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<div class="content" data-ice="content"><h1 data-ice="title">lib/doDuring.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import during from './during';
/**
* The post-check version of {@link async.during}. To reflect the difference in
* the order of operations, the arguments `test` and `fn` are switched.
*
* Also a version of {@link async.doWhilst} with asynchronous `test` function.
* @name doDuring
* @static
* @memberOf async
* @see async.during
* @category Control Flow
* @param {Function} fn - A function which is called each time `test` passes.
* The function is passed a `callback(err)`, which must be called once it has
* completed with an optional `err` argument. Invoked with (callback).
* @param {Function} test - asynchronous truth test to perform before each
* execution of `fn`. Invoked with (callback).
* @param {Function} [callback] - A callback which is called after the test
* function has failed and repeated execution of `fn` has stopped. `callback`
* will be passed an error and any arguments passed to the final `fn`'s
* callback. Invoked with (err, [results]);
*/
export default function doDuring(fn, test, callback) {
var calls = 0;
during(function(next) {
if (calls++ < 1) return next(null, true);
test.apply(this, arguments);
}, fn, callback);
}
</code></pre>
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