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How to convert numbers between hexadecimal and decimal
...t decValue = unhex_table[(byte)hexNumber[0]];
for (int i = 1; i < hexNumber.Length; i++)
{
decValue *= 16;
decValue += unhex_table[(byte)hexNumber[i]];
}
return decValue;
}
}
...
What is the fastest way to create a checksum for large files in C#
...
I was just going through this issue with smaller files (<10MB, but taking forever to get an MD5). Even though I use .Net 4.5, switching to this method with the BufferedStream cut the hash time down from about 8.6 seconds to <300 ms for an 8.6MB file
– T...
What's a good way to overwrite DateTime.Now during testing?
... the date to a known value within the test so that I can test that the result is a known value?
11 Answers
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Is is possible to check if an object is already attached to a data context in Entity Framework?
... ended up with, which works very nicely:
public static void AttachToOrGet<T>(this ObjectContext context, string entitySetName, ref T entity)
where T : IEntityWithKey
{
ObjectStateEntry entry;
// Track whether we need to perform an attach
bool attach = false;
if (
c...
typedef fixed length array
...ar type24[3];
However, this is probably a very bad idea, because the resulting type is an array type, but users of it won't see that it's an array type. If used as a function argument, it will be passed by reference, not by value, and the sizeof for it will then be wrong.
A better solution would ...
Difference between partition key, composite key and clustering key in Cassandra?
...ey can be made by more columns, here's how:
create table stackoverflow_multiple (
k_part_one text,
k_part_two int,
k_clust_one text,
k_clust_two int,
k_clust_three uuid,
data text,
PRIMARY KEY((k_part_one, k_part_two), k_clust_one, k_clust_two, k_clust_thr...
Why is address zero used for the null pointer?
... zero. A null pointer constant can be converted to a pointer type; the result is the null pointer value of that type and is distinguishable from every other value of pointer to object or pointer to function type."
– GManNickG
May 3 '10 at 18:32
...
Passing base64 encoded strings in URL
...ce base64 strings can contain the "+", "=" and "/" characters which could alter the meaning of your data - look like a sub-folder.
Valid base64 characters are below.
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=
...
Get string character by index - Java
... another simple tutorial, this one or this one.
If you don't want the result as a char data type, but rather as a string, you would use the Character.toString method:
String text = "foo";
String letter = Character.toString(text.charAt(0));
System.out.println(letter); // Prints f
If you want more...
What is difference between instantiating an object using new vs. without
...s set to an address within that memory block (and also returned as the result of new), which is then stored in t. As you know, this is generally done on the heap (by default) and requires that you delete it later in the program, while the pointer in t is generally stored on the stack.
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