Solved

What is this

Posted on 2000-03-01
5
157 Views
Last Modified: 2013-12-25
I have been looking at job ads and have found statements like the following:

Must be able to write high
performance, reliable, maintainable code in a production environment.

What exactly are they talking about here?  What makes code 'high performance'? What makes it "maintainable"

Thanks for the help,
David
0
Comment
Question by:davlun20080
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 19

Accepted Solution

by:
cheekycj earned 50 total points
ID: 2576848
maintainable code is code that can be maintained by people besides you and can be updated easily.  Basically what they are saying is that your coding style cannot be such that no one but you understands it (whether it works or not is a different story)

High performance code is code that is written for speed and efficiency both in execution and memory usage... examples:  efficient usage of memory pointers in C++ and using malloc() properly.  Another example is not creating "new" object for everything in Java which is slower and a memory hog.

Efficient code for Java is like using BufferedReader vs. FileReader
Another example of efficient code is using a switch statement vs a looping if then else

CJ
0
 
LVL 3

Author Comment

by:davlun20080
ID: 2577198
Guess I should have prefaced this by saying I am looking at coding in html, javascript and asp.  So if I understand right, the code needs to be able to be read by someone else easily, does this mean commented well or does it mean the page is laidout logically.

Thanks for the pointer on the switch statment vs for..loop.  I assume that is Javascript applicable as well.  This is exactly the kind of information I am looking for, anything else?
0
 
LVL 19

Expert Comment

by:cheekycj
ID: 2577555
comments are only half the story.. your comments should explain what you are doing but keep in mind what you are doing shouldn't take a mind reader to figure out.

for example:
to sort some data take a given approach like bubble sort or quick sort but some people like to write their own version of a sort that only they can understand and once they leave the company either spends too much time learning how he did it or they spend all this money to do it again from scratch.
(sorting isn't the best example but it should give you an idea)

When it comes to organizing your code you should always have it so it is easy to read and logistically simple.  Remember the rule: KISS- Keep it Simple Stupid (Silly)

Basically anything that is applicable to programming in general is applicable to JavaScript, Java, VBScript, JScript, PHP, Perl, C, C++ or any other language you may be using.

I have found optimiztions such as the following in java:
To compare two strings I was first trimming them then checking if they were equal and then return true or false when the optimized code in java looked like:
return (firstStr.trim()).equals(secondStr.trim());

One line replace 5 lines including and if then else.

I found out that in Java using the + concatenator uses more memory then the stringbuffer.append() command.

Other things like memory management (malloc in C and System.gc in Java) are essential to good clean up code.

CJ
0
 
LVL 19

Expert Comment

by:cheekycj
ID: 2577572
0
 
LVL 3

Author Comment

by:davlun20080
ID: 2578582
Thanks for the info,
davlun
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Does your audience prefer people in photos or no people? How can you best highlight what you’re selling? What are your competitors doing, and what can you do that is different and unique from them?  Continue reading to learn how to make your images …
Today, the web development industry is booming, and many people consider it to be their vocation. The question you may be asking yourself is – how do I become a web developer?
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.
The viewer will get a basic understanding of what section 508 compliance can entail, learn about skip navigation links, alt text, transcripts, and font size controls.

736 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question