JUST DO IT ~

          我只想當個程序員

           

           

          API對設計流程的影響——Joshua Bloch訪談

          http://blog.sina.com.cn/s/blog_6310e0b20100o7cv.html 

           

          工程師Joshua Bloch談如何設計一款優秀的API【附PPT】

          http://www.csdn.net/article/2014-02-18/2818441-How-to-design-a-good-API

           
          《Effective Java》: Joshua Bloch訪談

          http://eastsun.iteye.com/blog/195861

          posted @ 2014-12-19 13:23 小高 閱讀(221) | 評論 (0)編輯 收藏

           

          The Java? Tutorials

          http://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html

           

          1.5

          New Features and Enhancements J2SE 5.0

          http://docs.oracle.com/javase/1.5.0/docs/relnotes/features.html

          Experiences with the New Java 5 Language Features

          Pages: 1, 2, 3, 4

           

          1.6

          Highlights of Technology Changes in Java SE 6

          http://www.oracle.com/technetwork/java/javase/features-141434.html

           

          1.7

          Highlights of Technology Changes in Java SE 7

          http://www.oracle.com/technetwork/java/javase/jdk7-relnotes-418459.html

           

          http://www.javacodegeeks.com/2014/05/java-8-features-tutorial.html

          posted @ 2014-12-17 17:19 小高 閱讀(252) | 評論 (0)編輯 收藏

          學習步驟
          1.c 
          2.c object 
          3. stl
          4. linux os api
          5. socket  
          6. 分布式
          7. web html5 
          8. mac UI  
          9. obj c
          10.算法。


          一些想法:
          微博上關注的人很多淘寶系的很多都不搞技術了,原因是阿里上市了,足夠的錢退休了,還有些人離職去創業了,
          可能氛圍比較好,看來創業的都有滋有味。大規模的系統搞過了,心里有底氣了,知道方向,估計成功率也會比較高。
          一些人技術人靠知乎刷存在感,靠名氣說話 。
          一些2流技術角色投稿文章csdn,寫專題blog。很多毫無營養。
          國內的技術書,還是一如既往類似官方教程的翻譯版。

           

          blog

          http://preshing.com/ 

           

          Jeff Atwood 大stackoverflo

          http://blog.codinghorror.com/

          https://github.com/coding-horror

           

          陳皓

          http://coolshell.cn/ 

           

          云風

          http://blog.codingnow.com/ 

           

          何_登成

          http://weibo.com/2216172320/BcUmvbyvW?type=repost#_rnd1418722416088

           

          http://ifeve.com/

           

          http://www.importnew.com/14105.html

           

          網絡教學:

          http://www.codecademy.com/

           

          PLSQL

          http://plsql-tutorial.com/plsql-functions.htm

          posted @ 2014-12-17 10:55 小高 閱讀(287) | 評論 (0)編輯 收藏

           

          先確保執行這個. win7 以上才支持 WER windows error report 功能 .

          windows 彈出提示框, 然后進程管理器,右鍵手工導出也行.

          Windows Registry Editor Version 5.00

          [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Error Reporting\LocalDumps]
          "DumpFolder"="c:\\"
          "DumpCount"=dword:00000030
          "DumpType"=dword:00000002
          "CustomDumpFlags"=dword:00000000

          c++ debug版本 + pdb文件

          另外需要注意不是所有情況都生成core.

          windows 改了注冊表不生成core的原因:

          Requirements and limitations

          · Debugging dump files of optimized code can be confusing. For example, compiler inlining of functions can result in unexpected call stacks and other optimizations might change the lifetime of variables.

          · Dump files from 64-bit machines must be debugged on an instance of Visual Studio that is running on a 64-bit computer.

          · In versions of Visual Studio before VS 2013, dumps of 32-bit apps that were run on 64-bit machines that were collected by some tools (such as Task Manager and 64-bit WinDbg) could not be opened in Visual Studio. This limitation has been removed in VS 2013.

          · Visual Studio can debug dump files of native apps from ARM devices. Visual Studio can also debug apps dump files of managed apps from ARM devices, but only in the native debugger.

          · To debug kernel-mode dump files in Visual Studio 2013, download the Windows 8.1 Version of Debugging Tools for Windows. See Kernel Debugging in Visual Studio.

