sequency/lib/takeWhile.js

Functional sequences for processing iterable data in JavaScript

Object.defineProperty(exports, "__esModule", { value: true });
exports.TakeWhile = void 0;
var Sequence_1 = require("./Sequence");
var TakeWhileIterator = /** @class */ (function () {
    function TakeWhileIterator(iterator, predicate) {
        this.iterator = iterator;
        this.predicate = predicate;
    }
    TakeWhileIterator.prototype.next = function (value) {
        var item = this.iterator.next();
        if (!item.done) {
            var result = this.predicate(item.value);
            if (result) {
                return { done: false, value: item.value };
            }
        }
        return { done: true, value: undefined };
    };
    return TakeWhileIterator;
}());
var TakeWhile = /** @class */ (function () {
    function TakeWhile() {
    }
    /**
     * Takes all elements of the sequence as long as the given `predicate` evaluates to true.
     *
     * @param {(item: T) => boolean} predicate
     * @returns {Sequence<T>}
     */
    TakeWhile.prototype.takeWhile = function (predicate) {
        return (0, Sequence_1.createSequence)(new TakeWhileIterator(this.iterator, predicate));
    };
    return TakeWhile;
}());
exports.TakeWhile = TakeWhile;
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