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Image fingerprint to compare similarity of many images
...is this php project :
https://github.com/kennethrapp/phasher
And my little javascript clone:
https://redaktor.me/phasher/demo_js/index.html
Unfortunately this is "bitcount"-based but will recognize rotated images.
Another approach in javascript was to build a luminosity histogram from the image by t...
Storing Objects in HTML5 localStorage
I'd like to store a JavaScript object in HTML5 localStorage , but my object is apparently being converted to a string.
22 ...
Immediate function invocation syntax
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I'm glad I read this. I've just finished reading Javascript: The Good Parts, and what I kept thinking was that assigning the result of calling a function is really bad syntax, because you have to look at the first and last lines to understand what is happening. He doesn't u...
How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
...ript src="/socket.io/socket.io.js"></script>
<script src="/javascripts/jquery-1.4.3.min.js"></script>
</head>
<body>
<div id="content"></div>
<script>
$(document).ready(function() {
var socket = new io.Socket('loc...
Why should I use Google's CDN for jQuery?
... you are serving pages over SSL
that require jQuery. You should
serve the JavaScript over SSL as
well as your page to avoid security
problems and warnings.
Also, Microsoft hosts jQuery on their CDN. That is another choice comparable to using Google's hosted jQuery.
...
How to know if user is logged in with passport.js?
... sessionStorage.removeItem("status");
};
function funcFail() { alert('Login method Failed'); };
};
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HTML anchor link - href and onclick both?
I want to author an anchor tag that executes some JavaScript and then proceeds to go wherever the href was taking it. Invoking a function that executes my JavaScript and then sets window.location or top.location to the href location doesn't work for me.
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Checking for a dirty index or untracked files with Git
...mand in a script. For example:
test -z "$(git status --porcelain)" || red-alert "UNCLEAN UNCLEAN"
This effectively says "either there are no changes to be made or set off an alarm"; this one-liner might be preferable to an if-statement depending on the script you are writing.
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Prevent users from submitting a form by hitting Enter
...</form>
One nice feature of this approach is that it works without JavaScript; whether or not JavaScript is enabled, a standards-conforming web browser is required to prevent implicit form submission.
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When are you supposed to use escape instead of encodeURI / encodeURIComponent?
...Script code....
Behaviour:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/escape
Special characters are encoded with the exception of: @*_+-./
The hexadecimal form for characters, whose code unit value is 0xFF or less, is a two-digit escape sequence: %xx.
For ...