputstr, sep)
+   sep = sep or '%s'
+   local starts = {1}
+   local ends = {}
+   local n = 1
+   while true do
+      local fs, fe = string.find(inputstr, sep, n)
+      if fs == nil then
+         break
+      end
+      table.insert(ends, fs - 1)
+      table.insert(starts, fe + 1)
+      n = fe + 1
+   end
+   table.insert(ends, #inputstr)
+   local t = {}
+   for i = 1, #starts do
+      local s = starts[i]
+      local e = ends[i]
+      if e >= s then
+         table.insert(t, string.sub(inputstr, s, e))
+      end
+   end
+   return t
+end
+
+function ascendingnumbers(a)
+   local prev = nil
+   for _, c in ipairs(splits(a, " ")) do
+      local n = tonumber(c)
+      if type(n) ~= "nil" then
+         if type(prev) ~= "nil" then
+            if prev >= n then
+               return false
+            end
+         end
+         prev = n
+      end
+   end
+   return true
+end
+
+if ascendingnumbers("The cat has 3 kittens 7 toys 10 beds") then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if not ascendingnumbers("Alice bought 5 apples 2 oranges 9 bananas") then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if ascendingnumbers("I ran 1 mile 2 days 3 weeks 4 months") then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if not ascendingnumbers("Bob has 10 cars 10 bikes") then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if ascendingnumbers("Zero is 0 one is 1 two is 2") then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+print("")
+
diff --git a/challenge-340/roger-bell-west/perl/ch-1.pl b/challenge-340/roger-bell-west/perl/ch-1.pl
new file mode 100755
index 0000000000..e258669dd1
--- /dev/null
+++ b/challenge-340/roger-bell-west/perl/ch-1.pl
@@ -0,0 +1,25 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+use experimental 'signatures';
+
+use Test::More tests => 5;
+
+is(duplicateremovals('abbaca'), 'ca', 'example 1');
+is(duplicateremovals('azxxzy'), 'ay', 'example 2');
+is(duplicateremovals('aaaaaaaa'), '', 'example 3');
+is(duplicateremovals('aabccba'), 'a', 'example 4');
+is(duplicateremovals('abcddcba'), '', 'example 5');
+
+sub duplicateremovals($a) {
+  my @b;
+  foreach my $c (split '', $a) {
+    if (scalar @b == 0 || $c ne $b[-1]) {
+      push @b, $c;
+    } else {
+      pop @b;
+    }
+  }
+  join('', @b);
+}
diff --git a/challenge-340/roger-bell-west/perl/ch-2.pl b/challenge-340/roger-bell-west/perl/ch-2.pl
new file mode 100755
index 0000000000..bafca33fc3
--- /dev/null
+++ b/challenge-340/roger-bell-west/perl/ch-2.pl
@@ -0,0 +1,26 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+use experimental 'signatures';
+
+use Test::More tests => 5;
+
+is(ascendingnumbers('The cat has 3 kittens 7 toys 10 beds'), 1, 'example 1');
+is(ascendingnumbers('Alice bought 5 apples 2 oranges 9 bananas'), 0, 'example 2');
+is(ascendingnumbers('I ran 1 mile 2 days 3 weeks 4 months'), 1, 'example 3');
+is(ascendingnumbers('Bob has 10 cars 10 bikes'), 0, 'example 4');
+is(ascendingnumbers('Zero is 0 one is 1 two is 2'), 1, 'example 5');
+
+sub ascendingnumbers($a) {
+  my $prev = undef;
+  foreach my $c (split ' ', $a) {
+    if ($c =~ /^[0-9]+$/) {
+      if (defined $prev && $prev >= $c) {
+        return 0;
+      }
+      $prev = $c;
+    }
+  }
+  1;
+}
diff --git a/challenge-340/roger-bell-west/postscript/ch-1.ps b/challenge-340/roger-bell-west/postscript/ch-1.ps
