Answer Posted / shoaib
sed is a stream editor. It works with streams of characters on a per-line basis. It has a primitive programming language that includes goto-style loops and simple conditionals (in addition to pattern matching and address matching). There are essentially only two "variables": pattern space and hold space. Readability of scripts can be difficult. Mathematical operations are extraordinarily awkward at best.
awk is oriented toward delimited fields on a per-line basis. It has much more robust programming constructs including if/else, while, do/while and for (C-style and array iteration). There is complete support for variables and single-dimension associative arrays plus (IMO) kludgey multi-dimension arrays. Mathematical operations resemble those in C. It has printf and functions. The "K" in "AWK" stands for "Kernighan" as in "Kernighan and Ritchie" of the book "C Programming Language" fame (not to forget Aho and Weinberger). One could conceivably write a detector of academic plagiarism using awk.
Both programs use regular expressions for selecting and processing text.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Explain about busy waiting?
Explain the difference among deadlock avoidance, detection and prevention?
some os have a tree structure file system that limits the depth of a tree and small number of levels.what limit does this have on user? how does this simplify file system design?
What are the reasons for implementing process migration?
Tell me what are the hardware problem you face regularly in your organization?
Can you tell which dlls are used for SDK?
What items of information about a task might be useful in real time scheduling?
absolute path gives the location a file or directory in reference to a rile directory while relative path is a path given file starting from another file. explain?
What is direct mount and indirect monut?
Explain where the system time is stored? In processor or in separate timer ic for that?
Tell me why register are stored the only binary data?
Explain about dynamic memory allocation algorithm?
If you do not have cd drive then how will you format c drive?
if you are using external package for configuring send mail what is the name of the package?
If you do not have cd drive then how will u format c drive?