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I can’t find the Android keytool
...r your certificate's MD5 fingerprint. Wtf is that, you might say. I don't know, but just do what I say and your Android app doesn't get hurt.
Go to Start>Run and type cmd to open up a command prompt. You need to navigate to the directory with the keytool.exe file, which might be in a slightly di...
Detecting Unsaved Changes
...he form with the users previous entries - without firing the change-event. Now the form will be dirty, but the flag won't be set unless the user makes another edit.
– Oskar Berggren
Aug 31 '14 at 16:05
...
Why use apparently meaningless do-while and if-else statements in macros?
...say you
had something like your second macro.
#define BAR(X) f(x); g(x)
Now if you were to use BAR(X); in an if ... else statement, where the bodies of the if statement were not wrapped in curly brackets, you'd get a bad surprise.
if (corge)
BAR(corge);
else
gralt();
The above code would e...
How to serve static files in Flask
...rrassing. I've got an application that I threw together in Flask and for now it is just serving up a single static HTML page with some links to CSS and JS. And I can't find where in the documentation Flask describes returning static files. Yes, I could use render_template but I know the data i...
Why is Python 3.x's super() magic?
...decorator_returning_new_class
class Foo(Bar):
def baz(self):
# Now `Foo` is a *different class*
return super(Foo, self).baz() + 42
The magic super() __class__ cell sidesteps these issues nicely by giving you access to the original class object.
The PEP was kicked off by Guido,...
Random String Generator Returning Same String [duplicate]
...ething like this:
private static Random random = new Random((int)DateTime.Now.Ticks);//thanks to McAden
private string RandomString(int size)
{
StringBuilder builder = new StringBuilder();
char ch;
for (int i = 0; i < size; i++)
{
ch = Convert.ToCh...
How to set Java environment path in Ubuntu
... java
java: /usr/bin/java /usr/share/java /usr/share/man/man1/java.1.gz
Now dig deeper-
$ ls -l /usr/bin/java
lrwxrwxrwx 1 root root 46 Aug 25 2018 /etc/alternatives/java -> /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
Dig deeper:
$ ls -l /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
...
How to print without newline or space?
...t to answer @Rishav flush empties the buffer and displays the output right now. Without flush you might have your exact text printed eventually, but only when the system gets around to processing the graphics instead of the IO. Flush makes the text visible immediately by "flushing" the cache.
...
How to re-create database for Entity Framework?
...to say that it ran this script correctly. Go and check it out if you like.
Now, uncomment that code and save.
You can run Update-Database again if you want to check that EF thinks its up to date. It won't run the Up step with all of the CreateTable commands because it thinks it's already done this.
...
Django datetime issues (default=datetime.now())
...
it looks like datetime.now() is being evaluated when the model is defined, and not each time you add a record.
Django has a feature to accomplish what you are trying to do already:
date = models.DateTimeField(auto_now_add=True, blank=True)
or
...