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import { mapTo as higherOrder } from '../operators/mapTo';
 * Emits the given constant value on the output Observable every time the source
 * Observable emits a value.
 * <span class="informal">Like {@link map}, but it maps every source value to
 * the same output value every time.</span>
 * <img src="./img/mapTo.png" width="100%">
 * Takes a constant `value` as argument, and emits that whenever the source
 * Observable emits a value. In other words, ignores the actual source value,
 * and simply uses the emission moment to know when to emit the given `value`.
 * @example <caption>Map every click to the string 'Hi'</caption>
 * var clicks = Rx.Observable.fromEvent(document, 'click');
 * var greetings = clicks.mapTo('Hi');
 * greetings.subscribe(x => console.log(x));
 * @see {@link map}
 * @param {any} value The value to map each source value to.
 * @return {Observable} An Observable that emits the given `value` every time
 * the source Observable emits something.
 * @method mapTo
 * @owner Observable
export function mapTo(value) {
    return higherOrder(value)(this);
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