>>> blog = blog + ["Entry moi"]
>>> blog
['Entry dau tien', 'Python that tuyet', 'Entry moi']

>>> def add_entry(blog, new_entry):
... return blog + [new_entry]
...
>>>

>>> blog = add_entry(blog, "Entry thu 4")
>>> blog
['Entry dau tien', 'Python that tuyet', 'Entry moi',
'Entry thu 4']
>>>

>>> def add_entry(blog, new_entry):
... blog = blog + [new_entry]

>>> blog = []
>>> blog = add_entry(blog, ("Blog moi", "Entry dau tien"))
>>> blog = add_entry(blog, ("Tuyet ", "Python that tuyet"))
>>> blog
[('Blog moi', 'Entry dau tien'),
('Tuyet', 'Python that tuyet')]
>>>

>>> (1,2,3)
(1, 2, 3)

sudo apt-get install python

./configure --prefix=/opt/python2.4/
make
make install

$ python
Python 2.4.3 (#1, Sep 1 2006, 18:35:05)
[GCC 4.1.1 (Gentoo 4.1.1)] on linux2
Type "help", "copyright", "credits" or "license" for
more information.
>>>

>>> 5
5

>>> 10 + 4
14

>>> [1,3,2]
[1, 3, 2]

>>> [1,3,2] + [11,3,2]
[1, 3, 2, 11, 3, 2]

>>> ["Entry thu nhat", "Python that tuyet"]
['Entry thu nhat', 'Python that tuyet']
>>>

>>> blog = ["Entry thu nhat", "Python that tuyet"]
>>>

>>> blog
['Entry thu nhat', 'Python that tuyet']

>>> blog[0]
'Entry thu nhat'
>>> blog[1]
'Python that tuyet'

f="f=%p;puts f%%f";puts f%f

ruby -e 'f="f=%p;puts f%%f";puts f%f' | ruby

class Person
attr_accessor :name
end

class Person
def name
@name
end
def name=(new_name)
@name = new_name
end
end

cls.define_method(name) { body }

obj.instance_variable_set(name, value)

require 'generator'
class Object
def Object.attr_initialize(*attrs)
define_method(:initialize) do |*args|
if attrs.length != args.length
raise ArgumentError,
"wrong number of arguments " +
"(#{args.length} for #{attrs.length})"
end
SyncEnumerator.new(attrs, args).each do
|attr, arg|
instance_variable_set("@#{attr}", arg)
end
end
attr_accessor *attrs
end
end

class Student
attr_initialize :name, :id, :address
end
s = Student.new('Erika', 123, '13 Fake St')
s.address = '13 Wrong Rd'
puts s.name, s.id, s.address

Erika
123
13 Wrong Rd

MODE=5a
XRESO=1280
YRESO=768

sudo /usr/sbin/915resolution 5a 1280 768

exit 3

INPUT_FILE_NAME = 'ljlogo.png'
OUTPUT_FILE_NAME = 'ljlogo.h'
DATA_VARIABLE_NAME = 'ljlogo'
File.open(INPUT_FILE_NAME, 'r') do |input|
File.open(OUTPUT_FILE_NAME, 'w') do |output|
output.print "unsigned char #{DATA_VARIABLE_NAME}[] = {"
data = input.read.unpack('C*')
data.length.times do |i|
if i % 8 == 0
output.print "\n "
end
output.print '0x%02X' % data[i]
output.print ', ' if i < data.length - 1
end
output.puts "\n};"
end
end

unsigned char ljlogo[] = {
0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A,
0x00, 0x00, 0x00, 0x0D, 0x49, 0x48, 0x44, 0x52,
/* Khoảng vài trăm dòng ở đây. */
0x0B, 0x13, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45,
0x4E, 0x44, 0xAE, 0x42, 0x60, 0x82
};

#include <stdio.h>
#include "ljlogo.h"
/* In dữ liệu của mảng ljlogo theo các giá trị byte hexadecimal . */
int main(void) {
int i;
for (i = 0; i < sizeof(ljlogo); i++) {
printf("%X ", ljlogo[i]);
}
return 0;
}

x = 3
s = 'x + 1'
puts eval(s)

puts eval((1..100).to_a.join('+'))

#include <stdio.h>
int main(void) {
printf("1. Toi khong duoc phep chat trong lop.\n");
printf("2. Toi khong duoc phep chat trong lop.\n");
/* 996 chi dan printf. */
printf("999. Toi khong duoc phep chat trong lop.\n");
printf("1000. Toi khong duoc phep chat trong lop.\n");
return 0;
}

File.open('trungphat.c', 'w') do |output|
output.puts '#include <stdio.h>'
output.puts 'int main(void) {'
1.upto(1000) do |i|
output.puts " printf(\"#{i}. " +
"Toi khong duoc phep chat trong lop.\\n\");"
end
output.puts ' return 0;'
output.puts '}'
end

/* Simple C program that connects to MySQL Database server*/
#include <mysql.h>
#include <stdio.h>
main() {
MYSQL *conn;
MYSQL_RES *res;
MYSQL_ROW row;
char *server = “localhost”;
char *user = “root”;
char *password = “PASSWORD”; /* set me first */
char *database = “mysql”;
conn = mysql_init(NULL);
/* Connect to database */
if (!mysql_real_connect(conn, server,
user, password, database, 0, NULL, 0)) {
fprintf(stderr, “%s\n“, mysql_error(conn));
exit(1);
}
/* send SQL query */
if (mysql_query(conn, “show tables”)) {
fprintf(stderr, “%s\n“, mysql_error(conn));
exit(1);
}
res = mysql_use_result(conn);
/* output table name */
printf(“MySQL Tables in mysql database:\n“);
while ((row = mysql_fetch_row(res)) != NULL)
printf(“%s \n“, row[0]);
/* close connection */
mysql_free_result(res);
mysql_close(conn);
}

$ mysql_config --libs

-L/usr/lib64/mysql -lmysqlclient -lz -lcrypt -lnsl -lm -L/usr/lib64 -lssl -lcrypto

$ mysql_config --cflags

-I/usr/include/mysql -g -pipe -m64 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-strict-aliasing

$ gcc -o output-file $(mysql_config –cflags) mysql-c-api.c $(mysql_config –libs)

$ ./output-file
Kêt quả:
[code]
MySQL Tables in mysql database:
columns_priv
db
func
help_category
help_keyword
help_relation
help_topic
host
tables_priv
time_zone
time_zone_leap_second
time_zone_name
time_zone_transition
time_zone_transition_type
user

# vi httpd.conf

LoadModule deflate_module modules/mod_deflate.so

<Location />
AddOutputFilterByType DEFLATE text/html text/plain text/xml
....
...
<Location>

<Location />
...
...
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE image/svg+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/atom_xml
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/x-httpd-php
AddOutputFilterByType DEFLATE application/x-httpd-fastphp
AddOutputFilterByType DEFLATE application/x-httpd-eruby
AddOutputFilterByType DEFLATE text/html
...
...
<Location>

<Directory "/thu/muc">
AddOutputFilterByType DEFLATE text/html
</Directory>

SetOutputFilter DEFLATE
SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.(?:exe|t?gz|zip|bz2|sit|rar)$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.pdf$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.avi$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.mov$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.mp3$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.mp4$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.rm$ no-gzip dont-vary