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Generic array factory in Java: receipt for disaster | Michid's Weblog

https://michid.wordpress.com/2010/11/04/generic-array-factory-in-java-receipt-for-disaster

Generic array factory in Java: receipt for disaster. Let’s implement a generic factory method for arrays in Java like this:. Static T T[] createArray(T. t) { return t; }. We can use this method to create any array. For example an array of strings:. String[] strings = createArray(some, thing);. Now let’s add another twist:. Static T T[] crash(T t) { return createArray(t); } String[] outch = crash(crash, me);. Running this code will result in a ClassCastException on the last line:. Along the same lines.

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Meta-Programming with Scala Part III: Partial function application | Michid's Weblog

https://michid.wordpress.com/2008/08/27/meta-programming-with-scala-part-iii-partial-function-application

Meta-Programming with Scala Part III: Partial function application. In my previous post. I suspected that there was no way to express partial function application in Scala’s type system. However Matt Hellige. Proofed me wrong in his comment. His solution uses a trait. For partially applying a function to some of its arguments. An abstract type. Exposed by the trait represents the resulting function which takes the remaining arguments. A full working example is available from my code page. 8230;] Level Pr...

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Meta-Programming with Scala Part II: Multiplication | Michid's Weblog

https://michid.wordpress.com/2008/07/30/meta-programming-with-scala-part-ii-multiplication

Meta-Programming with Scala Part II: Multiplication. This was sitting on my desk for quite a while now while I was busy with other things. Finally I came around to write things up. In my last post. I showed how to encode the Church numerals. And addition on them with Scala’s. Define a lambda term for each natural number n. Stands for the n. Fold application of s. Standing for successor and z. For zero. Then the number n. Is simply the n. Fold successor of zero. Addition can now be define as. Fold success...

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Regular expression matching in <100 lines of code | Michid's Weblog

https://michid.wordpress.com/2010/12/06/regular-expression-matching-in-100-lines-of-code

Regular expression matching in 100 lines of code. The recent discussion about the Yacc is dead. Paper on Lambda the Ultimate. Sparked my interest in regular expression derivatives. The original idea goes back to the paper Derivatives of Regular Expressions. Published in 1964 (! By Janusz A. Brzozowski. For a more modern treatment of the topic see Regular-expression derivatives reexamined. Which generates the language. One can derive a regular expression. The exact algorithm for finding whether a regular ...

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Json Jerk: a flexible JSON parser | Michid's Weblog

https://michid.wordpress.com/2011/12/09/json-jerk-a-flexible-json-parser

Json Jerk: a flexible JSON parser. I just pushed Json Jerk. To Github. Json Jerk is a flexible and fast JSON parser written in Java. It consists of several composable parts for tokenizing, (un)escaping, parsing, and handling of semantic actions. Furthermore it provides a light weight and type safe object model for JSON documents. Details and examples are in the readme. And in the test cases. I renamed the parser from Flex Json to Json Jerk due to a name clash with an existing project. Laquo; Union types.

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random programmable thought bubbles on java javascript occasional css even php - Archive - Uncategorized

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Java Visitor Pattern and the Expression Problem – part 2 : Object Algebra Approach. April 10th, 2012 Posted by admin. In the previous post I presented a Visitor Pattern. Framework adaptation that solves the Expression Problem. But nice as it was it has its limitations and and drawbacks which I detailed at the end of the post. In this post I’ll explore a Visitor pattern implementation with Object Algebras. The solution is actually quite straight-forward adaptation of a solution presented in a paper called.

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Java Visitor Pattern and the Expression Problem – part 1 : Framework Based Approach - random programmable thought bubbles on java javascript occasional css even php

http://www.anzaan.com/2012/04/java-visitor-pattern-and-the-expression-problem-part-1-framework-based-approach

Java Visitor Pattern and the Expression Problem – part 1 : Framework Based Approach. April 10th, 2012 Posted by admin. But Visitor pattern has its own extensibility issue. If a new subclass is added then the Visitor interfaces have to be changed to add operation for the new subclass and the implementations have to be changed to accommodates the newly added class. There has been quite a lot of attempts to solve this dilemma of date-centric and operation-centric approach in various languages. Using a visit...

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Chris Mountford: Activate Remote Disc with Command Line on MAC OSX

http://blog.chromosundrift.com/2013/01/activate-remote-disc-with-command-line.html

Another layer of abstraction. Activate Remote Disc with Command Line on MAC OSX. On Macs without a DVD drive (i.e. everything these days) OSX is configured to easily allow use of a "Remote Disc" wherever another machine has enabled DVD/CD sharing. Fortunately these preferences can be turned on with a command line as follows:. Defaults write com.apple.NetworkBrowser ODSSupported -bool true. Defaults write com.apple.NetworkBrowser EnableODiskBrowsing -bool true. Using the Force Quit. 14 March, 2015 14:24.