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When does invoking a member function on a null instance result in undefined behavior?
...rstand is why it's undefined behavior to dereference a null pointer. In C++03, there's actually a bit of ambiguity here.
Although "dereferencing a null pointer results in undefined behavior" is mentioned in notes in both §1.9/4 and §8.3.2/4, it's never explicitly stated. (Notes are non-normative....
How does deriving work in Haskell?
... |
edited Jan 26 '16 at 10:40
Lii
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answered Oct ...
Android Archive Library (aar) vs standard jar
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answered May 28 '14 at 16:00
unifyunify
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What is the difference between persist() and merge() in JPA and Hibernate?
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answered Dec 22 '10 at 12:57
axtavtaxtavt
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Casperjs/PhantomJs vs Selenium
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answered Dec 31 '12 at 10:38
Ariya HidayatAriya Hidayat
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How can I check whether an array is null / empty?
...mpty" here has no official meaning. I'm choosing to define empty as having 0 elements:
arr = new int[0];
if (arr.length == 0) {
System.out.println("array is empty");
}
An alternative definition of "empty" is if all the elements are null:
Object arr[] = new Object[10];
boolean empty = true;
for...
How to set selected value of jquery select2?
...lected" value of a Select2 component:
$('#inputID').select2('data', {id: 100, a_key: 'Lorem Ipsum'});
Where the second parameter is an object with expected values.
UPDATE:
This does work, just wanted to note that in the new select2, "a_key" is "text" in a standard select2 object. so: {id: 100, ...
How do I test an AngularJS service with Jasmine?
...oper way'
– LeeGee
Jan 15 '16 at 9:50
2
@LeeGee I think we can call it the 'proper' way because i...
Where to define custom error types in Ruby and/or Rails?
...
+50
For Gems
I have seen many times that you define exceptions in this way:
gem_dir/lib/gem_name/exceptions.rb
and defined as:
mod...
What's the difference between a continuation and a callback?
...
+50
I believe that continuations are a special case of callbacks. A function may callback any number of functions, any number of times. Fo...