ix/iterable/operators/skiplast.js

The Interactive Extensions for JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.skipLast = exports.SkipLastIterable = void 0;
const iterablex_js_1 = require("../iterablex.js");
/** @ignore */
class SkipLastIterable extends iterablex_js_1.IterableX {
    constructor(source, count) {
        super();
        this._source = source;
        this._count = count;
    }
    *[Symbol.iterator]() {
        const q = [];
        for (const item of this._source) {
            q.push(item);
            if (q.length > this._count) {
                yield q.shift();
            }
        }
    }
}
exports.SkipLastIterable = SkipLastIterable;
/**
 * Bypasses a specified number of elements at the end of an iterable sequence.
 *
 * @template TSource The type of the elements in the source sequence.
 * @param {number} count Number of elements to bypass at the end of the source sequence.
 * @returns {MonoTypeOperatorFunction<TSource>} An iterable sequence containing the
 * source sequence elements except for the bypassed ones at the end.
 */
function skipLast(count) {
    return function skipLastOperatorFunction(source) {
        return new SkipLastIterable(source, count);
    };
}
exports.skipLast = skipLast;

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