SEARCH KEYWORD -- Bad programmer
Valid JavaScript variable names
Did you know var π = Math.PI; is syntactically valid JavaScript? I thought this was pretty cool, so I decided to look into which Unicode glyphs are allowed in JavaScript variable names, or identifiers as the ECMAScript specification calls them. Reserved words The ECMAScript 5.1 spec says: An Identifier is an IdentifierName that is not a ReservedWord. The spec describes four groups of reserved words: keywords, future reserved words, null literals and boolean lite...
JavaScript,Name convention,Standard 2012-02-22 05:16:53
What It’s Really Like to Work at Google
Google. It’s one of the most common household words in today’s modern society, and yet for a company that is used by most of us essentially as an algorithm, it tends to trigger a highly emotional response when overheard. It’s a dream job for college students nearing graduation, a highly coveted invitation to lunch by friends and colleagues who work near campus, and the bane of existence for those who produce content for the Internet. For several years, most of the publ...
Rediscovering the RSync Algorithm
A:Ok, you’re synchronizing this over the web; and what do you use for the synchronization? B: Oh, we implemented the rsync algorithm. A: uhu. And what do you do with really big files? B: The same. A: And you also synchronise folders? B: Yes. A: And how do you do that? B: we iterate over the folder, using the algorithm on every file, recursing over subfolders. A: Can you try 2 things for me? First, a very large file; and second, a large codebase, and see if it holds. Introduction First ...
ReSync algorithm,Discovery 2012-02-14 10:47:24
Macro vs. Micro Optimisation
So there's recently been a bit of hype about another Colebourne article: http://blog.joda.org/2011/11/real-life-scala-feedback-from-yammer.html I'd like to respond to a few points he makes. First - You should evaluate Scala and pay attention to its benefits and flaws before adopting it. Yes, there are flaws to Scala. Working at typesafe makes you more aware of some of them. We're actively working to reduce/minimize/get rid of these. In my opinion, the negat...
Optimization,Performance,Micro,Macro,Software 2011-11-30 12:04:25
Don't Overload #nil?
There’s a popular post on Hacker News about writing confident code by, among other things, overloading Object#nil? and returning “null objects†instead of nil itself.DO NOT DO THIS.In Ruby, all objects (except nil itself) coerce to the boolean value true. Your object will be nil and true at the same time. Bad things will happen. Your coworkers will cry. Sad people from around the world will ask bewildering questions on your mailing list.Here’s what happen...
What matters in life (and what doesn’t)
I’m probably too young to be writing on this topic but observing countless souls distressed by daily life made me think hard on what is that really matters in life. Undoubtedly, there are happy and sad phases and that’s part-and-parcel of life. But what I’m really bothered about is general, daily bitching about how miserable one’s life has become. You find people complaining about work, commute, relationships, other people’s attitudes & personalit...
Life,Matater,Relationship,Experience,Material possession,Ego 2011-10-24 11:57:27
Software philosophy: Release early, release often vs polished releases
Release early, release often is a philosophy where you release the product as soon as possible and rapidly iterate it to perfection by listening to your customers. A polished release, on the other hand is where your product, in its initial version is solid, lacks obvious bugs and has just enough features to satisfy a majority of your consumers. Most software companies adopt either one of this and that choice is not superficial. In fact, it roots down to the heart of the company’s i...
Design philosophy,Release early,Release often,Polished relaese 2011-11-28 09:22:17
Lessons Learned while Introducing a New Programming Language
I've used a lot of languages (professionally) over the years: (off the top of my head) Cold Fusion, HTML, Javascript, php, SQL, CSS, ASP(classic & .net), C#, Ruby, Flex, Java, & Clojure. Each language has pros and cons. Being a programmer, it's easiest to discuss the cons - and in general I believe it was best said:I hate all programming languages - Matt FoemmelI think it's important to start with this in mind. At some point you're going to hate what you're advocating, so imagine h...
Experience,New language,Tips,Risk 2012-03-05 05:13:59
Java Interview Questions
Currently there are many articles online which summarize the list of Java interview questions. Some cover lots of basic questions and some cover some specific questions in specific area such as multithreading. In this post, we will not cover the really basic questions, we will cover something different. For basic question, you can read Java Interview Questions。 Basic What is primitive data type? How many primitive data types in Java? What are they? -- A primitive type is prede...
JAVA,SECURITY,INTERVIEW,CAREER,MULTITHREADING,QUESTION,JAVA INTERVIEW,JAVA CORE 2019-01-21 07:07:08
Python – parallelizing CPU-bound tasks with multiprocessing
In a previous post on Python threads, I briefly mentioned that threads are unsuitable for CPU-bound tasks, and multiprocessing should be used instead. Here I want to demonstrate this with benchmark numbers, also showing that creating multiple processes in Python is just as simple as creating multiple threads. First, let’s pick a simple computation to use for the benchmarking. I don’t want it to be completely artificial, so I’ll use a dumbed-down version of factorization...
Python,Multitasking,Multiprocessing,CPU bound 2012-01-17 11:38:22
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