By Brian W. Kernighan, Rob Pike
With an analogous perception and authority that made their e-book The Unix Programming surroundings a vintage, Brian Kernighan and Rob Pike have written The perform of Programming to assist make person programmers more suitable and productive.
The perform of programming is greater than simply writing code. Programmers also needs to investigate tradeoffs, decide on between layout possible choices, debug and attempt, increase functionality, and hold software program written by means of themselves and others. whilst, they have to be anxious with matters like compatibility, robustness, and reliability, whereas assembly specifications.
The perform of Programming covers some of these issues, and extra. This booklet is filled with sensible suggestion and real-world examples in C, C++, Java, and a number of special-purpose languages. It comprises chapters on:
- debugging: discovering insects fast and methodically
- trying out: ensuring that software program works thoroughly and reliably
- functionality: making courses quicker and extra compact
- portability: making sure that courses run far and wide with no change
- layout: balancing objectives and constraints to choose which algorithms and knowledge constructions are best
- interfaces: utilizing abstraction and knowledge hiding to regulate the interactions among components
- type: writing code that works good and is a excitement to read
- notation: picking out languages and instruments that permit the computer do extra of the paintings
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Extra info for The Practice of Programming
Consider an example like this:
Is a naughty boy. We would like to throw away the text Is a naughty boy, so that it doesn’t appear in the result. But to walk_html(), it is just another plain text item, which looks exactly the same as Junior, which we don’t want to throw away. It might seem that we should simply throw away everything that appears inside a non-header tag, but that doesn’t work:
The story of Junior
We mustn’t throw away Junior here, just because he’s inside a tag, because that tag is itself inside an
tag, and we want to keep it.
1 Fibonacci Numbers Fibonacci numbers are named for Leonardo of Pisa, whose nickname was Fibonacci, who discussed them in the 13th century in connection with a mathematical problem about rabbits. Initially, you have one pair of baby rabbits. Baby rabbits grow to adults in one month, and the following month they produce a new pair of baby rabbits, making two pairs: Month 1 2 3 Pairs of baby rabbits 1 0 1 Pairs of adult rabbits 0 1 1 Total pairs 1 1 2 The following month, the baby rabbits grow up and the adults produce a new pair of babies: 4 1 2 3 The month after that, the babies grow up, and the two pairs of adults each produce a new pair of babies: 5 2 3 5 TEAM LinG 34 Recursion and Callbacks Assuming no rabbits die, and rabbit production continues, how many pairs of rabbits are there in each month?
For example, if we want to write a recursive file lister that works like the Unix ls -R command, we’ll need to walk the directory tree. We might want our function to behave more like the Unix du command, which prints out the total size of every subdirectory, as well as the total for all the files it found. We might want our function to search for dangling symbolic links; that is, links that point to nonexistent files. A frequently asked question in the Perl newsgroups and IRC channels is how to walk a directory tree and rename each file or perform some other operation on each file.
The Practice of Programming by Brian W. Kernighan, Rob Pike