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Fast way of finding lines in one file that are not in another?
...ind lines common to both files
comm -12 file1 file2
The man file is actually quite readable for this.
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Where does the @Transactional annotation belong?
...r their methods or is it better to annotate the Service classes which are calling using the DAO objects? Or does it make sense to annotate both "layers"?
...
How to read attribute value from XmlNode in C#?
...
To expand Konamiman's solution (including all relevant null checks), this is what I've been doing:
if (node.Attributes != null)
{
var nameAttribute = node.Attributes["Name"];
if (nameAttribute != null)
return nameAttribute.Value;
throw new InvalidOp...
Convert date to datetime in Python
...lue representable by datetime and then getting its time component. Incidentally, datetime.min = datetime(MINYEAR, 1, 1, tzinfo=None) and has a time of 00:00:00. However, I think it is cleaner to explicitly create a 00:00:00 time either through time.min or time(0, 0, 0, 0).
– Fl...
What is global::?
...ss System
{
}
}
If you were to use System where it would be locally scoped in the foo class, you could use:
global::System.Console.WriteLine("foobar");
to access the global namespace.
Example
using System;
class Foo
{
public void baz()
{
Console.WriteLine("Foo 1");
...
Should I avoid the use of set(Preferred|Maximum|Minimum)Size methods in Java Swing?
...uld I use them? In which context? For what purposes?
I don't know, personally I think of it as an API design accident. Slightly forced by compound components having special ideas about child sizes. "Slightly", because they should have implemented their needs with a custom LayoutManager.
What ex...
Is it safe to delete a NULL pointer?
...ter delete. Setting a pointer to NULL after deleting it masquerades memory allocation errors, which is a very bad thing. A program that is correct does not delete a pointer twice, and a program that does delete a pointer twice should crash.
– Damon
Aug 30 '13 a...
How does one write code that best utilizes the CPU cache to improve performance?
...
The cache is there to reduce the number of times the CPU would stall waiting for a memory request to be fulfilled (avoiding the memory latency), and as a second effect, possibly to reduce the overall amount of data that needs to be transfered (preserving memory bandwidth).
Techniques for ...
How to export iTerm2 Profiles
... folder or URL:. There is a button next to it Save settings to Folder.
So all you need to do is save your settings first and load it after you reinstalled your OS.
If the Save settings to Folder is disabled, select a folder (e.g. empty) in the Load preferences from a custom folder or URL: text box...
Shell command to tar directory excluding certain files/folders
...r.
If you want to archive everything except /usr you can use:
tar -zcvf /all.tgz / --exclude=/usr
In your case perhaps something like
tar -zcvf archive.tgz arc_dir --exclude=dir/ignore_this_dir
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