These pages are examples of various things, mostly computer codes.

• Standardise Go function comments (28 June 2023)
• Stopping a web server using a web request (13 March 2023)
• Read directory (24 November 2022)
• Generate gaussian (2 August 2022)
• Dealing with zero-length non-empty form values in Go (6 June 2022)
• Read a file into an array of lines in Go (17 May 2022)
• Redirect os.Stderr in Go (16 May 2022)
• A star pattern in SVG (12 June 2021)
• Net interfaces (30 March 2021)
• Removing elements from the middle of a slice (24 February 2021)
• Generating the illustration for Damerau-Levenshtein explained (16 April 2020)
• C implementation of the Fisher-Yates shuffle (12 August 2018)
• An example of using pipe and fork in C (18 December 2017)
• Initialise and evaluate a map from strings to strings in Go (28 July 2017)
• The Boyer-Moore string matching algorithm in C (28 May 2017)
• Template glob funcs (18 March 2017)
• Parse and create HTTP format timestamps in C (5 March 2017)
• Parse and create HTTP format timestamps in C (5 March 2017)
• An example of atexit in C (25 February 2017)
• Copy chmod permissions from one file to another (13 February 2017)
• Get the line number of a regex match (10 February 2017)
• Distinguish binary and text files in C (2 February 2017)
• Example implementation of the Knuth-Morris-Pratt algorithm in C (30 January 2017)
• Debugging message routine with line directives (19 January 2017)
• How to decode broken doubly-encoded UTF-8 in Perl (13 January 2017)
• Make a list of colours with HTML::Make (5 January 2017)
• Convert JSON to HTML with JSON::Parse and HTML::Make (5 January 2017)
• Wikipedia article titles in different languages (24 December 2016)
• Test the size of integers in the preprocessor (29 November 2016)
• Some examples of Japanese braille or "tenji" (28 November 2016)
• An example of dying with a hash value in Perl XS (16 November 2016)
• A C program which gets information about itself (20 October 2016)
• An example of Cairo and FreeType in C (6 October 2016)
• reCAPTCHA example in Perl (21 September 2016)
• Get the last day of a month (9 September 2016)
• Array of different types (8 September 2016)
• Put a JSON object into map[string]string directly in Go (8 September 2016)
• Get mime type (31 August 2016)
• Override the mime type of the Go HTTP file server (30 August 2016)
• Draw a coloured graph of three phases (29 August 2016)
• Regexp replace pattern (29 August 2016)
• Substitute a URL in text using a regular expression (26 August 2016)
• Extract some of the files from a dump using restore (25 August 2016)
• Delete .xvpics directories safely (24 August 2016)
• Compressing CGI output with Perl and Gzip::Faster (23 August 2016)
• Get the file number associated with a FILE pointer (14 August 2016)
• Get QR code data from a png scalar (2 August 2016)
• Simple C macros for the Test Anything Protocol (29 July 2016)
• An example of using va_copy (29 July 2016)
• Example of reading a PNG file (23 June 2016)
• A file server with sorted directory listing in Go (1 February 2016)
• Gzip handler in Go (24 January 2016)
• Example of calling printf from assembly on FreeBSD (9 November 2015)
• Hello world example in x86 assembly language for FreeBSD (9 November 2015)
• Line directives in Go (27 October 2015)
• Example of a Go program which reads URL parameters and prints them out (27 October 2015)
• Simplest example of web server printing "Hello world" in Go (27 October 2015)
• Get a varargs-like vprintf or vfprintf in Go (28 September 2015)
• Make an error from a string in Go (13 September 2015)
• Pop from slice (13 September 2015)
• C program to delete files which match a pattern (4 April 2015)
• Cgi and file server (13 August 2014)
• Negative numbers and the modulo operator in C (8 August 2014)
• Convert a rune to a string in Go (3 August 2014)
• Testing for an undefined string in Go (2 August 2014)
• Convert type (31 July 2014)
• Raw strings (31 July 2014)
• map of list of strings (30 July 2014)
• Get the first rune of a string in Go (29 July 2014)
• Example of converting hexadecimal to integer in Go (29 July 2014)
• An example of a struct in Go (29 July 2014)
• Example of initializing an array of strings in Go (27 July 2014)
• Sort an array of strings by length (27 July 2014)
• Read a tab-separated file into a map (26 July 2014)
• Example of converting hiragana to katakana in Go (24 July 2014)
• Example of converting utf8 to a rune (integer) (24 July 2014)
• Example of looping over runes in a string in Go (24 July 2014)
• Send an HTTP OPTIONS request (18 July 2014)
• How to split a git repository (13 April 2014)
• How to convert colours from RGB to hue values (6 January 2014)
• Perl Cairo tutorial (30 September 2013)
• Entropy of discrete probabilities in Perl (27 March 2013)
• A variable-length list of arguments in Perl XS (22 March 2013)
