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How is Generic Covariance & Contra-variance Implemented in C# 4.0?
...unced to support Generic covariance and contra-variance. That is, List<string> can be assigned to List<object> . How could that be?
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Date only from TextBoxFor()
...Name("Start Date")]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:yyyy-MM-dd}")]
public DateTime StartDate { get; set; }
Then:
<%=Html.EditorFor(m => m.StartDate) %>
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Common use-cases for pickle in Python
...ython objects in a database
4) converting an arbitrary python object to a string so that it can be used as a dictionary key (e.g. for caching & memoization).
There are some issues with the last one - two identical objects can be pickled and result in different strings - or even the same object...
Why is Spring's ApplicationContext.getBean considered bad?
...{
private MySpringBean mySpringBean;
public static void main(String[] args) {
AutowireThisDriver atd = new AutowireThisDriver(); //get instance
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(
"/WEB-INF/applicationContext.xml"); ...
Remove redundant paths from $PATH variable
... your command sets the PATH to - $PATH(the current value of PATH) + the string /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games. If you want to have just the String, remove $PATH + the semicolon (:) from your command. It doesn't matter if you use echo or edit the file...
Django connection to PostgreSQL: “Peer authentication failed”
...s.djangoproject.com/en/1.6/ref/settings/#host ) lies: "HOST [...] An empty string means localhost". This is not true, I had the same problem and I fixed it writing 'localhost'. Thank you for the tip.
– Marco Sulla
Nov 25 '13 at 20:03
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How can I read input from the console using the Scanner class in Java?
...rintln("Enter your username: ");
Scanner scanner = new Scanner(System.in);
String username = scanner.nextLine();
System.out.println("Your username is " + username);
You could also use next(String pattern) if you want more control over the input, or just validate the username variable.
You'll find...
How to check if hex color is “too black”?
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You have to extract the three RGB components individually, and then use a standard formula to convert the resulting RGB values into their perceived brightness.
Assuming a six character colour:
var c = c.substring(1); // strip #
var rgb = parseInt(c, 16); // convert rrg...
How to replace (or strip) an extension from a filename in Python?
... )[ 0 ] )
# '/home/user/somefile'
The rsplit tells Python to perform the string splits starting from the right of the string, and the 1 says to perform at most one split (so that e.g. 'foo.bar.baz' -> [ 'foo.bar', 'baz' ]). Since rsplit will always return a non-empty array, we may safely index ...
I want to copy table contained from one database and insert onto another database table
...wered Oct 2 '13 at 21:07
HukeLau_DABAHukeLau_DABA
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