linux GUI表示について

GNOME Display Managerが表示できなくなった場合は
service gdm stop
service gdm start
で解消できるかも

about git

http://marklodato.github.com/visual-git-guide/

テキストファイル内のタブをスペースに置き換えるには

1. linuxコマンドで実行する場合
expand --tab=4 before.txt > after.txt

2. vimで実施する場合
:set expandtab
:set ts=4
:retab


逆の動作をする場合
linux:
unexpand before.txt > after.txt

マルチバイト文字を一括検索

:vim /[^[:print:][:tab:]]\+/ **/*.*

How to: Meld for Git diffs in Ubuntu Hardy

Are you using Git in Ubuntu and want to use an external visual diff viewer? It's easy! I will be using Meld for this example but most visual diff tools should be similar. If you don't already have Meld, then install it:

sudo apt-get install meld

Ok. Now let's begin by breaking it. Enter this into a terminal:

git config --global diff.external meld

Then navigate to a Git tracked directory and enter this (with an actual filename):

git diff filename

Meld will open but it will complain about bad parameters. The problem is that Git sends its external diff viewer seven parameters when Meld only needs two of them; two filenames of files to compare. One way to fix it is to write a script to format the parameters before sending them to Meld. Let's do that.

Create a new python script in your home directory (or wherever, it doesn't matter) and call it diff.py. and "chmod 777 /home/nathan/diff.py"

#!/usr/bin/python

import sys
import os

os.system('meld "%s" "%s"' % (sys.argv[2], sys.argv[5]))

Now we can set Git to perform it's diff on our new script (replacing the path with yours):

git config --global diff.external /home/nathan/diff.py
git diff filename

This time when we do a diff it will launch Meld with the right parameters and we will see our visual diff.

class final 領域の初期化

public class Eval {

private static final HashMap sSceneResources
= new HashMap();


public String getString(Integer toget) {
String ret = (String)sSceneResources.get(toget);
return ret;
}

static {
sSceneResources.put(2,new String("2"));
sSceneResources.put(3,new String("3"));
}
}

gdb でソースを解析する

gdb でソースを解析する

1. coredumpを有効化
ulimit -c unlimited

2. レジスタの表示
(gdb) info reg

3. 特定のレジスタを表示する
(gdb) p $eax

4. x 特定のメモリの中身を表示する
(gdb) x $pc //通常表示
(gdb) x/i $pc //機械命令として
(gdb) x/10i $pc //pcから10個の機械命令として

5. x86プロセッサの場合、PCはeipレジスタで、FPはebpレジスタです。

6. (gdb) frame でframe情報を表示し、
(gdb) frame number でframe を切り替える。