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@Nullable annotation usage
...n Java8 or later there is a bit cleaner approach than an if block.
public String foo(@Nullable String mayBeNothing) {
return Optional.ofNullable(mayBeNothing).orElse("Really Nothing");
}
You can also throw some exception in there by swapping .orElse to
orElseThrow(() -> new Exception("Dont...
How do I sort a list by different parameters at different timed
...}
}
An example of usage (with a static import).
public static void main(String[] args) {
List<Person> list = null;
Collections.sort(list, decending(getComparator(NAME_SORT, ID_SORT)));
}
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Can I make the foreign key field optional in Django model
...go are never saved as NULL. Blank values are stored in the DB as an empty string ('').
– fang_dejavu
Jun 20 '16 at 18:32
8
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What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
...PTY_SET;
Map map = Collections.EMPTY_MAP;
As compared to:
List<String> s = Collections.emptyList();
Set<Long> l = Collections.emptySet();
Map<Date, String> d = Collections.emptyMap();
shar...
Can anyone explain IEnumerable and IEnumerator to me? [closed]
...:
// This seems reasonable ...
public class Program
{
static void Main(string[] args)
{
Console.WriteLine("***** Fun with IEnumerable / IEnumerator *****\n");
Garage carLot = new Garage();
// Hand over each car in the collection?
foreach (Car c in carLot)
{
...
Multiple submit buttons in an HTML form
...alls for a lot of trouble. Even the simple case: "we should abbreviate the string to 'Prev. Page' " will ruin your sites functionality.
– Tylla
May 4 at 23:30
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Obtaining a powerset of a set in Java
...
Isn't complexity (n*2^n)? Because binary string is of length n, and in each iteration of the main loop we iterate the entire binary string.
– Maggie
Sep 17 '13 at 5:53
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Select values from XML field in SQL Server 2008
...ome of these suggestions confusing. Whenever I used value with [1] in the string, it would only retrieved the first value. And some suggestions recommended using cross apply which (in my tests) just brought back far too much data.
So, here's my simple example of how you'd create an xml object, th...
How to remove a lua table entry by its key?
I have a lua table that I use as a hashmap, ie with string keys :
1 Answer
1
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What happens to a declared, uninitialized variable in C? Does it have a value?
... x86-64 calling conventions:
%rdi is the first printf argument, thus the string "%d\n" at address 0x4005e4
%rsi is the second printf argument, thus i.
It comes from -0x4(%rbp), which is the first 4-byte local variable.
At this point, rbp is in the first page of the stack has been allocated by th...