Learning Bison and Flex: The calculator - 2016-08-20 18:28:25

Hello everynyan, I’m learning how Bison and Flex work with an O’Reilly book and there can be found an example on how to build a calculator (which has an error on the code, probably there are more in the book, that’s why it has that kind of critics, but it works.). I ended up making an extension on it just to test my forgotten grammar skills. The code is the following:

Understanding asMSX Volume 2: lex.l - 2016-08-19 23:27:42

Welcome back to the mystery machine! Today, the spooky lex.l. As we saw in the previous post this file is full with constants, but to be more precise this is the file where you tell how to treat every string found. In fact, constants are not defined in this file but in dura.y, For example: “ld return MNEMO_LD”: Whenever you find a string that’s which characters ld, treat is as a token with value MNEMO_LD (Mnemotechnic for Load instruction).

Understanding asMSX Volume 1: Understanding the structure of the code - 2016-08-16 23:00:08

Hello! Welcome to another trip into another dark cave. Today we meet asMSX, an assembler for MSX’s Z80 made by Pitpan and bought and released with GPL license by cjv99 (Thanks!). Motivation It’s known that this assembler has some bugs, e.g. skipping IFDEFs when using MegaROM so there is an interest on knowing the internals of the code in order to fix this kind of bugs. My goal is not directly fixing bugs of this code but to provide more information about the code so all the people from the community may get themselves the code and fix it if there are any new bugs.

On R and parallelism - 2016-03-24 01:20:01

R, that language that is has gained its momentum due to the people discovering the need of analyzing data. There are other several alternatives but this is my poison (or poisson!) of choice. In this post we will try to cover how to parallelize your R code with the package parallel.  Why bother? One of my main concerns when I was starting with R is that “WOW! Everything runs in one thread!