Skip to main content

Programming from Scratch- Rareness

When you learn a programming language you usually develop small applications to analyze the pros and cons of the language. Another important part is to check the offer of available libraries, frameworks and last but not least the tool support.

Programming from scratch is the unusual way when you develop a software system. In Mike Taylers blog is a very interesting discussion about "Whatever happend to programming?". In former times we wrote compilers, operating systems and cool stuff like that. Today, the programming world is busy to look for libraries for any kind of problem and paste them together.
We did all those courses on LR grammars and concurrent software and referentially transparent functional languages. We messed about with Prolog, Lisp and APL. We studied invariants and formal preconditions and operating system theory. Now how much of that do we use? A huge part of my job these days seems to be impedence-matching between big opaque chunks of library software that sort of do most of what my program is meant to achieve, but don’t quite work right together so I have to, I don’t know, translate USMARC records into Dublin Core or something. Is that programming? Really?
Read more about this topic in his blog. I thing, especially in the Java and Open Source area, Frameworks help you to concentrate on the business case. Through to the adoption of such frameworks decrease the initial development time of new applications. But it also depends on your knowledge about the used technologies and libraries. Often it will be better to write parsers and utilty classes from scratch instead of using a open source library.
Labels:

Comments

Post a Comment

Your Comment Here!.....

Popular posts from this blog

CIVIL SERVICES' (I.A.S.) EXAMINATION

The Union Public Service Commission (U.P.S.C.)  conducts Civil Services' Examination once a year in two stages. The Preliminary Examination (Objective Type) for selection of candidates for the Main Examination is held in the month of May. The Civil Services Main Examination  is held in the months of October/November. Blank application forms and other particulars are published in the Employment News, generally in the month of December. The last date for the submission of applications to the Secretary, Union Public Service Commission, Dholpur House, Shahjahan Road, NewDelhi-11001 1 is usually the last week of January of the year of examination. The Combined Civil Services Examination is conducted for Recruitment to the following Services/Posts: 1. Indian Administrative Service. 2. Indian Foreign Service. 3. Indian Police Service. 4. Indian P & T Accounts & Finance Service, Group 'A'. 5. Indian Audit and Accounts Service, Group 'A'. 6. Indian Customs and Centr...
1 comment
Read more

Predict the output or error(s) for the following:

1 . void main(){ int const * p=5; printf("%d",++(*p)); } Answer: Compiler error: Cannot modify a constant value. Explanation: p is a pointer to a "constant integer". But we tried tochange the value of the "constant integer". 2. main() {  char s[ ]="man"; int i;  for(i=0;s[ i ];i++) printf("\n%c%c%c%c",s[i],*(s+i),*(i+s),i[s]); } Answer: mmmm aaaa nnnn Explanation: s[i], *(i+s), *(s+i), i[s] are all different ways of expressing the same idea. Generally array name is the base address for that array. Here s is the base address. i is the index number/displacement from the base address. So, indirecting it with * is same as s[i]. i[s] may be surprising. But in the case of C it is same as s[i]. 3 . main(){  float me = 1.1;  double you = 1.1;  if(me==you) printf("I love U"); else printf("I hate U"); } Answer: I hate U Explanation : For floating point numbers (float, double, long double) ...
Post a Comment
Read more

How do I "get" a null pointer in my programs?

Answer : According to the language definition, a constant 0 in a pointer context is converted into a null pointer at compile time. That is, in an initialization, assignment, or comparison when one side is a variable or expression of pointer type, the compiler can tell that a constant 0 on the other side requests a null pointer, and generate the correctly-typed null pointer value. Therefore, the following fragments are perfectly legal: char *p = 0; if(p != 0) However, an argument being passed to a function is not necessarily recognizable as a pointer context, and the compiler may not be able to tell that an unadorned 0 "means" a null pointer. For instance, the Unix system call "execl" takes a variable-length, null-pointer-terminated list of character pointer arguments. To generate a null pointer in a function call context, an explicit cast is typically required: execl("/bin/sh", "sh", "-c", "ls", (char *)0); If the (c...
Post a Comment
Read more