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Author Archives: hedleyproctor
Cool Groovy features 3 – ConfigSlurper
In Java configuration properties can only be key-value pairs e.g. Wouldn’t it be nice to be able to group configuration properties? This is exactly what you can do in Groovy using the ConfigSlurper class. It allows you to write config … Continue reading
Using group by without an aggregate function
It is interesting to find that in MySQL, you can write the following: This doesn’t really make sense, since the purpose of “group by” is to group records when you are using an aggregate function, such as sum. e.g. If … Continue reading
Coffeescript – improved javascript
An interesting attempt to create a more powerful syntax for javascript: http://jashkenas.github.com/coffee-script/
Groovy – real life example
In my job we often have spreadsheets of data that we want to quickly turn into SQL scripts. (Yes, I know there are plenty of ways of importing spreadsheets into databases, but our DBAs want SQL scripts!) This is fairly … Continue reading
Spring MVC versus Struts
This question is often asked, but tends to be answered by people who have a strong allegiance to Spring and tend to give a massive list of advantages, which often boil down to a much smaller list of actual advantages. … Continue reading
Cool Groovy features 2 – closures
A closure is a block of code (i.e. a function). In Java, to define a block of code, you would have to write a method or a class, but in Groovy you can write a closure and assign it to … Continue reading
Cool Groovy features 1 – no need for getters and setters
Consider the following Java code: public class Customer{ private int id; private String firstName; private String lastName; public void setId(int id){ this.id = id; } public void setFirstName(String firstName){ this.firstName = firstName; } public void setLastName(String lastName){ this.lastName = lastName; … Continue reading
Groovy
One of the technologies I’ve been playing around with recently is the Groovy language. It’s an interesting language as it offers a number of features not found in Java. Some of the these are features of the language itself, some … Continue reading
Hiding table columns with jQuery
A nice example of hiding a table column using jQuery is here: http://www.devcurry.com/2009/07/hide-table-column-with-single-line-of.html That example shows how to hide a single column. How might you do it if you have a row of tickboxes, one for each column? Here is … Continue reading
Printing Ant classpaths
Debugging Ant classpaths can be a bit of a pain, but the following link shows you how to print them out: http://www.javalobby.org/java/forums/t71033.html Even better, you can do a pretty version using: http://blog.andrewbeacock.com/2005/08/pretty-printing-java-classpaths-using.html