Linux Tip: grep for multiple words
Quick linux tip for grepping for multiple words at the same time. Use the -e option for each pattern that you want to match. If you wanted to search for all files containing either *html* or *script*:
Author: admin
Thoughts on Domain Driven Design
I recently had the chance to finish reading Eric Evans’ book ‘Domain-Driven Design’ and I figured I’d take some time to highlight some of the key concepts and takeaways from the material, both for the benefit of my future self and to also share my thoughts with the rest of the world. The overall flow […]
Java: CyclicBarrier – Explained
Oftentimes it’s necessary to write an application in which there are multiple threads that are mostly independent from one another, but require a sync up occasionally before proceeding. This is a great use case for a CyclicBarrier. It is called a Barrier because it prevents threads from proceeding, and it is called Cyclic because once […]
Java: FutureTask – Explained
Java FutureTasks are a great means of offloading a computation so that you can worry about it later, but they can be tricky to use. In this post we’ll dive into a few examples to explain the utility of this java feature. A bit on Callable Before understanding a FutureTask, we must first understand a […]
New Layout
It’s been a while since I’ve posted in the blog but I’ll doing so more this year. It’s starts today with a brand new site layout.
Linux Tip: ls with inode number
The common ‘ls’ command will allow you to display the inode numbers associated with each file in the directory. All that’s needed is supplying the ‘-i’ option. It will display the inode number right next to the file.
Linux Tip: Multiple Sed Instructions In One Command
It’s possible to run several commands in a sed one-liner. All you have to do is separate the instructions with a semicolon:
Scala and Play Framework Blogging at Adurolucis
I’ve been spending a lot of time diving into the Scala programming language as well as the Play Framework. Along with some others, I’ll be authoring posts, tutorials and tips regarding these two projects at adurolucis.
Linux Tip: Use sed to replace characters
Sed is often used to replace words in input, but did you know that you can replace a set of characters with another set of corresponding characters? This is accomplished by use of the ‘y’ command. It’s essentially the same as the ‘tr’ utility and works as follows: An example of replacing all uppercase vowels […]
Linux Tip: Display ‘ls’ Output In Columns
If you are redirecting the output of ls to a file, it will output a single file per line. Use the -C option to have ls output its usual column format