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Obtaining a powerset of a set in Java
...2^n possible combinations. Here's a working implementation, using generics and sets:
public static <T> Set<Set<T>> powerSet(Set<T> originalSet) {
Set<Set<T>> sets = new HashSet<Set<T>>();
if (originalSet.isEmpty()) {
sets.add(new HashS...
How to append the output to a file?
How can I do something like command > file in a way that it appends to the file, instead of overwriting?
3 Answers
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How can I add to List
...lowed in that List. The only "guarantee" is that you can only read from it and you'll get a T or subclass of T.
The reverse logic applies to super, e.g. List<? super T>. These are legal:
List<? super Number> foo3 = new ArrayList<Number>; // Number is a "super" of Number
List<?...
How do I make many-to-many field optional in Django?
When you have a many-to-many relationship ( related_name , not through ) and you are trying to use the admin interface you are required to enter one of the relationships even though it does not have to exist for you to create the first entry.
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split string in to 2 based on last occurrence of a separator
...ther: str.rpartition(sep) Split the string at the last occurrence of sep, and return a 3-tuple containing the part before the separator, the separator itself, and the part after the separator. If the separator is not found, return a 3-tuple containing two empty strings, followed by the string itsel...
“Automatic” vs “Automatic (Delayed start)”
...tically starting a Windows service on Windows startup. One is Automatic , and the other is Automatic (Delayed start) . What is the difference between these two in detail?
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How can I read input from the console using the Scanner class in Java?
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Let's say I only use the scanner once and don't want to clutter my code by initializing an then closing the Scanner - is there a way to get input from the user without constructing a class?
– Nearoo
Oct 13 '17 at 8:12
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How to access the first property of a Javascript object?
...eates an entire array of all of the object's keys.
– Andrew Mao
Jan 29 '14 at 5:23
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@T Nguyen I ...
How do I convert uint to int in C#?
...fault. In addition, you can modify this on a local basis using the checked and unchecked keywords.
– Greg Beech
Jul 15 '09 at 14:59
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css3 transition animation on load?
...}
...which basically says "at the start, the header will be off the left hand edge of the screen by its full width and at the end will be in place".
The second part is calling that slideInFromLeft animation:
animation: 1s ease-out 0s 1 slideInFromLeft;
Above is the shorthand version but here is th...