          · Visual Studio can't debug dump files saved in the older dump format known as a full user-mode dump. Note that a full user-mode dump is not the same a dump with heap.

          · To debug with the SOS.dll (SOS Debugging Extension) in Visual Studio, you must install the Debugging Tools for Windows that is part of the Windows Driver Kit (WDK). See Windows 8.1 Preview: Download kits, bits, and tools.

           

          參考:

          Collecting User-Mode Dumps   --注冊表

          http://msdn.microsoft.com/en-us/library/windows/desktop/bb787181(v=vs.85).aspx

           

          Crash Dump Analysis  --- c++ 自己生成dump

          http://msdn.microsoft.com/en-us/library/windows/desktop/ee416349(v=vs.85).aspx 

           

          Use Dump Files to Debug App Crashes and Hangs in Visual Studio

          http://msdn.microsoft.com/en-us/library/d5zhxt22.aspx#bkmk_requirements_and_limitations

           

          Attach to Running Processes with the Visual Studio Debugger

          http://msdn.microsoft.com/en-us/library/3s68z0b3.aspx

          Just-In-Time Debugging in Visual Studio  ------- 還沒看

          http://msdn.microsoft.com/en-us/library/5hs4b7a6.aspx

          posted @ 2014-12-17 10:44 小高 閱讀(676) | 評論 (0)編輯 收藏

          The Discipline and Method Architecture for Reusable Libraries (2000)



          Citations

          1489The C++ Programming Language - Stroustrup - 1991
          1437Object-Oriented Software Construction - Meyer - 1997
          861Design Patterns - Gamma, Helm, et al. - 1995
          303Purify: Fast detection of memory leaks and access errors - Hastings, Joyce - 1991
          232Rational design process: how and why to fake it - Parnas, Clements - 1986
          118The Art of Computer Programming, Volume 1 - Knuth - 1998
          89Scalable software libraries - Batory, Singhal, et al. - 1993
          67The Library Scaling Problem and the Limits of Concrete Component Reuse - Biggerstaff - 1994
          57Algorithm-oriented generic libraries - Musser, Stepanov - 1994
          47Vmalloc: A general and efficient memory allocator - Vo - 1996
          37Algorithms, 2nd edition - Sedgewick - 1988
          30An Empirical Study of Delta Algorithms - Hunt, Vo, et al. - 1996
          27Empirical measurements of six allocation-intensive C programs - Zorn, Grunwald - 1992
          19Porting Unix to Windows NT - Korn
          19Xept: A software instrumentation method for exception handling - Vo, Wang, et al. - 1997


          18Worst case fragmentation of first fit and best fit storage allocation strategies - Robson - 1977
          17libg++, the GNU C++ library - Lea - 1988
          13On the external storage fragmentation produced by first-fit and best-fit allocation strategies - Shore - 1975
          11C Interfaces and Implementation - Hanson - 1997
          10National Standard for Information Systems { Programming Language C. Technical Report X3J11/89{159, ANSI Accredited Standards Committee, X3 Information Processing Systems - American - 1989
          9Ksh - an extensible high level language - Korn - 1994
          7Associative arrays - Koenig - 1988
          5CDT: A Container Data Type Library - Vo - 1997
          5Making a vector Fit for a Standard - Stroustrup - 1994
          4Vdelta: Differencing and Compression - Korn, Vo - 1995
          4Kiem-Phong Vo. Principles for Writing Reusable Library - Fowler, Korn - 1995
          3Practical Reusable Unix Software - Krisnamurthy - 1995
          2Negotiated Interfaces for Software Reuse - Clements, Parnas, et al. - 1992
          1Concrete software libraries - Vo - 1998
          1Sfio: A Buffered I/O Library. Software---Practice and Experience - Fowler, Korn, et al. - 199




          posted @ 2014-08-26 13:36 小高 閱讀(424) | 評論 (1)編輯 收藏


          #include <sys/stat.h>
          long file_length(char *f)
          {
              struct stat st;
              stat(f, &st);
              return st.st_size;
          }


          If you have the file stream (FILE * f):
          fseek(f, 0, SEEK_END); // seek to end of file
          size = ftell(f); // get current file pointer
          fseek(f, 0, SEEK_SET); // seek back to beginning of file
          // proceed with allocating memory and reading the file
          Or,
          #include <sys/types.h>
          #include <sys/stat.h>
          #include <unistd.h>
          fd = fileno(f); 
          struct stat buf;
          fstat(fd, &buf);
          int size = buf.st_size;
          Or, use stat, if you know the filename:
          #include <sys/stat.h>
          struct stat st;
          stat(filename, &st);
          size = st.st_size;
          posted @ 2014-08-08 16:00 小高| 編輯 收藏

