Add tasks for all the new languages

Task/Jensens-Device/Nim/jensens-device.nim

@@ -0,0 +1,9 @@
+var i: int
+
+proc harmonicSum(i: var int, lo, hi, term): float =
+  i = lo
+  while i <= hi:
+    result += term()
+    inc i
+
+echo harmonicSum(i, 1, 100, proc: float = 1.0 / float(i))

Task/Jensens-Device/Oforth/jensens-device.oforth

@@ -0,0 +1 @@
+: mysum(lo, hi, term)  | i | 0 lo hi for: i [ i term perform + ] ;

Task/Jensens-Device/Sidef/jensens-device.sidef

@@ -0,0 +1,9 @@
+var i;
+func sum (i, lo, hi, term) {
+    var temp = 0;
+    for (*i = lo; *i <= hi; (*i)++) {
+        temp += term.run;
+    };
+    return temp;
+};
+say sum(\i, 1, 100, { 1 / i });

Task/Jensens-Device/Swift/jensens-device.swift

@@ -0,0 +1,11 @@
+var i = 42 // initial value doesn't matter
+
+func sum(inout i: Int, lo: Int, hi: Int, @autoclosure term: () -> Double) -> Double {
+  var result = 0.0
+  for i = lo; i <= hi; i++ {
+    result += term()
+  }
+  return result
+}
+
+println(sum(&i, 1, 100, 1 / Double(i)))

Task/Jensens-Device/jq/jensens-device.jq

@@ -0,0 +1,5 @@
+def sum(lo; hi; term):
+  reduce range(lo; hi+1) as $i (0; . + ($i|term));
+
+# The task:
+sum(1;100;1/.)