first commit

node_modules/cyclist/index.js

@@ -0,0 +1,35 @@
+/* eslint-disable no-var */
+
+function Cyclist (size) {
+  if (!(this instanceof Cyclist)) return new Cyclist(size)
+  size = twoify(size)
+  this.mask = size - 1
+  this.size = size
+  this.values = new Array(size)
+}
+
+Cyclist.prototype.put = function (index, val) {
+  var pos = index & this.mask
+  this.values[pos] = val
+  return pos
+}
+
+Cyclist.prototype.get = function (index) {
+  return this.values[index & this.mask]
+}
+
+Cyclist.prototype.del = function (index) {
+  var pos = index & this.mask
+  var val = this.values[pos]
+  this.values[pos] = undefined
+  return val
+}
+
+module.exports = Cyclist
+
+function twoify (n) {
+  if (n && !(n & (n - 1))) return n
+  var p = 1
+  while (p < n) p <<= 1
+  return p
+}