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Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null,null, null);
while (phones.moveToNext())
{
  String name=phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
  String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

}
phones.close();

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[http]
	proxy = http://127.0.0.1:8087
	sslVerify = false #注意一定要添加这一行用以解决“ SSL certificate problem: unable to get local issuer certificate”
[https]
	proxy = http://127.0.0.1:8087

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int32_t FloorLog2(uint32_t n)
{
    int32_t p = 0;

    if (n == 0) return -1;

    if (n & 0xffff0000) { p += 16; n >>= 16; }
    if (n & 0x0000ff00) { p +=  8; n >>=  8; }
    if (n & 0x000000f0) { p +=  4; n >>=  4; }
    if (n & 0x0000000c) { p +=  2; n >>=  2; }

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cout <<"edit distance for t1 & t2:";
    long long total_it_ed = 0;
    for( i = 0; i < it_ed.size(); i++)
    {
        cout << it_ed[i] << "," ;
        total_it_ed += it_ed[i];
    }
    cout << endl;
    
    cout <<"edit distance for c1 & c2:";

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压缩/解压缩

git http代理（校园网免流量）

校园网免国际流量代理

office

中文输入法问题

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def xrange(start,end,step):
'''
range [start,end)
'''
    r = start
    while r < end:
        yield r
        r += step
        

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#Python Tips

调用外部命令

detect function type

read large file

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if ls /path/to/your/files* &> /dev/null; then
    echo "files do exist"
else
    echo "files do not exist"
fi

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If they're both strings you can just do:

#define STR3 STR1 STR2

The preprocessor automatically concatenates adjacent strings.

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# first manual boot into ubuntu
root (hd0,X)
kernel /boot/vmlinuz... root=/dev/sdaX
initrd /boot/initrd...
boot