node_modules/rxjs/dist/esm5/internal/operators/elementAt.js

import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
import { filter } from './filter';
import { throwIfEmpty } from './throwIfEmpty';
import { defaultIfEmpty } from './defaultIfEmpty';
import { take } from './take';
export function elementAt(index, defaultValue) {
    if (index < 0) {
        throw new ArgumentOutOfRangeError();
    }
    var hasDefaultValue = arguments.length >= 2;
    return function (source) {
        return source.pipe(filter(function (v, i) { return i === index; }), take(1), hasDefaultValue ? defaultIfEmpty(defaultValue) : throwIfEmpty(function () { return new ArgumentOutOfRangeError(); }));
    };
}
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