ducha-qianduan/node_modules/rxjs/internal/operators/elementAt.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var ArgumentOutOfRangeError_1 = require("../util/ArgumentOutOfRangeError");
var filter_1 = require("./filter");
var throwIfEmpty_1 = require("./throwIfEmpty");
var defaultIfEmpty_1 = require("./defaultIfEmpty");
var take_1 = require("./take");
function elementAt(index, defaultValue) {
    if (index < 0) {
        throw new ArgumentOutOfRangeError_1.ArgumentOutOfRangeError();
    }
    var hasDefaultValue = arguments.length >= 2;
    return function (source) { return source.pipe(filter_1.filter(function (v, i) { return i === index; }), take_1.take(1), hasDefaultValue
        ? defaultIfEmpty_1.defaultIfEmpty(defaultValue)
        : throwIfEmpty_1.throwIfEmpty(function () { return new ArgumentOutOfRangeError_1.ArgumentOutOfRangeError(); })); };
}
exports.elementAt = elementAt;
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