WangLu's Notes

Excel 导入csv文件时候可以指定分隔符，但是输出是没有明显的选项，只是txt用空格，csv用逗号。 查了一下，这个需要去控制面板，区域语言选项，“格式”标签选高级，在数字里面就可以调整分隔符了。 这个还真是不直观，太隐蔽了。。。 In Excel the separator can be specified when import a csv file using the wizard, but there's no such an option when exporting, the only choices are txt and csv, where the space and comma are used as separator respectively. And I found on the Internet that, to change the symbol, go to the control panel, then "regional and language options". In the advanced options under the "format" tab, there's a "number" tab, where you can change the "list separator". This option is hidden so well...

最近要把一个程序移植到Debian-kfreebsd上，并不如想象中的顺利。 主要是ptrace在两个平台上不太一样。 首先是宏定义，linux底下都叫PTRACE_*，freebsd上都是PT_*。这个也许不算什么 然后是ptrace函数的参数，主要是value这个，linux下面是long很好用，但是freebsd下是int，这样64位的时候就有些问题。 但是freebsd的ptrace有个更好用的操作PT_IO，可以自定义读写长度，而linux底下没有，要自己搞。 最后一个，花了我很长时间才解决的，是CONTINUE这个操作，linux下面addr这个参数是被忽略的，直接从中断的地方继续；但是freebsd下面则可以利用这个参数指定从哪里继续，如果希望从中断的地方继续，则指定为1即可。 目前只遇到这些，从这些方面来看，还是freebsd的接口更好用一些。 Recently I've been porting a software from Linux to Debian-kfreebsd, but it's not as easy as I had expected. The problem is the interface of ptrace is not exactly the same between linux and kfreebsd. The first is the names of the macros, which are PTRACE_* under linux and PT_* under freebsd. Secondly the function `ptrace' is not the same, the parameter `value' is `long' under Linux, but `int' under freebsd, so it seems that there'll be a problem on 64 bit freebsd. However, there's another operation called PT_IO under freebsd, using which we can specify the number of bytes we ...

原文: http://pebblesinthesand.wordpress.com/2008/05/22/a-srcipt-for-running-processes-in-parallel-in-bash/ 技巧是控制了最大并发数目，当前并发数过大时，等待有进程退出才开始下一个。 我现在正在写的脚本里正需要这个，借鉴过来 #!/bin/bash NUM=0 QUEUE="" MAX_NPROC=2 # default REPLACE_CMD=0 # no replacement by default USAGE="A simple wrapper for running processes in parallel. Usage: `basename $0` [-h] [-r] [-j nb_jobs] command arg_list -h Shows this help -r Replace asterix * in the command string with argument -j nb_jobs Set number of simultanious jobs [2] Examples: `basename $0` somecommand arg1 arg2 arg3 `basename $0` -j 3 \"somecommand -r -p\" arg1 arg2 arg3 `basename $0` -j 6 -r \"convert -scale 50% * small/small_*\" *.jpg" function queue { QUEUE="$QUEUE $1" NUM=$(($NUM+1)) } function regeneratequeue { OLDREQUEUE=$QUEUE QUEUE="" NUM=0 for PID in $OLDREQUEUE do if [ -d /proc/$PID ] ; then QUEUE="$QUEUE $PID" NUM=$(($NUM+1)) fi done } function che...

如题，非常高兴。 继续盘算下一个版本需要实现的东西。 链接: http://code.google.com/p/scanmem/ As titled I'm quite happy with this. Still considering possible features in next version. Link: http://code.google.com/p/scanmem/

症状是总报 Network Error， 重连也不行 根据 http://aslakjohansen.wordpress.com/2009/07/27/empathy-gives-network-error/ 把telepathy-butterfly杀掉就可以了。 So it always report "Network error", reconnecting has no luck. According to http://aslakjohansen.wordpress.com/2009/07/27/empathy-gives-network-error/ , just simply kill the "telepathy-butterfly" process, then it'll be fine.

不知道从什么时候开始我的Google Reader首页上总会显示一个kept unread列表，但是进去以后却是显示已读，此时点mark all as read或者挨个浏览这些item都没有任何效果。 今天在 http://groups.google.com/group/google-reader-howdoi/browse_thread/thread/a68ae3f9a7761e26/11eb862ab44a67c3 找到了解法： 给每个kept unread的条目加星 去加星条目列表，挨个浏览每个条目（不要点mark all as read) 去掉这些条目的星 然后就正常了。 这个应该是Google Reader的bug吧。。。 There's been a "kept unread" list in my Google Reader home page for some time, and I didn't know why. In the list, each item seems be already ready, and clicking "mark all as read" or navigating each of them have no effect. Today I found the solution on http://groups.google.com/group/google-reader-howdoi/browse_thread/thread/a68ae3f9a7761e26/11eb862ab44a67c3 Add start for each of them In "starred items", navigate each of them (don't click "mark all as read") Remove these temporary stars Then that list would be gone. This must be a bug of Google Reader...

最近需要搞个桌面上的todo list， 以前是用screenlets，现在不用了，而且为一个插件就开这个庞然大物太浪费了。 我在用gnote，但是这个不适合放在桌面上。gnome-panel的一个小插件也是sticky note，但是不能锁定在桌面上，一点就消失了。 另外搜到的xpad，但是我这里有bug，一个灰色的窗口，什么都么有。网上搜到了解决的patch，但是不想折腾了。 最后看到某人论坛留言： 在桌面建一个文本文件，然后把图标放大。。。顿时豁然开朗，一开始遇到这个特性时还觉得有些烦人，但是现在需要时反而想不起来了。。。 效果不错，缺点是不能弄太多文字。 Recently I found that I need a sticky note on my desktop. I used screenlets before, but not anymore now. It's a waste to enable it only for such a gadget. Now I'm using gnote, which is rather a nice software, but it's not suitable for 'sticky' notes. There's also a stickynote applet for gnome-panel, but I don't know how to attach the notes to desktop -- every time I click somewhere, the notes disappear. I googled some software called 'xpad', but on my computer it's nothing but a gray empty window -- an annoying bug, although I've googled a patch for this, I've got no feeling for it. Finally I got someone's comment on some bbs -- "create a paint text ...