sequency/lib/withIndex.js

Functional sequences for processing iterable data in JavaScript

Object.defineProperty(exports, "__esModule", { value: true });
exports.WithIndex = void 0;
var Sequence_1 = require("./Sequence");
var IndexIterator = /** @class */ (function () {
    function IndexIterator(iterator) {
        this.iterator = iterator;
        this.index = -1;
    }
    IndexIterator.prototype.next = function (value) {
        var item = this.iterator.next();
        if (item.done) {
            return { done: true, value: undefined };
        }
        this.index++;
        return {
            done: false,
            value: {
                index: this.index,
                value: item.value
            }
        };
    };
    return IndexIterator;
}());
var WithIndex = /** @class */ (function () {
    function WithIndex() {
    }
    /**
     * Returns a new sequence consisting of indexed values for all original elements.
     *
     * @returns {Sequence<IndexedValue<T>>}
     */
    WithIndex.prototype.withIndex = function () {
        return (0, Sequence_1.createSequence)(new IndexIterator(this.iterator));
    };
    return WithIndex;
}());
exports.WithIndex = WithIndex;
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