Few days back, Amitoj asked me why doesn’t git fetch deletes the changes that are not present on remote but are present in local, when it does updates other changes. To explain it one need to understand the difference between git fetch + merge, git fetch + rebase and git pull and why we need to merge or rebase after a fetch and when? I tried searching for some good resources to explain the difference but I didn’t find anything good. So I thought of writing one.
First of all have a look at this image by Oliver Steele.
Continue reading “Git fetch + merge, Git fetch + rebase, Git pull”
In this post I’ll be writing about how to easily read the complicated C declarations like
char (*(*x()) ) ()
char (* (*x) ()) 
void (*f)(int,void (*)())
int **(*f)(int**,int**(*)(int **,int **));
Continue reading “Reading Complicated C Declarations”
This blog posts has instructions to boost up Vim.
Continue reading “Vim Bundles”
At time it takes a while to figure out the configure options like below
./configure --prefix=/a/b/c --with-X --with-Y \
--with-Z-dir=/usr/local/Z --enable-A --disable-B
and after some weeks or months, if there is a need to re use it and if you have the old build somewhere in home directory.
This will output the exact configure arguments that you used to configure the software.
This post is about how to install a new kernel from source.
The latest source code for the Linux kernel is kept on kernel.org. You can either download the full source code as a tar ball (not recommended and will take forever to download), or you can check out the code from the read-only git repositories.
Continue reading “Building and Installing a Kernel”
Valgrind is a tool for memory debugging, memory leak detection, and profiling. It is named after the main entrance to Valhalla.
Valgrind was originally designed to be a free memory debugging tool for Linux on x86, but has since evolved to become a generic framework for creating dynamic analysis tools such as checkers and profilers.
This post is about using Valgrind to debug memory leaks.
Continue reading “Debugging Memory Leaks using Valgrind”
This is the third part of the series Scrapping with Scrapy.
In this post I will covering how to use selenium with scrapy, how to change the template, that gets loaded when a new Scrapy project is created. You may need to read part 1 and part 2 of this series to understand more.
Continue reading “Scrapping with Scrapy : Part 3”