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Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...gth of 255 is chosen so often, other than being a nice round number ? Is it a holdout from some time in the past when there was a good reason (whether or not it applies today)?
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Why are primes important in cryptography?
One thing that always strikes me as a non-cryptographer: Why is it so important to use Prime numbers? What makes them so special in cryptography?
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JavaScript: filter() for Objects
...e. Things will break. You're extending all object types, including object literals.
Here's a quick example you can try:
// Extend Object.prototype
Object.prototype.extended = "I'm everywhere!";
// See the result
alert( {}.extended ); // "I'm everywhere!"
alert( [].extended ); ...
Why is argc not a constant?
As Effective C++ Item#3 states "Use const whenever possible", I start thinking "why not make these 'constant' parameters const "?.
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How would Git handle a SHA-1 collision on a blob?
...-world yet, and may never happen, but let's consider this: say you have a git repository, make a commit, and get very very unlucky: one of the blobs ends up having the same SHA-1 as another that is already in your repository. Question is, how would Git handle this? Simply fail? Find a way to link th...
Hidden features of C
...all C compiler implementations, so there should be no hidden features. Despite that, I am sure all C developers have hidden/secret tricks they use all the time.
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How does data binding work in AngularJS?
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AngularJS remembers the value and compares it to a previous value. This is basic dirty-checking. If there is a change in value, then it fires the change event.
The $apply() method, which is what you call when you are transitioning from a non-AngularJS world into an A...
Prevent contenteditable adding on ENTER - Chrome
I have a contenteditable element, and whenever I type some stuff and hit ENTER it creates a new <div> and places the new line text in there. I don't like this one little bit.
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Tools for creating Class Diagrams [closed]
Please suggest tools for creating Class Diagrams with the following criteria:
13 Answers
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port forwarding in windows
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I've solved it, it can be done executing:
netsh interface portproxy add v4tov4 listenport=4422 listenaddress=192.168.1.111 connectport=80 connectaddress=192.168.0.33
To remove forwarding:
netsh interface portproxy delete v4tov4 liste...