CDE

Task/Count-the-coins/JavaScript/count-the-coins-1.js

@@ -0,0 +1,19 @@
+function countcoins(t, o) {
+	'use strict';
+	var targetsLength = t + 1;
+	var operandsLength = o.length;
+	t = [1];
+
+	for (var a = 0; a < operandsLength; a ++) {
+		for (var b = 1; b < targetsLength; b ++) {
+
+			// initialise undefined target
+			t[b] = t[b] ? t[b] : 0;
+
+			// accumulate target + operand ways
+			t[b] += (b < o[a]) ? 0 : t[b - o[a]];
+		}
+	}
+
+	return t[targetsLength - 1];
+}

Task/Count-the-coins/JavaScript/count-the-coins-2.js

@@ -0,0 +1,2 @@
+countcoins(100, [1,5,10,25]);
+242

Task/Count-the-coins/JavaScript/count-the-coins-3.js

@@ -0,0 +1,25 @@
+function countcoins(t, o) {
+	'use strict';
+	var operandsLength = o.length;
+	var solutions = 0;
+
+	function permutate(a, x) {
+
+		// base case
+		if (a === t) {
+			solutions ++;
+		}
+
+		// recursive case
+		else if (a < t) {
+			for (var i = 0; i < operandsLength; i ++) {
+				if (i >= x) {
+					permutate(o[i] + a, i);
+				}
+			}
+		}
+	}
+
+	permutate(0, 0);
+	return solutions;
+}

Task/Count-the-coins/JavaScript/count-the-coins-4.js

@@ -0,0 +1,2 @@
+countcoins(100, [1,5,10,25]);
+242