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How to convert hashmap to JSON object in Java
... The Map.Entry<K,V>> entrySet() is meant for iteration of a map. Reading the keys and searching the map for each key is a suboptimal way.
– Martin
Apr 20 at 13:42
ad...
How do I make a UITableViewCell appear disabled?
...ake a UITableViewCell appear disabled:
// Mac's native DigitalColor Meter reads exactly {R:143, G:143, B:143}.
cell.textLabel.alpha = 0.439216f; // (1 - alpha) * 255 = 143
aSwitch.enabled = NO; // or [(UISwitch *)cell.accessoryView setEnabled:NO];
And then, to actually disable the cell:
cell.use...
git visual diff between branches
...
For readers: As of my post, every answer here gives a way to do what the person asked for (a diff in a GUI) except for this answer.
– G Huxley
Mar 1 '17 at 20:53
...
python design patterns [closed]
...
You may also wish to read this article (select the .pdf file), which discusses Design Patterns in dynamic object oriented languages (i.e. Python). To quote the page:
This paper explores how the patterns from the "Gang of Four", or "GOF" book,...
What is the purpose of a question mark after a type (for example: int? myVariable)?
... as object or MyClass, will, on the other hand, be null. You might want to read up on the difference between value types and reference types.
– Klaus Byskov Pedersen
Jun 30 '17 at 22:39
...
Preferred way to create a Scala list
... want to focus on immutability in Scala generally by eliminating any vars.
Readability is still important for your fellow man so:
Try:
scala> val list = for(i <- 1 to 10) yield i
list: scala.collection.immutable.IndexedSeq[Int] = Vector(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
You probably don't eve...
What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?
... typeof users.user_id.name == 'undefined' ) ...
was failing with "Cannot read property 'name' of null"
Then I noticed that I needed to do the checking like this:
if ( typeof users.user_id == 'undefined' ) ...
I needed to check the "container" of 'name', so it worked!
After that, this worked the...
How to delete last item in list?
...mments)
Note 2: The code could use some Python idioms. I highly recommend reading this:
Code Like a Pythonista: Idiomatic Python (via wayback machine archive).
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...
Java Logging vs Log4J [closed]
... no to all of them, JUL will be more than adequate and it's conveniently already included in the SDK.
That said, pretty much every project these days seems to wind up including log4j, if only because some other library uses it.
...
“X does not name a type” error in C++
...
void bar::some_func(foo& fr)
{
// now that foo is defined, we can read that reference:
fr.fooInt = 111605;
fr.foDouble = 123.456;
}
By forward declaring User, MyMessageBox can still form a pointer or reference to it:
class User; // let the compiler know such a class will be defin...