new file mode 100644
index 0000000000..f13e8344c1
--- /dev/null
+++ b/challenge-340/roger-bell-west/postscript/ch-1.ps
@@ -0,0 +1,73 @@
+%!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.start {
+    print (:) print
+    /test.pass 0 def
+    /test.count 0 def
+} 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
+
+/s2a {
+    [ exch { } forall ]
+} 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
+
+
+% end included library code
+
+/duplicateremovals {
+    s2a
+    [ exch
+      {
+          counttomark 0 gt
+          3 copy pop eq and {
+              pop pop
+          } if
+      } forall
+    ]
+    a2s
+} bind def
+
+(duplicateremovals) test.start
+(abbaca) duplicateremovals (ca) eq test
+(azxxzy) duplicateremovals (ay) eq test
+(aaaaaaaa) duplicateremovals () eq test
+(aabccba) duplicateremovals (a) eq test
+(abcddcba) duplicateremovals () eq test
+test.end
diff --git a/challenge-340/roger-bell-west/postscript/ch-2.ps b/challenge-340/roger-bell-west/postscript/ch-2.ps
new file mode 100644
index 0000000000..b158ca91d8
--- /dev/null
+++ b/challenge-340/roger-bell-west/postscript/ch-2.ps
@@ -0,0 +1,96 @@
+%!PS
+
+% begin included library code
+% see https://codeberg.org/Firedrake/postscript-libraries/
+/test.start {
+    print (:) print
+    /test.pass 0 def
+    /test.count 0 def
+} bind def
+
+/strsplit % (ajbjc) (j) -> [ (a) (b) (c) ]
+{
+    1 dict begin
+    /sep exch def
+    [ exch
+      {
+          dup length 0 eq {
+              pop
+              exit
+          } {
+              sep search {
+                  exch pop
+                  dup length 0 eq {
+                      pop
+                  } {
+                      exch
+                  } ifelse
+              } {
+                  ()
+              } ifelse
+          } ifelse
+      } loop
+    ]
+    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
+
+/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
+
+
+% end included library code
+
+/ascendingnumbers {
+    0 dict begin
+    /first true def
+    /prev 0 def
+    true exch
+    ( ) strsplit {
+        {
+            cvi
+        } stopped {
+            pop
+        } {
+            /n exch def
+            first not {
+                prev n ge {
+                    pop false
+                    exit
+                } if
+            } if
+            /first false def
+            /prev n def
+        } ifelse
+    } forall
+    end
+} bind def
+
+(ascendingnumbers) test.start
+(The cat has 3 kittens 7 toys 10 beds) ascendingnumbers test
+(Alice bought 5 apples 2 oranges 9 bananas) ascendingnumbers not test
+(I ran 1 mile 2 days 3 weeks 4 months) ascendingnumbers test
+(Bob has 10 cars 10 bikes) ascendingnumbers not test
+(Zero is 0 one is 1 two is 2) ascendingnumbers test
+test.end
diff --git a/challenge-340/roger-bell-west/python/ch-1.py b/challenge-340/roger-bell-west/python/ch-1.py
new file mode 100755
index 0000000000..6d8b329a40
--- /dev/null
+++ b/challenge-340/roger-bell-west/python/ch-1.py
@@ -0,0 +1,31 @@
+#! /usr/bin/python3
+
+def duplicateremovals(a):
+  b = []
+  for c in a:
+    if len(b) == 0 or c != b[-1]:
+      b.append(c)
+    else:
+      b.pop()
+  return ''.join(b)
+
+import unittest
+
