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Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
... This way, you are avoiding the "diamond problem": en.wikipedia.org/wiki/Diamond_problem#The_diamond_problem
– Nick L.
Feb 13 '14 at 15:32
6
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How do I convert a Ruby class name to a underscore-delimited symbol?
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Rails comes with a method called underscore that will allow you to transform CamelCased strings into underscore_separated strings. So you might be able to do this:
FooBar.name.underscore.to_sym
But you will have to install ActiveSupport just to do that, as ipsum...
Difference between Divide and Conquer Algo and Dynamic Programming
What is the difference between Divide and Conquer Algorithms and Dynamic Programming Algorithms? How are the two terms different? I do not understand the difference between them.
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Changing .prop using jQuery does not trigger .change event
...and not when value is modified using code.
Here you need to use .change() or .trigger("change") after changing the property:
$('input[type="checkbox"][name="something"]').prop("checked", false).change();
Working Demo
sha...
JPA: How to have one-to-many relation of the same Entity type
...general case is detailed in Section 2.10.2 of the JPA 2.0 spec.
Here's a worked example. First, the entity class A:
@Entity
public class A implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
@ManyToOne
private A parent;
@OneToMany(...
Heroku error: “Permission denied (public key)”
I keep getting this error. I am using Mac. I generated a key and added it to heroku using
6 Answers
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Why can't I save CSS changes in Firebug? [closed]
Firebug is the most convenient tool I've found for editing CSS - so why isn't there a simple "save" option for CSS?
23 Answ...
Is the practice of returning a C++ reference variable evil?
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In general, returning a reference is perfectly normal and happens all the time.
If you mean:
int& getInt() {
int i;
return i; // DON'T DO THIS.
}
That is all sorts of evil. The stack-allocated i will go away and you are referring to nothing. This is also e...
How to compare arrays in JavaScript?
... are identical, and false if not. Not surprisingly, the comparison operator doesn't seem to work.
63 Answers
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PHP case-insensitive in_array function
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To make it a drop-in replacement for in_array, returning a bool, it becomes: count(preg_grep('/^'.preg_quote($needle).'/$',$a)>0). Not so elegant, then. (Notice the ^ and $ characters are required, unless partial matching is desired.) However if you actua...