- Added guest contributions by Laurent Rosenfeld.

4 files changed, 79 insertions, 0 deletions

diff --git a/challenge-179/laurent-rosenfeld/julia/ch-2.jl b/challenge-179/laurent-rosenfeld/julia/ch-2.jl
new file mode 100644
index 0000000000..fb24b765a9
--- /dev/null
+++ b/challenge-179/laurent-rosenfeld/julia/ch-2.jl
@@ -0,0 +1,19 @@
+function sparkline(test)
+    bars = '\u2581':'\u2588'
+    bar_count = length(bars)
+    min, max = extrema(test)
+    out = ""
+    for item in test
+        h = 1 + bar_count * (item - min) / (max - min)
+        h > bar_count && (h = bar_count)
+        out = out * string(bars[Int(floor(h))])
+    end
+    return out * "\n"
+end
+
+tests = [ [2, 4, 6, 8, 10, 12, 10, 8, 6, 4, 2],
+    [0, 1, 19, 20], [0, 999, 4000, 4999, 7000, 7999] ]
+for test in tests
+    println(test, "\n")
+    println( sparkline(test))
+end
diff --git a/challenge-179/laurent-rosenfeld/python/ch-2.py b/challenge-179/laurent-rosenfeld/python/ch-2.py
new file mode 100644
index 0000000000..2f252f01f3
--- /dev/null
+++ b/challenge-179/laurent-rosenfeld/python/ch-2.py
@@ -0,0 +1,17 @@
+def sparkline(test):
+  bars = [chr(bar) for bar in range(9601, 9608+1)]
+  minim = min(test)
+  maxim = max(test)
+  scale = maxim - minim
+  length = len(bars)
+  line = ""
+  for item in test:
+    line += bars[min(int((item-minim) / scale * length), length - 1)]
+  return line
+
+tests = [ [2, 4, 6, 8, 10, 12, 10, 8, 6, 4, 2], \
+  [0, 1, 19, 20], [0, 999, 4000, 4999, 7000, 7999] ]
+
+for test in tests:
+  print(test)
+  print(sparkline(test), "\n")
diff --git a/challenge-179/laurent-rosenfeld/ruby/ch-2.rb b/challenge-179/laurent-rosenfeld/ruby/ch-2.rb
new file mode 100644
index 0000000000..e53778cf2f
--- /dev/null
+++ b/challenge-179/laurent-rosenfeld/ruby/ch-2.rb
@@ -0,0 +1,19 @@
+bars = ('▁'..'█').to_a
+tests = [ [1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1],
+    [0, 1, 19, 20], [0, 999, 4000, 4999, 7000, 7999] ]
+for test in tests
+    min, max = test.minmax
+    puts test.join(" ")
+    puts "min: %.2f; max: %.2f"% [min, max]
+    scale = (max - min) / (bars.size - 1)
+    line = ""
+    for item in test
+        h = bars.size * (item - min) / (max - min)
+        if h >= bars.size
+            h = bars.size - 1
+        end
+        line += bars[h]
+    end
+    puts line
+    puts " "
+end
diff --git a/challenge-179/laurent-rosenfeld/scala/ch-2.scala b/challenge-179/laurent-rosenfeld/scala/ch-2.scala
new file mode 100644
index 0000000000..c03b3c2fed
--- /dev/null
+++ b/challenge-179/laurent-rosenfeld/scala/ch-2.scala
@@ -0,0 +1,24 @@
+object sparkLine extends App {
+
+  def sparkline(test: Array[Int]): String = {
+    val bars = ('\u2581' to '\u2588')
+    var outl = ""
+    for (item <- test) {
+      var h = bars.length * (item - test.min) / (test.max - test.min)
+      if (h >= bars.length) { h = bars.length - 1 }
+      outl = outl + bars(h)
+    }
+    return outl
+  }
+  val tests = Array(
+    Array(1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1),
+    Array(0, 1, 19, 20),
+    Array(0, 999, 4000, 4999, 7000, 7999)
+  )
+  for (test <- tests) {
+    println(test.mkString(" "))
+    println("")
+    println(sparkline(test))
+    println("")
+  }
+}