           

           

          relocation error: multiget: symbol _Z23wxHandleFatalExceptionsb, version WXU_2.8 not defined in file libwx_baseu-2.8.so.0

           

          下載地址:

          http://www.codeblocks.org/downloads/26 

          http://sourceforge.net/projects/codeblocks/files/Binaries/13.12-RC1/Linux%20(64bit)/

          codeblocks-13.12-1.el5.x86_64.tar.bz2

           

          安裝的關鍵

          Note: On RedHat/CentOS 5 and older revisions of 6 (up to 6.2 as far as I know) you need to add repoforge (former rpmforge) to your repolist, to be able to install the needed wxGTK-package. Seehttp://repoforge.org/use for an instruction.

           

          更新yum的源 很重要

          http://repoforge.org/use/  下載對應的rpm

          cat /etc/redhat-release

          uname –a

           

          wget http://apt.sw.be/redhat/el6/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm

          rpm -ivh package-filename

           

          # yum install gcc
          # yum install gcc-c++
          如果之前失敗過  yum erase wxGTK
          # yum install wxGTK
           
          然后
           ]# ls
          codeblocks-12.11-1.el6.i686.rpm
          codeblocks-contrib-12.11-1.el6.i686.rpm
          codeblocks-contrib-devel-12.11-1.el6.i686.rpm
          codeblocks-devel-12.11-1.el6.i686.rpm
          # rpm -ivh codeblocks*
           

          1. 下載repo文件
              下載地址:http://mirrors.163.com/.help/CentOS6-Base-163.repo

          2. 備份并替換系統的repo文件
          [root@localhost ~]# cd /etc/yum.repos.d/
          [root@localhost ~]# mv CentOS-Base.repo CentOS-Base.repo.bak
          [root@localhost ~]# mv /root/CentOS6-Base-163.repo CentOS-Base.repo

          3. 執行yum源更新
          [root@localhost ~]# yum clean all
          [root@localhost ~]# yum makecache
          [root@localhost ~]# yum update

           

          yum install gcc gcc-g++ autoconfig automake 
           
           
          參考:
          http://blog.csdn.net/dupei/article/details/6428346
           
          http://www.cnblogs.com/magialmoon/archive/2013/05/05/3061108.html
           
           
           
           
          posted @ 2014-07-19 12:17 小高 閱讀(252) | 評論 (0)編輯 收藏

          sqlplus 外面執行正常.

          tomcat調用老有問題.多調用幾次久正常.

           

          可能是包中的全局變量引起的.

           

           

          If so, that's because your package is stateful:

          The values of the variables, constants, and cursors that a package declares (in either its specification or body) comprise its package state. If a PL/SQL package declares at least one variable, constant, or cursor, then the package is stateful; otherwise, it is stateless.

          When you recompile the state is lost:

          If the body of an instantiated, stateful package is recompiled (either explicitly, with the "ALTER PACKAGE Statement", or implicitly), the next invocation of a subprogram in the package causes Oracle Database to discard the existing package state and raise the exception ORA-04068.

          After PL/SQL raises the exception, a reference to the package causes Oracle Database to re-instantiate the package, which re-initializes it...

          You can't avoid this if your package has state. I think it's fairly rare to really need a package to be stateful though, so you should revisit anything you have declared in the package, but outside a function or procedure, to see if it's really needed at that level. Since you're on 10g though, that includes constants, not just variables and cursors.

          But the last paragraph from the quoted documentation means that the next time you reference the package in the same session, you won't get the error and it will work as normal (until you recompile again).

           

          existing state of packages has been discarded means, that your Package had some sort of state.

          This is caused by a global variable (or constant) stored in your Package Body.

          Since the package has already been used in your session, Oracle assumes that this state is relevant for you. Some of these variables might have different values now, and when you recompile the Body, the values are reset.

          This exception is thrown, so that your clients know that they can't rely on those variables any more.

          You could try to remove all global variables and constants from the Package Body, or close your session and reconnect before calling the package again.