• An example of using malloc (7 March 2013)
• Convert an IP address to an integer in C (25 February 2013)
• Examples of right-to-left writing in Japan (21 February 2013)
• C example program for hello world (7 February 2013)
• A basic example of parsing HTML in Perl (31 January 2013)
• Similarities and differences between pointers and arrays in C (19 November 2012)
• Normal probability distribution in Octave (10 November 2012)
• An example of mmap for a read-only file (3 August 2012)
• Using a C structure as a Perl object with XS (7 July 2012)
• Levenshtein edit distance with a maximum (23 June 2012)
• Having a method with the same name as a builtin (24 May 2012)
• Print part of a string with printf (3 May 2012)
• How to skip tests with Test::More (18 March 2012)
• Algorithm to convert katakana to hiragana in UTF-8 (30 September 2011)
• Strip leading and trailing space in C (26 September 2011)
• Calculate the Levenshtein edit distance in C (20 September 2011)
• Print today's date in C (12 September 2011)
• An example of pointer arithmetic (11 September 2011)
• Read a compressed file with gzFile, gzopen, and gzread in C (9 September 2011)
• Open and read a gzip compressed file with zlib in C (9 September 2011)
• An example of compressing with zlib in C (9 September 2011)
• Example of insertion sort in C (8 September 2011)
• Example of quicksort in C (7 September 2011)
• Program to reverse a string without using the string library (7 September 2011)
• Calculate Armstrong numbers in C (19 August 2011)
• Convert decimal to binary in C (19 August 2011)
• Find the largest of n numbers in C (19 August 2011)
• Pointers in C with examples (18 August 2011)
• Generate a Fibonacci series in C (18 August 2011)
• List the files in a Unix directory with C (18 August 2011)
• Example program in C to detect palindromes (18 August 2011)
• Get a list of prime numbers in C (18 August 2011)
• Recursively list directories in C (18 August 2011)
• Example of C if statement (17 August 2011)
• Compare strings ignoring case in C (17 August 2011)
• An example of an inline qsort (17 August 2011)
• Example of random number generation in C (17 August 2011)
• Example of command-line arguments in C (13 August 2011)
• Get the size of a file in C (13 August 2011)
• Example of getopt in C (13 August 2011)
• Read a whole file into memory in C (13 August 2011)
• Binary search in C using bsearch (10 August 2011)
• Show the types of all the ASCII characters (10 August 2011)
• Example of a doubly-linked list in C (10 August 2011)
• Find a substring of a string in C (10 August 2011)
• Example of a singly-linked list in C (10 August 2011)
• An example of array initialization in C (9 August 2011)
• Length of array in C (9 August 2011)
• Sort an array of strings in C (9 August 2011)
• Printf, doubles and decimal places (9 August 2011)
• Print hexadecimal versions of numbers in C (9 August 2011)
• Left-justify printf output (9 August 2011)
• Convert a string to a double in C (9 August 2011)
• Convert a string to an integer in C (9 August 2011)
• An example of using regular expressions in Perl XS (18 June 2011)
• The C string library (30 May 2011)
• Make a reentrant parser with Flex and Bison (26 May 2011)
• C macros __LINE__, __FILE__ and __func__ (14 May 2011)
• Get a hash value using XS (30 March 2011)
• Split a C string on whitespace (20 February 2011)
• Set the modification time of a PNG (29 December 2010)
• Converting Cairo output to PNG (28 December 2010)
• Create a PNG with text segments (28 December 2010)
• Write a PNG file using C and libpng (27 December 2010)
• Compressing CGI output with Perl (19 December 2010)
• Showing the modified time of an HTML page using JavaScript (12 December 2010)
• Print sizes of all images in a directory (11 November 2010)
• What characters are illegal in a Unix filename? (9 November 2010)
• C function pointer to function with varying number of arguments (28 October 2010)
• Convert X bitmaps (.xbm) to PNG - example of Pozkanzer tools (12 October 2010)
• IPC::Run3 for testing binaries (10 October 2010)
• Xlib window which tells its own position and size (3 October 2010)
• Responding to resize events with Xlib (3 October 2010)
• A simple text window using Xlib (3 October 2010)
• Responding to window deletion messages from the window manager (3 October 2010)
• SQLite C example: bind data (20 September 2010)
• An example of using regular expressions in C (14 September 2010)
• An example of ualarm and setjmp (12 September 2010)
• A simple "die" function for C - example of variable number of arguments (11 July 2010)
• SQLite C example: insert data (9 June 2010)
• SQLite C example: select data (9 June 2010)
• Example of ptrace for FreeBSD (30 October 2009)
• An example of iconv (9 September 2009)
• Visit all cells in an Excel worksheet (29 August 2009)