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Weak and strong property setter attributes in Objective-C
What is the difference between weak and strong property setter attributes in Objective-C?
5 Answers
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Relational Database Design Patterns? [closed]
...oyees, accounts, shipping, purchases, etc), Volume 2 contains industry specific data models (accounting, healthcare, etc), Volume 3 provides data model patterns.
Finally, while this book is ostensibly about UML and Object Modelling, Peter Coad's Modeling in Color With UML provides an "archetype" dr...
How can I delete multiple lines in vi?
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I find this easier
Go VISUAL mode Shift+v
Select lines
d to delete
https://superuser.com/questions/170795/how-can-i-select-and-delete-lines-of-text-in-vi
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Nested defaultdict of defaultdict
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One note. If you are trying to use this code while pickling lambda won't work.
– Viacheslav Kondratiuk
Apr 3 '17 at 11:52
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I want to get the type of a variable at runtime
...stance, may want not to know what is the type of the variable, but to know if the type of the value is some specific type, such as this:
val x: Any = 5
def f[T](v: T) = v match {
case _: Int => "Int"
case _: String => "String"
case _ => "Unknown"
}
f(x)
Here it doesn't m...
change cursor to finger pointer
...ke it's necessary to have both onmouseover="" AND style=cursor: pointer;". If you just have the style tag, the pointer pointer cursor will disappear/default to the standard pointer after one click interaction. Good post Scott, thank you.
– Nubtacular
Jun 4 '15 ...
Best approach to converting Boolean object to string in java
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I don't think there would be any significant performance difference between them, but I would prefer the 1st way.
If you have a Boolean reference, Boolean.toString(boolean) will throw NullPointerException if your reference is null. As the reference is unboxed t...
Sorting arraylist in alphabetical order (case insensitive)
...s1, String s2) {
return s1.compareToIgnoreCase(s2);
}
});
Or if you are using Java 8:
list.sort(String::compareToIgnoreCase);
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Pass mouse events through absolutely-positioned element
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But what if you just want to let some event like the scroll event to pass through but for the top element to still respond to all other events. Setting pointer-events to none kills all the events on the top element.
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How do I delete an exported environment variable?
...variables you set in one terminal instance will not carry over to another. If you have a variable which seems to be set automatically every time you open terminal, try looking through the various hidden files in your home directory for it. Or, to see where it is being set, try "grep -r <X> ~" ...