+class TestDuplicateremovals(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(duplicateremovals("abbaca"), "ca", 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(duplicateremovals("azxxzy"), "ay", 'example 2')
+
+  def test_ex3(self):
+    self.assertEqual(duplicateremovals("aaaaaaaa"), "", 'example 3')
+
+  def test_ex4(self):
+    self.assertEqual(duplicateremovals("aabccba"), "a", 'example 4')
+
+  def test_ex5(self):
+    self.assertEqual(duplicateremovals("abcddcba"), "", 'example 5')
+
+unittest.main()
diff --git a/challenge-340/roger-bell-west/python/ch-2.py b/challenge-340/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..ddf9aa6280
--- /dev/null
+++ b/challenge-340/roger-bell-west/python/ch-2.py
@@ -0,0 +1,34 @@
+#! /usr/bin/python3
+
+def ascendingnumbers(a):
+  prev = None
+  for c in a.split(" "):
+    try:
+      n = int(c)
+      if prev is not None and prev >= n:
+        return False
+      prev = n
+    except ValueError:
+      None
+  return True
+  
+import unittest
+
+class TestAscendingnumbers(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(ascendingnumbers("The cat has 3 kittens 7 toys 10 beds"), True, 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(ascendingnumbers("Alice bought 5 apples 2 oranges 9 bananas"), False, 'example 2')
+
+  def test_ex3(self):
+    self.assertEqual(ascendingnumbers("I ran 1 mile 2 days 3 weeks 4 months"), True, 'example 3')
+
+  def test_ex4(self):
+    self.assertEqual(ascendingnumbers("Bob has 10 cars 10 bikes"), False, 'example 4')
+
+  def test_ex5(self):
+    self.assertEqual(ascendingnumbers("Zero is 0 one is 1 two is 2"), True, 'example 5')
+
+unittest.main()
diff --git a/challenge-340/roger-bell-west/raku/ch-1.p6 b/challenge-340/roger-bell-west/raku/ch-1.p6
new file mode 100755
index 0000000000..1e42ce3ecd
--- /dev/null
+++ b/challenge-340/roger-bell-west/raku/ch-1.p6
@@ -0,0 +1,23 @@
+#! /usr/bin/raku
+
+use Test;
+
+plan 5;
+
+is(duplicateremovals('abbaca'), 'ca', 'example 1');
+is(duplicateremovals('azxxzy'), 'ay', 'example 2');
+is(duplicateremovals('aaaaaaaa'), '', 'example 3');
+is(duplicateremovals('aabccba'), 'a', 'example 4');
+is(duplicateremovals('abcddcba'), '', 'example 5');
+
+sub duplicateremovals($a) {
+  my @b;
+  for $a.comb -> $c {
+    if (@b.elems == 0 || $c ne @b[*-1]) {
+      @b.push($c);
+    } else {
+      @b.pop;
+    }
+  }
+  join('', @b);
+}
diff --git a/challenge-340/roger-bell-west/raku/ch-2.p6 b/challenge-340/roger-bell-west/raku/ch-2.p6
new file mode 100755
index 0000000000..aae213c679
--- /dev/null
+++ b/challenge-340/roger-bell-west/raku/ch-2.p6
@@ -0,0 +1,26 @@
+#! /usr/bin/raku
+
+use Test;
+
+plan 5;
+
+is(ascendingnumbers('The cat has 3 kittens 7 toys 10 beds'), True, 'example 1');
+is(ascendingnumbers('Alice bought 5 apples 2 oranges 9 bananas'), False, 'example 2');
+is(ascendingnumbers('I ran 1 mile 2 days 3 weeks 4 months'), True, 'example 3');
+is(ascendingnumbers('Bob has 10 cars 10 bikes'), False, 'example 4');
+is(ascendingnumbers('Zero is 0 one is 1 two is 2'), True, 'example 5');
+
+sub ascendingnumbers($a) {
+    my $prev = Nil;
+    for $a.split(' ') -> $c {
+        if ($c ~~ /^<[0..9]>+$/) {
+            with $prev {
+                if ($prev >= $c) {
+                    return False;
+                }
+            }
+            $prev = $c;
+        }
+    }
+    True;
+}
diff --git a/challenge-340/roger-bell-west/ruby/ch-1.rb b/challenge-340/roger-bell-west/ruby/ch-1.rb
