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String, StringBuffer, and StringBuilder
... a single thread then it is better to use StringBuilder. StringBuilder is more efficient than StringBuffer.
Situations:
If your string is not going to change use a String class because a String object is immutable.
If your string can change (example: lots of logic and operations in the constructi...
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...
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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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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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...
DisplayName attribute from Resources?
...plication, and I am wondering if it is possible to have the DisplayName for a certain model property set from a Resource.
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ASP.NET MVC 3 Razor - Adding class to EditorFor
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Adding a class to Html.EditorFor doesn't make sense as inside its template you could have many different tags. So you need to assign the class inside the editor template:
@Html.EditorFor(x => x.Created)
and in the custom template:
<div>
...
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(...
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...