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 ÒƳýij·¾¶,ÓëdeleteͬÒå
close ¹Ø±ÕĿ¼Á÷,²»´ò¿ªµÄ»°ÈκηÃÎʶ¼Å×IOErrorÒì³£
each Ñ»·±éÀúÊý×é
path Êä³ö·¾¶,ʲô²ÎÊý¾Íʲô·¾¶
rewind Öض¨Î»µ½dirµÄµÚÒ»Ïî
seek Öض¨Î»µ½Ö¸¶¨Î»ÖÃ,ÓвÎÊý
tell Öض¨Ïòµ½µ±Ç°Î»ÖÃ
Ïà¹ØÎĵµ£º
¿ª·¢»·¾³
OS£ºWindowsXP
Ruby: Ruby1.9.1
Rails: Rails2.3.5
IDE: RubyMine2.0.1
1¡¢´´½¨Rails¹¤³Ì
2¡¢ÐÞ¸Ä /config/database.yml
×Ô¶¯´´½¨µÄ¹¤³ÌÖÐĬÈÏÊý¾Ý¿âÁ¬½ÓµÄÊÇsqlite£¬Èç¹ûûÓа²×°´ËÊý¾Ý¿â£¬ÐèÒªÐ޸ĸÃÅäÖ㨱¾ÀýÖÐʹÓõÄÊÇmysql£©
# Mysql Version 5.1.46
development:
adapter: mysql
database: ......
ʹÓà will_paginate ½øÐзÖÒ³ºÍ¼òµ¥²éѯ
ÔÚÃüÁîÐÐÏÂʹÓà gem install will_paginate ÃüÁ³öÏÖÏÂÃæ½á¹û°²×°³É¹¦
´ò¿ª books_controller.rb (Äã×Ô¼ºµÄ¿ØÖÆÆ÷)
×¢Ê͵ô²éÕÒÈ«²¿µÄ·½·¨£¬Ê¹ÓÃÏÂÃæµÄ·½·¨£¬ÒѾ¼¯³É¸ù¾Ýtitle½øÐвéѯ
Ruby´úÂë
#@books = Book.all
@books = Book.pagina ......
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®:
......
ÏÈ·ÅÉÏÒ»¸öʵÀýµÄbatÎļþ,ÒªÇó¹ÜÀíÔ±ÌØȨÔËÐÐ:
@echo off
::CMDÀïÏÔʾ²ÊÉ«ÎÄ×Ö
chcp 437>nul&&graftabl 936>nul
if not exist CONFIG.NT copy %WinDir%\System32\CONFIG.NT CONFIG.NT
@cls
echo DEVICE=%WinDir%\System32\ANSI.SYS /x >%WinDir%\System32\CONFIG.NT
@echo.
command /cecho
com ......