我正在寻找一种从多种文件名列表中返回最高版本化文件列表的方法。文件名格式中唯一的常量是它们都共享相同的版本格式。样本列表将是：
public class MainActivity extends AppCompatActivity {
private static Context mContext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = this.getApplicationContext();
//---Setting property for greeting message and styling it a bit---//
//---Initiallize properties for all of the buttons used in the Main Activity Page ---/
ImageButton aquaButton;
aquaButton = (ImageButton) findViewById(R.id.bAquarius);
ImageButton piscesButton;
piscesButton = (ImageButton) findViewById(R.id.bPisces);
ImageButton ariesButton;
ariesButton = (ImageButton) findViewById(R.id.bAries);
ImageButton taurusButton;
taurusButton = (ImageButton) findViewById(R.id.bTaurs);
ImageButton geminiButton;
geminiButton = (ImageButton) findViewById(R.id.bGemini);
ImageButton cancerButton;
cancerButton = (ImageButton) findViewById(R.id.bCancer);
ImageButton leoButton;
leoButton = (ImageButton) findViewById(R.id.bLeo);
ImageButton virgoButton;
virgoButton = (ImageButton) findViewById(R.id.bVirgo);
ImageButton libraButton;
libraButton = (ImageButton) findViewById(R.id.bLibra);
ImageButton scorpioButton;
scorpioButton = (ImageButton) findViewById(R.id.bScorpio);
ImageButton sagittariusButton;
sagittariusButton = (ImageButton) findViewById(R.id.bSagittarius);
ImageButton capriButton;
capriButton = (ImageButton) findViewById(R.id.bCapricorn);
//---Setting actions for each button when pressed---/
aquaButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent aquaActivity = new Intent(MainActivity.this,
aqua_Activity.class);
startActivity(aquaActivity);
}
});
piscesButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent piscesActivity = new Intent(MainActivity.this,
pisces_activity.class);
startActivity(piscesActivity);
}
});
ariesButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent ariesActivity = new Intent(MainActivity.this,
aries_activity.class);
startActivity(ariesActivity);
}
});
taurusButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent taurusActivity = new Intent(MainActivity.this,
taurus_activity.class);
startActivity(taurusActivity);
}
});
geminiButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent geminiActivity = new Intent(MainActivity.this,
gemini_activity.class);
startActivity(geminiActivity);
}
});
cancerButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent cancerActivity = new Intent(MainActivity.this,
cancer_activity.class);
startActivity(cancerActivity);
}
});
leoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent leoActivity = new Intent(MainActivity.this,
leo_activity.class);
startActivity(leoActivity);
}
});
virgoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent virgoActivity = new Intent(MainActivity.this,
virgo_activity.class);
startActivity(virgoActivity);
}
});
libraButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent libraActivity = new Intent(MainActivity.this,
libra_activity.class);
startActivity(libraActivity);
}
});
scorpioButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent scorpioActivity = new Intent(MainActivity.this,
scorpio_activity.class);
startActivity(scorpioActivity);
}
});
sagittariusButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent sagittActivity = new Intent(MainActivity.this,
sagittarius_activity.class);
startActivity(sagittActivity);
}
});
capriButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent capriActivity = new Intent(MainActivity.this,
capricorn_activity.class);
startActivity(capriActivity);
}
});
}
//--Initializing static methods for navigation--//
private static void goToCapriAct() {
Intent capriacti = new Intent(mContext, capricorn_activity.class);
mContext.startActivity(capriacti);
}
private static void goToAquaAct() {
Intent aquaacti = new Intent(mContext, aqua_Activity.class);
mContext.startActivity(aquaacti);
}
private static void goToPiscAct() {
Intent piscacti = new Intent(mContext, pisces_activity.class);
mContext.startActivity(piscacti);
}
private static void goToAriesAct() {
Intent ariesacti = new Intent(mContext, aries_activity.class);
mContext.startActivity(ariesacti);
}
private static void goToTaurAct() {
Intent taursacti = new Intent(mContext, taurus_activity.class);
mContext.startActivity(taursacti);
}
private static void goToGeminiAct() {
Intent geminiacti = new Intent(mContext, gemini_activity.class);
