renamed graphics-element dir

docs/js/graphics-element/api/util/binomial.js

@@ -0,0 +1,21 @@
+var binomialCoefficients = [[1], [1, 1]];
+
+/**
+ * ... docs go here ...
+ */
+function binomial(n, k) {
+  if (n === 0) return 1;
+  var lut = binomialCoefficients;
+  while (n >= lut.length) {
+    var s = lut.length;
+    var nextRow = [1];
+    for (var i = 1, prev = s - 1; i < s; i++) {
+      nextRow[i] = lut[prev][i - 1] + lut[prev][i];
+    }
+    nextRow[s] = 1;
+    lut.push(nextRow);
+  }
+  return lut[n][k];
+}
+
+export default binomial;