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Add delay(fn, timeout) Higher-Order Function #1

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Add delay(fn, timeout) Higher-Order Function #1

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2cdfe57
- added delayed(fn, timeout) - a higher-order function which creates …
semmel Oct 21, 2013
5349e72
Screenshot, Readme
semmel Oct 21, 2013
894204e
added sequenced function execution
semmel Nov 26, 2013
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6 changes: 3 additions & 3 deletions README.md
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Original file line number Diff line number Diff line change
@@ -1,10 +1,10 @@
Debounce & Throtte JavaScript demo
Debounce, Throttle & Delayed JavaScript demo
=======================================

Visual demo of debounce and throttling in different implementations jQuery Plugin, underscore.js and lodash.js.
Visual demo of debounce, throttling and delaying in different implementations jQuery Plugin, underscore.js and lodash.js.
More in the blog post [Debounce & throttle, a visual explanation](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)

Author David Corbacho Román


![Screenshot](http://drupalmotion.com/sites/default/files/pics/screenshot.png)
![Screenshot](ScreenShot.png)
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49 changes: 49 additions & 0 deletions index.html
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Expand Up @@ -91,6 +91,53 @@
<script type="text/javascript" src="main.js"></script>
<script type="text/javascript" src="jquery-throttle-debounce.js"></script>
<script>window.lo = _.noConflict();</script>
<script type="text/javascript">
function delayed(func, timeout)
{
return lo.compose(lo.partialRight(setTimeout, timeout), func.bind.bind(func, func));
}


function sequenced(method, pauseMSecs)
{
var previous = 0;
var timeout = 0;
var invocations = [];
var lastResult;

function callNext()
{
var invocation = invocations.shift();

lastResult = method.apply(invocation.context, invocation.parameters);

if (invocations.length > 0)
{
timeout = setTimeout(callNext, pauseMSecs);
}
else
{
timeout = 0;
}

previous = (new Date()).getTime();
}

return function()
{
invocations.push({context: this, parameters: arguments});

if (timeout == 0)
{
var remaining = pauseMSecs - ((new Date()).getTime() - previous);

timeout = setTimeout(callNext, Math.min(Math.max(0, remaining), pauseMSecs));
}

return lastResult;
};
}
</script>

</head>
<body>
Expand All @@ -108,6 +155,8 @@

<div id="content">
<h2>Mousemove Events:</h2><div id="allEvents"></div>
<h2>Delayed Mousemove Events: delayed(fn, 200);</h2><div id="delayedEvents"></div>
<h2>Sequenced Mousemove Events: sequenced(fn, 200);</h2><div id="sequencedEvents"></div>
<h2>Debounce Inmediate: _.debounce(fn, 200, true);</h2><div id="debounce_true"></div>
<h2>Debounce Inmediate: $.debounce(200, true, fn);</h2> <div id="debouncejtrue"></div>
<h2>Debounce: _.debounce(fn, 200);</h2> <div id="debounce_false"></div>
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