* first action! (#1)

node_modules/pseudomap/pseudomap.js

@@ -0,0 +1,113 @@
+var hasOwnProperty = Object.prototype.hasOwnProperty
+
+module.exports = PseudoMap
+
+function PseudoMap (set) {
+  if (!(this instanceof PseudoMap)) // whyyyyyyy
+    throw new TypeError("Constructor PseudoMap requires 'new'")
+
+  this.clear()
+
+  if (set) {
+    if ((set instanceof PseudoMap) ||
+        (typeof Map === 'function' && set instanceof Map))
+      set.forEach(function (value, key) {
+        this.set(key, value)
+      }, this)
+    else if (Array.isArray(set))
+      set.forEach(function (kv) {
+        this.set(kv[0], kv[1])
+      }, this)
+    else
+      throw new TypeError('invalid argument')
+  }
+}
+
+PseudoMap.prototype.forEach = function (fn, thisp) {
+  thisp = thisp || this
+  Object.keys(this._data).forEach(function (k) {
+    if (k !== 'size')
+      fn.call(thisp, this._data[k].value, this._data[k].key)
+  }, this)
+}
+
+PseudoMap.prototype.has = function (k) {
+  return !!find(this._data, k)
+}
+
+PseudoMap.prototype.get = function (k) {
+  var res = find(this._data, k)
+  return res && res.value
+}
+
+PseudoMap.prototype.set = function (k, v) {
+  set(this._data, k, v)
+}
+
+PseudoMap.prototype.delete = function (k) {
+  var res = find(this._data, k)
+  if (res) {
+    delete this._data[res._index]
+    this._data.size--
+  }
+}
+
+PseudoMap.prototype.clear = function () {
+  var data = Object.create(null)
+  data.size = 0
+
+  Object.defineProperty(this, '_data', {
+    value: data,
+    enumerable: false,
+    configurable: true,
+    writable: false
+  })
+}
+
+Object.defineProperty(PseudoMap.prototype, 'size', {
+  get: function () {
+    return this._data.size
+  },
+  set: function (n) {},
+  enumerable: true,
+  configurable: true
+})
+
+PseudoMap.prototype.values =
+PseudoMap.prototype.keys =
+PseudoMap.prototype.entries = function () {
+  throw new Error('iterators are not implemented in this version')
+}
+
+// Either identical, or both NaN
+function same (a, b) {
+  return a === b || a !== a && b !== b
+}
+
+function Entry (k, v, i) {
+  this.key = k
+  this.value = v
+  this._index = i
+}
+
+function find (data, k) {
+  for (var i = 0, s = '_' + k, key = s;
+       hasOwnProperty.call(data, key);
+       key = s + i++) {
+    if (same(data[key].key, k))
+      return data[key]
+  }
+}
+
+function set (data, k, v) {
+  for (var i = 0, s = '_' + k, key = s;
+       hasOwnProperty.call(data, key);
+       key = s + i++) {
+    if (same(data[key].key, k)) {
+      data[key].value = v
+      return
+    }
+  }
+  data.size++
+  data[key] = new Entry(k, v, key)
+}