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Given a class, see if instance has method (Ruby)
...ng instance_methods and include? when method_defined? does the job.
class Test
def hello; end
end
Test.method_defined? :hello #=> true
NOTE
In case you are coming to Ruby from another OO language OR you think that method_defined means ONLY methods that you defined explicitly with:
def my_...
Intersection and union of ArrayLists in Java
...ethods don't modify the original lists input to the methods.
public class Test {
public static void main(String... args) throws Exception {
List<String> list1 = new ArrayList<String>(Arrays.asList("A", "B", "C"));
List<String> list2 = new ArrayList<String&...
How would you count occurrences of a string (actually a char) within a string?
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@Mark Just tested it with a for loop and it was actually slower than using foreach. Could be because of bounds-checking? (Time was 1.65 sec vs 2.05 on 5 mil iterations.)
– Measuring
Dec 13 '16 at 9...
How to replace a hash key with another key
... key in hash then we can do it as follows:
Suppose my hash is my_hash = {'test' => 'ruby hash demo'}
Now I want to replace 'test' by 'message', then:
my_hash['message'] = my_hash.delete('test')
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Quicksort vs heapsort
...? What Quicksort has that is so special over others implementations?
I've tested the algorithms myself and I've seen that Quicksort has something special indeed. It runs fast, much faster than Heap and Merge algorithms.
The secret of Quicksort is: It almost doesn't do unnecessary element swaps. Sw...
HTML5 Audio stop function
...request, the old one is cancelled and our audio element is in clean state (tested in Chrome and FF) :>
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Bootstrap: Position of dropdown menu relative to navbar item
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I tested pull-right and pull-left in RTL website. They work perfect, but dropdown-menu-right and dropdown-menu-left not.
– curious1
Jan 7 '15 at 4:41
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What is the maximum possible length of a query string?
... after 64k characters, but can serve more than 100k characters. No further testing was done beyond that.
Firefox (Browser)
After 65,536 characters, the location bar no longer displays the URL in Windows Firefox 1.5.x. However, longer URLs will work. No further testing was done after 100,000 charact...
Finding out whether a string is numeric or not
...nd "a valid integer representation". Furthermore, it did exactly that in a test on iOS 4.3.2. However, NSNumberFormatter did return nil.
– Tommy
May 23 '11 at 10:56
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How can I create an object and add attributes to it?
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This seems a better solution to me than unittest.mock; the latter is a bit too heavy-weight and a bit more malleable. With a mock object, simply assigning to an attribute will cause it to spring into existence; SimpleNamespace will resist that.
– ...