new file mode 100755
index 0000000000..3ac24450e3
--- /dev/null
+++ b/challenge-340/roger-bell-west/ruby/ch-1.rb
@@ -0,0 +1,39 @@
+#! /usr/bin/ruby
+
+def duplicateremovals(a)
+  b = Array.new
+  a.chars.each do |c|
+    if b.size == 0 || c != b[-1]
+      b.push(c)
+    else
+      b.pop
+    end
+  end
+  b.join("")
+end
+
+require 'test/unit'
+
+class TestDuplicateremovals < Test::Unit::TestCase
+
+  def test_ex1
+    assert_equal('ca', duplicateremovals('abbaca'))
+  end
+
+  def test_ex2
+    assert_equal('ay', duplicateremovals('azxxzy'))
+  end
+
+  def test_ex3
+    assert_equal('', duplicateremovals('aaaaaaaa'))
+  end
+
+  def test_ex4
+    assert_equal('a', duplicateremovals('aabccba'))
+  end
+
+  def test_ex5
+    assert_equal('', duplicateremovals('abcddcba'))
+  end
+
+end
diff --git a/challenge-340/roger-bell-west/ruby/ch-2.rb b/challenge-340/roger-bell-west/ruby/ch-2.rb
new file mode 100755
index 0000000000..9b511533d3
--- /dev/null
+++ b/challenge-340/roger-bell-west/ruby/ch-2.rb
@@ -0,0 +1,42 @@
+#! /usr/bin/ruby
+
+def ascendingnumbers(a)
+  np = Regexp.new("^[0-9]+$")
+  prev = nil
+  a.split(" ").each do |c|
+    if c =~ np
+      n = c.to_i
+      if !prev.nil? && prev >= n
+        return false
+      end
+      prev = n
+    end
+  end
+  true
+end
+
+require 'test/unit'
+
+class TestAscendingnumbers < Test::Unit::TestCase
+
+  def test_ex1
+    assert_equal(true, ascendingnumbers('The cat has 3 kittens 7 toys 10 beds'))
+  end
+
+  def test_ex2
+    assert_equal(false, ascendingnumbers('Alice bought 5 apples 2 oranges 9 bananas'))
+  end
+
+  def test_ex3
+    assert_equal(true, ascendingnumbers('I ran 1 mile 2 days 3 weeks 4 months'))
+  end
+
+  def test_ex4
+    assert_equal(false, ascendingnumbers('Bob has 10 cars 10 bikes'))
+  end
+
+  def test_ex5
+    assert_equal(true, ascendingnumbers('Zero is 0 one is 1 two is 2'))
+  end
+
+end
diff --git a/challenge-340/roger-bell-west/rust/ch-1.rs b/challenge-340/roger-bell-west/rust/ch-1.rs
new file mode 100755
index 0000000000..cad2bf2a69
--- /dev/null
+++ b/challenge-340/roger-bell-west/rust/ch-1.rs
@@ -0,0 +1,39 @@
+#! /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!(duplicateremovals("abbaca"), "ca");
+}
+
+#[test]
+fn test_ex2() {
+    assert_eq!(duplicateremovals("azxxzy"), "ay");
+}
+
+#[test]
+fn test_ex3() {
+    assert_eq!(duplicateremovals("aaaaaaaa"), "");
+}
+
+#[test]
+fn test_ex4() {
+    assert_eq!(duplicateremovals("aabccba"), "a");
+}
+
+#[test]
+fn test_ex5() {
+    assert_eq!(duplicateremovals("abcddcba"), "");
+}
+
+fn duplicateremovals(a: &str) -> String {
+    let mut b = Vec::new();
+    for c in a.chars() {
+        if b.len() == 0 || c != b[b.len() - 1] {
+            b.push(c);
+        } else {
+            b.pop();
+        }
+    }
+    b.into_iter().collect()
+}
diff --git a/challenge-340/roger-bell-west/rust/ch-2.rs b/challenge-340/roger-bell-west/rust/ch-2.rs
new file mode 100755
index 0000000000..cf5fd6d4fe
--- /dev/null
+++ b/challenge-340/roger-bell-west/rust/ch-2.rs
@@ -0,0 +1,43 @@
+#! /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!(ascendingnumbers("The cat has 3 kittens 7 toys 10 beds"), true);
+}
+
+#[test]
+fn test_ex2() {
+    assert_eq!(
+        ascendingnumbers("Alice bought 5 apples 2 oranges 9 bananas"),