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How can I convert byte size into a human-readable format in Java?
...: The original snippet posted here was the most copied Java snippet of all time on Stack Overflow, and it was flawed. It was fixed, but it got messy.
Full story in this article: The most copied Stack Overflow snippet of all time is flawed!
Source: Formatting byte size to human readable format | Pro...
PostgreSQL: Difference between text and varchar (character varying)
...s are needed to check the length, if one is given, and the extra space and time required if padding is needed for char(n).
However, when you only need to store a single character, there is a slight performance advantage to using the special type "char" (keep the double-quotes — they're part of th...
Passing a std::array of unknown size to a function
...ely, use vector instead of array, which allows you to store the size at runtime rather than as part of its type:
void mulArray(std::vector<int>& arr, const int multiplier) {
for(auto& e : arr) {
e *= multiplier;
}
}
...
Which cryptographic hash function should I choose?
... one wins the intergalactic lottery, ever.
But ... MD5 is broken
Sometimes the fact that its broken does not matter.
As it stands there are no known pre-image or second pre-image attacks on MD5.
So what is so broken about MD5, you may ask? It is possible for a third party to generate 2 mess...
Is there a method to generate a UUID with go language
...d via other algorithms (e.g. version 1 UUIDs based on your MAC address and time).
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RegEx for matching UK Postcodes
... this postcode versus any other postcode; probably never? This means every time the regex is used, it must exhaust this option first before proceeding to the next option. To see how performance is impacted check the number of steps the original regex took (35) against the same regex after having fli...
NHibernate vs LINQ to SQL
...tructure. For simple applications, this is perfectly acceptable (and oftentimes even preferable), but for more complex applications devs will often suggest using a domain driven design pattern instead (which is what NHibernate facilitates).
The problem with the table-per-class pattern is that your...
How to check if a file is a valid image file?
...
A lot of times the first couple chars will be a magic number for various file formats. You could check for this in addition to your exception checking above.
...
Type erasure techniques
...tion) §25.3, states:
Variants of the technique of using a single runt-time representation for values of a number of types and relying on the (static) type system to ensure that they are used only according to their declared type has been called type erasure.
In particular, no use of virtual f...
Can I have multiple :before pseudo-elements for the same element?
... an element can only have at most one of any kind of pseudo-element at any time. (This means an element can have both a :before and an :after pseudo-element — it just cannot have more than one of each kind.)
As a result, when you have multiple :before rules matching the same element, they will al...