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What is the proper way to check if a string is empty in Perl?
... Very useful when you obtained the string by shifting of an array which may have 0 elements.
– Dacav
Nov 13 '11 at 12:45
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How to create a trie in Python
...ation.
pygtrie - a pure python implementation by Google.
datrie - a double array trie implementation based on libdatrie.
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How to save all the variables in the current python session?
...
I tried this and found it can't save named arrays though this might be a pickle limitation.
– rhody
Nov 21 '19 at 17:48
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How to Create Deterministic Guids
... .SHA1CryptoServiceProvider()
.ComputeHash(stringbytes);
Array.Resize(ref hashedBytes, 16);
return new Guid(hashedBytes);
}
There are much better ways to generate a unique Guid but this is a way to consistently upgrading a string data key to a Guid data key.
...
Check for column name in a SqlDataReader object
...Names = Enumerable.Range(0, dr.FieldCount).Select(i => dr.GetName(i)).ToArray();
Then,
if (fieldNames.Contains("myField"))
{
var myFieldValue = dr["myField"];
...
Edit
Much more efficient one-liner that does not requires to load the schema:
var exists = Enumerable.Range(0, dr.Field...
What is object serialization?
...other
// machine, a database, an in memory array, etc.
new FileOutputStream(new File("o.ser")));
// do the magic
oos.writeObject( instance );
// close the writing.
oos.close();
}
}
When we run thi...
Memory footprint of Haskell data types
...r
= S# Int# -- small integers
| J# Int# ByteArray# -- large integers
so a small Integer (S#) takes 2 words, but a large integer takes a variable amount of space depending on its value. A ByteArray# takes 2 words (header + size) plus space for the arr...
How to change variables value while debugging with LLDB in Xcode?
...int
hit or signal.
Examples:
expr my_struct->a = my_array[3]
expr -f bin -- (index * 8) + 5
expr char c[] = "foo"; c[0]
IMPORTANT NOTE: Because this command takes 'raw' input, if you use any command options you must use ' -- ' between the end of the
comma...
JSON.parse vs. eval()
...there is no doubt on the nature of the expression and eval will creates an array containing the parsed objet
– Charles HETIER
Nov 25 '14 at 9:50
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Pass Method as Parameter using C#
...ethod(Delegate yourMethod)
{
yourMethod.DynamicInvoke(new object[] { /*Array of arguments to pass*/ });
}
static void Main()
{
CallAnyMethod(MyMethod);
}
Three different ways, the same concept behind:
Way 1
Use the Delegate special class directly as the example above. The problem of t...