mContext.startActivity(geminiacti);
}
private static void goToCancAct() {
Intent cancacti = new Intent(mContext, cancer_activity.class);
mContext.startActivity(cancacti);
}
private static void goToLeoAct() {
Intent leoacti = new Intent(mContext, leo_activity.class);
mContext.startActivity(leoacti);
}
private static void goToVirgoAct() {
Intent virgoacti = new Intent(mContext, virgo_activity.class);
mContext.startActivity(virgoacti);
}
private static void goToLibraAct() {
Intent libraacti = new Intent(mContext, libra_activity.class);
mContext.startActivity(libraacti);
}
private static void goToScorpAct() {
Intent scorpacti = new Intent(mContext, scorpio_activity.class);
mContext.startActivity(scorpacti);
}
private static void goToSaggAct() {
Intent saggacti = new Intent(mContext, sagittarius_activity.class);
mContext.startActivity(saggacti);
}
//--Setting DatePickerFragment--//
public static class DatePickerFragment extends DialogFragment
implements DatePickerDialog.OnDateSetListener {
Calendar myCalendar = Calendar.getInstance();
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
int year = myCalendar.get(Calendar.YEAR);
int month = myCalendar.get(Calendar.MONTH);
int day = myCalendar.get(Calendar.DAY_OF_MONTH);
// Create a new instance o f DatePickerDialog and return it
int theme;
theme = android.R.style.Theme_Holo_Dialog;
return new DatePickerDialog(getActivity(), theme, this, year, month, day);
}
//--Checks about every single sign and navigation--//
String message;
public void onDateSet(DatePicker view, int year, int month, int day) {
// Do something with the date chosen by the user
month = month + 1;
if ((month == 12 && day >= 22 && day <= 31) || (month == 1 && day >= 1 && day <= 19)){
goToCapriAct();
}
else if ((month == 1 && day >= 20 && day <= 31) || (month == 2 && day >= 1 && day <= 17)){
goToAquaAct();
}
else if ((month == 2 && day >= 18 && day <= 29) || (month == 3 && day >= 1 && day <= 19)) {
goToPiscAct();
}
else if ((month == 3 && day >= 20 && day <= 31) || (month == 4 && day >= 1 && day <= 19)) {
goToAriesAct();
}
else if ((month == 4 && day >= 20 && day <= 30) || (month == 5 && day >= 1 && day <= 20)) {
goToTaurAct();
}
else if ((month == 5 && day >= 21 && day <= 31) || (month == 6 && day >= 1 && day <= 20)) {
goToGeminiAct();
}
else if ((month == 6 && day >= 21 && day <= 30) || (month == 7 && day >= 1 && day <= 22)) {
goToCancAct();
}
else if ((month == 7 && day >= 23 && day <= 31) || (month == 8 && day >= 1 && day <= 22)) {
goToLeoAct();
}
else if ((month == 8 && day >= 23 && day <= 31) || (month == 9 && day >= 1 && day <= 22)) {
goToVirgoAct();
}
else if ((month == 9 && day >= 23 && day <= 30) || (month == 10 && day >= 1 && day <= 22)) {
goToLibraAct();
}
else if ((month == 10 && day >= 23 && day <= 31) || (month == 11 && day >= 1 && day <= 21)) {
goToScorpAct();}
else if ((month == 11 && day >= 22 && day <= 30) || (month == 12 && day >= 1 && day <= 21)) {
goToSaggAct();}
else
{
System.out.println("Illegal date");}
}
}
public void showDatePickerDialog(View v) {
DialogFragment newFragment = new MainActivity.DatePickerFragment();
newFragment.show(getSupportFragmentManager(), "datePicker");
}}
我从此示例列表返回的内容如下：
mylist = ["File_01_v001", "File_01_v002", "File_01_v003", "File_01-test_v001", "File_01-test_v002", "File_01_v002", "File_02_v001", "File_02_v002", "File_02_v003"]
谢谢！
答案 0 :(得分：2)
我循环遍历这些项目，构建字典，找到最新的字典。并且只保留最新的，然后转换回alist。
mylist = ["File_01_v001", "File_01_v002", "File_01_v003", "File_01-test_v001", "File_01-test_v002", "File_01_v002", "File_02_v001", "File_02_v002", "File_02_v003"]
def findFiles(li):
di = {}
for item in li:
parts = item.split("_")
fileName = "_".join(parts[:-1])
version = parts[-1]
if (fileName not in di or di[fileName] < version):
di[fileName] = version
return [k + "_" + di[k] for k in di]
print(findFiles(mylist))
答案 1 :(得分：1)
我认为我太复杂了，但它确实有效：）
import re
mylist = ["File_01_v001", "File_01_v002", "File_01_v003", "File_01-test_v001", "File_01-test_v002", "File_01_v002", "File_02_v001", "File_02_v002", "File_02_v003"]
versions = {k: list(sorted([item.split('_')[2] for item in mylist if item.startswith(k)], key = lambda x: re.findall('\d+',x)[0]))[-1] for k in set(['_'.join(item.split('_')[:2]) for item in mylist])}
list_versions = ['_'.join(vers) for vers in versions.items()]