%PDF-
%PDF-
Mini Shell
Mini Shell
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const BinaryHeap_1 = require("./BinaryHeap");
const units_1 = require("./units");
class ExponentiallyDecayingSample {
constructor(options) {
this.RESCALE_INTERVAL = 1 * units_1.default.HOURS;
this.ALPHA = 0.015;
this.SIZE = 1028;
options = options || {};
this._elements = new BinaryHeap_1.default({
score: function (element) {
return -element.priority;
}
});
this._rescaleInterval = options.rescaleInterval || this.RESCALE_INTERVAL;
this._alpha = options.alpha || this.ALPHA;
this._size = options.size || this.SIZE;
this._random = options.random || this._random;
this._landmark = null;
this._nextRescale = null;
this._mean = null;
}
update(value, timestamp) {
const now = Date.now();
if (!this._landmark) {
this._landmark = now;
this._nextRescale = this._landmark + this._rescaleInterval;
}
timestamp = timestamp || now;
const newSize = this._elements.size() + 1;
const element = {
priority: this._priority(timestamp - this._landmark),
value: value
};
if (newSize <= this._size) {
this._elements.add(element);
}
else if (element.priority > this._elements.first().priority) {
this._elements.removeFirst();
this._elements.add(element);
}
if (now >= this._nextRescale)
this._rescale(now);
}
toSortedArray() {
return this._elements
.toSortedArray()
.map(function (element) {
return element.value;
});
}
toArray() {
return this._elements
.toArray()
.map(function (element) {
return element.value;
});
}
_weight(age) {
return Math.exp(this._alpha * (age / 1000));
}
_priority(age) {
return this._weight(age) / this._random();
}
_random() {
return Math.random();
}
_rescale(now) {
now = now || Date.now();
const self = this;
const oldLandmark = this._landmark;
this._landmark = now || Date.now();
this._nextRescale = now + this._rescaleInterval;
const factor = self._priority(-(self._landmark - oldLandmark));
this._elements
.toArray()
.forEach(function (element) {
element.priority *= factor;
});
}
avg(now) {
let sum = 0;
this._elements
.toArray()
.forEach(function (element) {
sum += element.value;
});
return (sum / this._elements.size());
}
}
exports.default = ExponentiallyDecayingSample;
//# sourceMappingURL=data:application/json;base64,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
Zerion Mini Shell 1.0