igniteui-webcomponents-datasources/esm2015/lib/util.js

Reference custom data providers for the Ignite UI Web Components data source.

import { fromEnum } from "igniteui-webcomponents-core";
export function toArray(en) {
    return Array.from(fromEnum(en));
}
export function first(iter) {
    for (let v of iter) {
        return v;
    }
    throw new Error("Iterable contained no elements, expected at least one");
}
export class LinkedList {
    get first() {
        return this._first;
    }
    get last() {
        return this._last;
    }
    addFirst(item) {
        if (this._first == null) {
            this._first = new LinkedListNode(item);
            this._last = this._first;
        }
        else {
            var oldFirst = this._first;
            this._first = new LinkedListNode(item);
            this._first.next = oldFirst;
            oldFirst.prev = this._first;
        }
    }
    addLast(item) {
        if (this._last == null) {
            this._first = new LinkedListNode(item);
            this._last = this._first;
        }
        else {
            var oldLast = this._last;
            this._last = new LinkedListNode(item);
            this._last.prev = oldLast;
            oldLast.next = this._last;
        }
    }
    removeFirst() {
        this.remove(this.first);
    }
    clear() {
        this._first = null;
        this._last = null;
    }
    contains(value) {
        let curr = this.first;
        while (curr != null) {
            if (curr.value === value) {
                return true;
            }
            curr = curr.next;
        }
        return false;
    }
    removeValue(value) {
        let curr = this.first;
        while (curr != null) {
            if (curr.value === value) {
                this.remove(curr);
                return;
            }
            curr = curr.next;
        }
    }
    remove(node) {
        if (this._first == node) {
            this._first = node.next;
            if (node.next != null) {
                node.next.prev = null;
            }
        }
        if (this._last == node) {
            this._last = node.prev;
            if (node.prev != null) {
                node.prev.next = null;
            }
        }
        if (node.prev != null) {
            node.prev.next = node.next;
        }
        if (node.next != null) {
            node.next.prev = node.prev;
        }
        node.next = null;
        node.prev = null;
    }
}
export class LinkedListNode {
    get value() {
        return this._value;
    }
    set value(value) {
        this._value = value;
    }
    get prev() {
        return this._prev;
    }
    set prev(value) {
        this._prev = value;
    }
    get next() {
        return this._next;
    }
    set next(value) {
        this._next = value;
    }
    constructor(item) {
        if (item !== undefined) {
            this.value = item;
        }
    }
}