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Hash collision in git
...wice. But "surprisingly few" is a very relative term here.
Wikipedia has a table on the probability of Birthday Paradox collisions. There is no entry for a 40 character hash. But an interpolation of the entries for 32 and 48 characters lands us in the range of 5*1022 git commits for a 0.1% probabil...
Difference between Char.IsDigit() and Char.IsNumber() in C#
...DecimalDigitNumber.
I wrote this bit of code to indicate which is which: (Table isn't full due to allowed post size, but you should be able to generate it and it's only for example purposes anyway)
[Test]
public void IsNumberTest()
{
var numberLikes = new[] { UnicodeCategory.De...
Ways to save Backbone.js model data?
...er side. This could just be the ID of your donut resource in your database table.
If I make a PUT to that URI with new data, I'd be updating it, saving over it. And if I DELETE to that URI, then it would purge it from my system.
With POST, since you haven't created a resource yet it won't have an ...
What is a reasonable code coverage % for unit tests (and why)? [closed]
...o less!” Replied the master in a stern voice,
pounding his fist on the table.
The third programmer smiled, bowed,
and left.
...
After this last reply, a young
apprentice approached the great
master:
“Great master, today I overheard you answer the same question about
...
Releasing memory in Python
...le.
The costs are:
Process startup is kind of slow on some platforms, notably Windows. We're talking milliseconds here, not minutes, and if you're spinning up one child to do 300 seconds' worth of work, you won't even notice it. But it's not free.
If the large amount of temporary memory you use r...
In plain English, what does “git reset” do?
... though. In particular, if you take the time to carefully read them, those tables detailing states of files in index and work tree for all the various options and cases are very very helpful. (But yes, they're very dense - they're conveying an awful lot of the above information in a very concise for...
“Keep Me Logged In” - the best approach
...in, generate a large (128 to 256 bit) random token. Add that to a database table which maps the token to the userid, and then send it to the client in the cookie.
What if the attacker guesses the random token of another user?
Well, let's do some math here. We're generating a 128 bit random token....
ReactJS: Modeling Bi-Directional Infinite Scrolling
...
This is a mix of an infinite table and an infinite scroll scenario. The best abstraction I found for this is the following:
Overview
Make a <List> component that takes an array of all children. Since we do not render them, it's really cheap to ju...
What are some (concrete) use-cases for metaclasses?
... About the ORM case, are you talking about the class-based way of defining tables, or the metaclasses on mapped objects. Because SQLAlchemy can (rightly) map to any class (and I am assuming that it doesn't use a metaclass for that activity).
– Ali Afshar
Dec 24...
std::wstring VS std::string
...I character set including special characters?
Notice: A std::string is suitable for holding a 'binary' buffer, where a std::wstring is not!
On Linux? Yes.
On Windows? Only special characters available for the current locale of the Windows user.
Edit (After a comment from Johann Gerell):
a std::st...