           

           

          參考:

          http://stackoverflow.com/questions/2502722/pl-sql-package-invalidated

           

          http://stackoverflow.com/questions/19376440/ora-06508-pl-sql-could-not-find-program-unit-being-called

          posted @ 2014-07-16 21:14 小高 閱讀(1664) | 評論 (0)編輯 收藏

          監聽器配置少了.

          lsnrctl

           

          SID_LIST_LISTENER =
            (SID_LIST =
              (SID_DESC =
                (GLOBAL_DBNAME = XE )
                (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
                (SID_NAME =XE )
              )
              (SID_DESC =
                (SID_NAME = PLSExtProc)
                (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
                (PROGRAM = extproc)
              )
              (SID_DESC =
                (SID_NAME = CLRExtProc)
                (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
                (PROGRAM = extproc)
              )
            )

          LISTENER =
            (DESCRIPTION_LIST =
              (DESCRIPTION =
                (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
                (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
              )
            )

          DEFAULT_SERVICE_LISTENER = (XE)

          posted @ 2014-07-11 10:07 小高 閱讀(312) | 評論 (0)編輯 收藏

           

          1.安裝 vnc-server

          找包

          http://www.rpmfind.net/linux/rpm2html/search.php?query=libtermcap&submit=Search+...&system=centos&arch=

          如果window

           

          vncserver :1

          輸入密碼

          vnc登錄后

          xhost +

          解決display問題.

          vncserver -kill :1

           

          vnc 如果進入以后3個 提示選擇 allow clipboard  .

          修改/root/.vnc/xstartup文件,把最后一行 twm& 修改成"startkde &" 或者"gnome-session &"

          不然的話連接linux時只出現了一個終端編輯器窗口。

           

          exec gnome-session &

           

           

           

           

           

          oracle 安裝

          http://blog.itpub.net/7719012/viewspace-1139996

          http://lowendtalk.com/discussion/5396/how-to-install-vnc-on-centos

           

           

          二:使用Xmanager實現xhost掛接圖形

          http://hi.baidu.com/hanyanlovejoy/item/564ed582accef0efe496e017

          posted @ 2014-07-10 12:53 小高 閱讀(173) | 評論 (0)編輯 收藏

          刪除

          :g/.*ABC/m

          :g/kernel32/d

          :[range]g[lobal]/{pattern}/[cmd] :help :g

          vim 查找一個文章段落, 開頭字符 結尾字符

          /.*#tag1\(.\+\n\+\)\{-}#tag2.*

           

          刪除掉 :

          g/.*#tag1\(.\+\n\)\{-}#tag2.*/d

          這句話\(.\+\n\+\) 采用分組

          .\+  .任意字符 + 一個或多個

          \n\+  回車  一個或多個

          \+1 或更多

          \{-} 0 或更多盡可能少. 任意字符

          \n 換行符

          為什么  /This\_.*text/ 不可以,因為\_. 是全緩沖區匹配模式的.

           

          概念分組、捕獲

          http://i.linuxtoy.org/docs/guide/ch26s08.html#id3120909

          abc123.456.def

          \d{3}表示三個數字,(\d{3}\.)表示三個數字加“.”為一組,{2}表示這一組內容重復兩次

           

           

           

          參考:

          http://vimcdoc.sourceforge.net/doc/pattern.html#search-pattern

          ^\(.\+\n\)\{-}#.*tag1

          http://stackoverflow.com/questions/10076834/multi-line-regex-in-vim-filtering-out-blocks-of-text-in-a-file

          Vim 中刪除符合條件的行

          http://timothyqiu.com/archives/delete-lines-matching-pattern-in-vim/ https://github.com/railsinstaller/railsinstaller-windows/releases

          posted @ 2014-06-25 14:24 小高 閱讀(205) | 評論 (0)編輯 收藏

           

          源碼

          https://github.com/embedthis/goahead/blob/master/src/utils/gopass.c

          goAhead 2.5嵌入式web服務器移植到arm9 2440 + linux中

          http://blog.csdn.net/reille/article/details/6784809

          goAhead上實現文件上傳到嵌入式web服務器上

          http://www.xuebuyuan.com/625754.html

           

          3. 資料

          3.1 http://blog.csdn.net/reille/article/details/6871827 本博客轉載的文章

          3.2
          http://www.hackchina.com/r/57970/v2.1.1-_-web-_-upload.htm__html
             前端實現參考

