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entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
...ime I try to save my contact, which is validated I get the exception "ADO.Net Entity Framework An entity object cannot be referenced by multiple instances of IEntityChangeTracker"
...
Calculate MD5 checksum for a file
... use SHA-256 just out of habit :) I don't know about support for CRC32 in .NET offhand, but you can probably search for it as quickly as I can :)
– Jon Skeet
Jul 30 '14 at 13:40
12...
How does OpenID authentication work?
...-centric digital identity. OpenID takes advantage of already existing internet technology (URI, HTTP, SSL, Diffie-Hellman) and realizes that people are already creating identities for themselves whether it be at their blog, photostream, profile page, etc. With OpenID you can easily transform one of ...
Why use sprintf function in PHP?
I am trying to learn more about the PHP function sprintf() but php.net did not help me much as I am still confused, why would you want to use it?
...
Get average color of image via Javascript
...e only way to do this is with <canvas/>...
DEMO V2: http://jsfiddle.net/xLF38/818/
Note, this will only work with images on the same domain and in browsers that support HTML5 canvas:
function getAverageRGB(imgEl) {
var blockSize = 5, // only visit every 5 pixels
defaultRGB = {r...
How can jQuery deferred be used?
...forming Ajax request for id '" + id + "'");
$.getJSON('http://jsfiddle.net/echo/jsonp/?callback=?', {value: id}, function(data) {
resultHandler(data.value);
});
});
ajaxCache.compute("anID").then(function(result) {
console.log("result: " + result);
});
ajaxCache.compute("anothe...
Accessing JPEG EXIF rotation data in JavaScript on the client side
...he exif-js library in combination with the HTML5 File API: http://jsfiddle.net/xQnMd/1/.
$("input").change(function() {
var file = this.files[0]; // file
fr = new FileReader; // to read file contents
fr.onloadend = function() {
// get EXIF data
var exif = EXIF.re...
Bootstrap with jQuery Validation Plugin
...r.insertAfter(element);
}
}
});
See Example: http://jsfiddle.net/mapb_1990/hTPY7/7/
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Checking if a key exists in a JavaScript object?
...on it, while 3 can return false on it.)
Reference:
http://book.mixu.net/node/ch5.html
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What does status=canceled for a resource mean in Chrome Developer Tools?
...ently and it seemed dependent on the computer and/or the speed of the internet connection.
This information is a few months out of date, but I built Chromium from scratch, dug through the source to find all the places where requests could get cancelled, and slapped breakpoints on all of them to deb...