ruby Bignum Dir ѧϰ
Bignum
+ ¼Ó
- ¼õ
* ³Ë
/ ³ý
** Ö¸Êý²Ù×÷2**2 Òâ˼ÊÇ2µÄƽ·½
<=> ´óÓÚ,µÈÓÚ,СÓÚ 1,0,-1
== ÅжÏÏàµÈ
abs ¾ø¶ÔÖµ
Continuation ÔÝʱ²»ÖªµÀÔõôÓÃ
Dir
chdir Çл»Â·¾¶(µ±Ç°ÊǽøÈëirbµÄ·¾¶)
pwd ¸ùĿ¼
delete ɾ³ýĿ¼,Ŀ¼²»ÊÇ¿ÕÅ×SystemCallErrorÒì³£
entriesÏî,Ìõ ·µ»Ø¸ø¶¨Ä¿Â¼ÖÐËùÓÐÎļþÃû×é³ÉµÄÊý×é,Èç¹ûĿ¼²»´æÔÚÅ×ÉÏÃæµÄÒì³£¡£ÆäÖаüº¬Îļþ¼ÐµÄ»°1:Îļþ¼Ðû¶«Î÷·µ»ØÃû×Ö£¬ÓÐÒ»¸öÎļþ·µ»Ø‘.’,Óжà¸öÎļþ·µ»Ø'..'
foreach ¶Ô¸ø¶¨Ä¿Â¼ÖеÄÿ¸öÏîµ÷ÓÃblock
getwd ·µ»Ø·ûºÅÁ´½ÓµÄÕæÕýµØÖ·
glob [] Æ¥ÅäÎļþ£¡³¬¸´ÔÓ£¬»ØÍ·×Ðϸ¿´¿´
mkdir ´´½¨Îļþ¼Ð¡£¿ÉÓÐȨÏÞ²Ù×÷£¬Òª»ØÍ·¿´¿´¡£Ö÷ÒªÊǶÔlinux²»ÊìϤ
new ΪÏÖÓеÄĿ¼newÒ»¸öDirʵÀý,¿ªÊ¼ÒÔΪûʲôÓ㬺óÀ´ÏëÏë²»¿ÉÄÜÒ»Ö±ÓÃdirÀ´Çл»Â·¾¶°É
open ²»´øblock²ÎÊýʱÓÚnewÒ»Ñù£¬´ø²ÎÊý¾Í´«µÝdirΪblock²ÎÊý¡£²Ù×÷Ϊ·Ç¸Ä¸Ä¼Ó¼Ó
rmdir ÒÆ³ýij·¾¶,ÓëdeleteͬÒå
close ¹Ø±ÕĿ¼Á÷,²»´ò¿ªµÄ»°ÈκηÃÎʶ¼Å×IOErrorÒì³£
each Ñ»·±éÀúÊý×é
path Êä³ö·¾¶,ʲô²ÎÊý¾Íʲô·¾¶
rewind ÖØ¶¨Î»µ½dirµÄµÚÒ»Ïî
seek ÖØ¶¨Î»µ½Ö¸¶¨Î»ÖÃ,ÓвÎÊý
tell ÖØ¶¨Ïòµ½µ±Ç°Î»ÖÃ
Ïà¹ØÎĵµ£º
ÎÒÃÇÔÚʹÓÃC±à³Ìʱ»áÓöµ½Ò»¸öÎÊÌ⣬±ÈÈçÍ·ÎļþµÄÒ»¸öº¯Êý°üº¬ÔÚÒ»¸ölibÖУ¬µ«ÊÇ
ÔÚʵ¼ÊÁ¬½ÓÖÐÎÒÃDz»ÖªµÀËüÔÚÄĸö¿âÖС£Ò²Ðí¿ÉÐеÄÒ»ÖÖ°ì·¨ÊÇÖ±½ÓÉÏÍø²éѯij¸ö
º¯ÊýµÄÒÀÀµÌõ¼þ£¬Õâ¶ÔÓÚ³£Óú¯ÊýÊÇûÎÊÌâµÄ£¡µ«ÊǶÔÓÚ¸´ÔÓ¶øÓÖȱÉÙÎĵµµÄµÚÈý·½
libÀ´Ëµ£¬ÎÞÒìÓÚ´óº£ÀÌÕë¡£
×Ô´Ëͨ¹ý2ÖÖ°ì·¨À´³¢ÊÔ½â¾öÕâ¸öÎÊÌ⣬ÎÒÃÇÏÈ¿´µÚÒ» ......
ÎÒÃÇÖªµÀrubyÖжÔÓÚÕûÊýµÄ[],[]=,<<,>>²Ù×÷ÊÇÕë¶ÔÓÚ¶þ½øÖƵÄÖµÀ´ÔËËãµÄ¡£
ÎÒÏÖÔÚдһ¸öÕë¶ÔÊ®½øÖÆÊý²Ù×÷µÄÀ࣬ӵÓÐÕûÊýµÄËùÓз½·¨£¬ÈçÏÂ:
class InterEx
def initialize(val=0)
@val=val
end
def to_s
@val.to_s
end
def [](idx)
self.to_s[idx].to_i
end
d ......
ruby³£¹æ·ÃÎÊaccessÊý¾Ý¿âµÄ·½·¨Ó¦¸ÃÊÇʹÓÃDBI¿â
£º
require 'dbi'
DBI.connect("DBI:ADO:Provider=Microsoft.Jet.OLEDB.4.0;Data Source=db.mdb;")
¿ÉÊÇ
¼òµ¥³¢ÊÔÖ®ºóûÄܳɹ¦£¬ÌáʾÕÒ²»µ½Çý¶¯Æ÷ADO,ÀÁµÃÔÙÊÔ£¬ËìÕÒÆäËû·½·¨¡£
Ò»·¬ËÑË÷Ö®ºó£¬·¢ÏÖ¿ÉÒÔÓÃWIN32OLEÀ´·ÃÎÊaccess,дһ¸ö¼òµ¥µÄÀà°ü×°Ö®:
......
¿ª·¢»·¾³
Ruby:Ruby1.9.1
Rails:Rails2.3.5
Mysql:Mysql5.0.9
Driver:mysql-2.8.1-x86-mingw32.gem
IDE:Rubymine2.0.1
Ò»¡¢´´½¨View/login
ÔÚView/loginÏ´´½¨login.html.erb¡¢index.html.erb¡¢loginFail.html.erb
login.html.erb´úÂëÈçÏ£º
<h1>Welcome to login!</h1>
<% form_tag do %>
& ......
http://www.robertsosinski.com/2008/12/21/understanding-ruby-blocks-procs-and-lambdas/
Understanding Ruby Blocks, Procs and Lambdas
Blocks, Procs and lambdas (referred to as closures
in Computer Science) are one of the most powerful aspects of Ruby, and
also one of the most misunderstood. This ......