          3.3

          http://www.hackchina.com/r/57970/v2.1.1-_-LINUX-_-upldForm.c__html 服務器端實現參考

          posted @ 2014-06-20 11:01 小高 閱讀(246) | 評論 (0)編輯 收藏

           

          RiskUnit0001.o: relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
          obj/Debug/src/RiskUnit0001/RiskUnit0001.o: could not read symbols: Bad value

           

          為什么需要

           

          解決辦法編譯器已經提示了:recompile with -fPIC
          但是我們應該重新編譯誰帶上這個參數呢?經過我幾番折騰,發現如下情況:
          1、編譯.o文件的時候,沒有加參數-fPIC,這問題個在gcc version 3.4.6版本沒有發生,可能那個編譯器默認都給加上吧。
          2、當前程序中有用到某個靜態庫,那個靜態庫編譯.o文件的時候沒有加上-fPIC(靜態庫其實就是.o文件打包)。補充一點:我發現手寫Makefile時即使不加-fPIC也沒有這個問題,這一點很郁悶,這個只在用automake工具編譯出.a文件時才出現過。
          知道原因了,解決辦法自然有了,保證你編譯.o文件的時候,都加上-fPIC,這樣你才能編譯出動態庫來。

           

          引用

          http://hi.baidu.com/duizhe_memory/item/c4ccbb0831a5998d3d42e212

          posted @ 2014-04-18 11:15 小高 閱讀(341) | 評論 (0)編輯 收藏

           

           

          sqlplus "core/core@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=192.168.75.1)(Port=1521))(CONNECT_DATA=(SID=itmp)))"


          sqlplus core/core@192.168.75.1:1521/itmp

           

          參考一個 :

           

           

          /***
          *    ORACLE客戶端liunx安裝部署說明
          *
          */

          配置步驟:

          1,將本文件夾拷貝到相應的服務器上。
          2,配置環境變量如下: 文件夾所在路徑(/kfts/tools/oracle)
          (永久修改方式)
          vi /etc/profile
          在文件最后添加:
          export LD_LIBRARY_PATH=/kfts/tools/oracle:$LD_LIBRARY_PATH
          export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK
          export ORACLE_HOME=/kfts/tools/oracle/
          export PATH=/kfts/tools/oracle/:$PATH
          export TNS_ADMIN=/kfts/tools/oracle/network/admin

          之后運行命令生效:
          source /etc/profile

          posted @ 2014-04-12 11:19 小高 閱讀(1860) | 評論 (0)編輯 收藏

           

           

          relocation error: multiget: symbol _Z23wxHandleFatalExceptionsb, version WXU_2.8 not defined in file libwx_baseu-2.8.so.0

           

          下載地址:

          http://www.codeblocks.org/downloads/26 

          http://sourceforge.net/projects/codeblocks/files/Binaries/13.12-RC1/Linux%20(64bit)/

          codeblocks-13.12-1.el5.x86_64.tar.bz2

           

          安裝的關鍵

          Note: On RedHat/CentOS 5 and older revisions of 6 (up to 6.2 as far as I know) you need to add repoforge (former rpmforge) to your repolist, to be able to install the needed wxGTK-package. Seehttp://repoforge.org/use for an instruction.

           

          更新yum的源 很重要

          http://repoforge.org/use/  下載對應的rpm

          cat /etc/redhat-release

          uname –a

          rpm -ivh package-filename

           

          # yum install gcc
          # yum install gcc-c++
          如果之前失敗過  yum erase wxGTK
          # yum install wxGTK
           
          然后
           ]# ls
          codeblocks-12.11-1.el6.i686.rpm
          codeblocks-contrib-12.11-1.el6.i686.rpm
          codeblocks-contrib-devel-12.11-1.el6.i686.rpm
          codeblocks-devel-12.11-1.el6.i686.rpm
          # rpm -ivh codeblocks*
           
          yum install gcc gcc-g++ autoconfig automake 
           
           
          參考:
          http://blog.csdn.net/dupei/article/details/6428346
           
          http://www.cnblogs.com/magialmoon/archive/2013/05/05/3061108.html
           
           
           
           
          posted @ 2014-04-11 16:19 小高 閱讀(1473) | 評論 (1)編輯 收藏
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