node-opcua-server
Version:
pure nodejs OPCUA SDK - module server
72 lines • 1.93 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Queue = void 0;
// tslint:disable-next-line:no-var-requires
const Dequeue = require("dequeue");
class Queue {
constructor() {
this._d = new Dequeue();
this.size = 0;
}
clear() {
this.size = 0;
}
first() {
if (this.size === 0) {
return undefined;
}
return this._d.first();
}
shift() {
if (this.size === 0) {
return undefined;
}
this.size -= 1;
return this._d.shift();
}
push(value) {
this.size += 1;
this._d.push(value);
}
filterOut(predicate) {
let counter = 0;
let p = this._d.head.next;
while (p != this._d.head) {
const shouldRemove = predicate(p.data);
const pPrev = p;
p = p.next;
if (shouldRemove) {
this.size -= 1;
counter += 1;
pPrev.remove();
}
}
return counter;
}
values() {
// eslint-disable-next-line @typescript-eslint/no-this-alias
const self = this;
const iteratable = {
[Symbol.iterator]() {
let cursor = self._d.head;
const iterator = {
next() {
cursor = cursor.next;
if (cursor === self._d.head) {
return { done: true, value: null };
}
const ret = {
done: false,
value: cursor.data
};
return ret;
}
};
return iterator;
}
};
return iteratable;
}
}
exports.Queue = Queue;
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