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  Efficiency of code execution

If you want to optimize your program codes, you need to find their Hotspot, i.e, the codes which are executed most frequently. If you can optimize this portion of codes a bit, you may gain much improvement of your code efficiency. Here I give you three examples about efficiency of code execution.1. PHP's Getter and Setter (From Reddit)This example a quite simple, you can skip it if you want.Consider the code below, we can find it's slower when we use Getter/Setter method to read a member variabl...

   Code, Efficiency,Analysis,Trick     2012-07-13 10:59:21

  Learn How to Write iOS Apps

My friend contacted me on twitter and asked for advice on different sources on how to learn iOS apps. Since this paragraph will already exceed 140 characters, I'm posting here, instead. (Obviously, reading this blog regularly is a great way to pick up some iOS development tricks) To get started, some people buy a book or find some good online tutorials. I tried both approaches, and the online tutorials were definitely better. I found Stanford's class on iPhone Development, available for free...

   IOS App,Tutorial,Advice,Resource     2011-12-25 00:58:25

  How Duff’s Device Works

I like C, but I have to admit that, sometimes, “The Old Man of Programming” can be a bit of a killjoy. This is one of the most exciting eras in computer history, but lately, C’s acting like he doesn’t evenwant to have a good time. While the cool kids like Ruby and Haskell are living it up, C’s over in the corner obsessing over bits and bytes and memory alignment and pointers and the stack and machine architecture and unreachable allocations and multiple indi...

   Duff device,Algorithm,Switch,Case     2011-05-27 14:10:18

  How One Missing `var` Ruined our Launch

Well, that was a veritable shitstorm (sorry for the language).  Long story short, MelonCard was featured today on TechCrunch (along with other500Startups companies, also on VentureBeat, Forbes, …) and everything broke all at once.  Every. little. thing.  We had rolled out a huge change to MelonCard over the last few days to make our site a seamless “everything just updates” look-good / feel-good product using NodeJS lo...

   JavaScript,NodeJs,jQuery,Variable,Scope,Global     2011-11-02 13:01:22

  Why Good Programmers Are Lazy and Dumb

I realized that, paradoxically enough, good programmers need to be both lazy and dumb. Lazy, because only lazy programmers will want to write the kind of tools that might replace them in the end. Lazy, because only a lazy programmer will avoid writing monotonous, repetitive code – thus avoiding redundancy, the enemy of software maintenance and flexible refactoring. Mostly, the tools and processes that come out of this endeavor fired by laziness will speed up the production. This ma...

   Good programmer,Lazy,Reason,Dumb     2012-04-18 07:15:23

  Making Your Tech Conference Presentation, and Experience, Not Suck

Tech conferences are incredibly expensive, and not just in dollars. Even free conferences like BarCamps incur the expense of the attendee’s time. Taking time off from work or family is a hassle at the very least, and it’s time that isn’t billable. The draw of the conference boils down to those 45 minute sessions, and speaker and attendee alike should make the most of it. Speakers often start off by wasting time. They front-load the presentation with worthless informatio...

   Soft skill,Tech presentation,Advice,Highlight     2011-12-20 08:50:00

  Never create Ruby strings longer than 23 characters

Looking at things through a microscopesometimes leads to surprising discoveries Obviously this is an utterly preposterous statement: it’s hard to think of a more ridiculous and esoteric coding requirement. I can just imagine all sorts of amusing conversations with designers and business sponsors: “No… the size of this <input> field should be 23… 24 is just too long!” Or: “We need to explain to users that their subject lines should be les...

   Ruby,Specification,String,Interpreter,Optimization,23     2012-01-05 07:58:07

  SQL Server: Removing Deprecated Code and Future Proofing your Queries

New features are added with every release of SQL Server and as a result, some features get removed or deprecated. Deprecated features are features that are still operational (for backward compatibility) but will be removed in a future version. Deprecated features can be of two types: those that will be deprecated in a future version and those that will be deprecated in the next version.In this article, we will explore how to track deprecated code and correct it. I will also share our observation...

   SQL Server,Microsoft,MS SOL,Proof query,Remove redundancy     2011-10-17 11:14:49

  Don't write on the whiteboard

I recently interviewed at a major technology company. I won't mention the name because, honestly, I can't remember whether I signed an NDA, much less how strong it was.I did well. Mostly because of luck. I normally step over myself when I interview. I guess I've improved over the years. Here are a few tips to ace your own interview.1. Don't write on the whiteboardWhen I interviewed at Palantir around 5 years ago, I had a lot of trouble with this. Yes, I knew next to nothing about compu...

   Interview,Preparation,Whiteboard,Note,Python     2012-01-11 11:31:32

  10 Secrets of Successful Leaders

Eleanor Roosevelt once said, “A good leader inspires people to have confidence in the leader, a great leader inspires people to have confidence in themselves.” But, becoming a great leader isn’t easy. Successfully maneuvering a team through the ups and downs of starting a new business can be one of the greatest challenges a small-business owner faces.Leadership is one of the areas that many entrepreneurs tend to overlook, according leadership coach John C. Maxwell, whose books...

   Leader,Skill,Calm,Trust,Involvement     2011-11-03 03:36:56

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