[Solved] How to delete all Table records in Sqlite?

You should first initialize you SQLiteDatabase, so convert this: SQLiteDatabase database; database.delete(ActivityTableDBOpenHelper.ACTIVITY_TABLE,null,null); to this: SQLiteDatabase database = new SQLiteDatabase(this); // or dbHelper.getWritableDatabase(); if you have a dbHelper database.delete(ActivityTableDBOpenHelper.ACTIVITY_TABLE,null,null); Else the database object is null and you get the error. Here you could find a whole example for all operations http://www.vogella.com/tutorials/AndroidSQLite/article.html 2 solved How to delete … Read more

[Solved] I need to find the file path and file name of a file that matches the string lastline [closed]

try { string lastline = “Controller”; // assuming you know the file your searching for foreach (string filePaths in Directory.GetDirectories(@”E:\Program Files (x86)\foobar2000\library\”)) { foreach (string f in Directory.GetFiles(filePaths, “*” + lastline + “*.*”)) { Console.WriteLine(f); // would print the filepath n the file name } } } catch (Exception ex) { Console.WriteLine(ex.Message); } Hope this … Read more

[Solved] return all rows of a table including duplicate rows

to get all rows, just use select * from tableName If you want to filter the duplicates out just add select distinct * from tableName if you want to group by, you can do: select column1, column2 sum(column1, column2) as sumCol from table group by column1,column2 or using a window function select * sum(column1, column2) … Read more

[Solved] Solving with only loop

public static int smallest(int n) { int i = 1; for (; ; ) { int contain = 0; int temp = 0; int myNum = 0; for (int j = 1; j <= n; j++) { myNum = i * j; temp = myNum; while (true) { if (temp % 10 == 2) { … Read more

[Solved] Using scanf funciton in printf to get values

scanf() returns number of receiving arguments successfully assigned or EOF in case of failure. Read more about scanf() here. In context of your program, when you give input 5 the scanf() successfully assign it to receiving argument i and since the receiving argument is 1, scanf() is returning 1 which is getting printed. Hence you … Read more

[Solved] Summarize data.frame by dates in R

I would use data.table and do something like the following: library(data.table) setDT(df) ndf <- df[, .(Date = paste(Date[1], “to”, Date[.N]), weather = Type.of.Weather[1]), rleid(Type.of.Weather) ][, rleid := NULL ][] ndf Date weather 1: 01-Jan to 03-Jan Cloudy 2: 04-Jan to 10-Jan Rainy 3: 11-Jan to 15-Jan Cloudy 4: 16-Jan to 20-Jan Sunny 1 solved Summarize … Read more

[Solved] PHP multidimensional array keys combinations/combinatorics [closed]

I made some slight modifications to the original code in order to make it use the amount of keys instead of the array values, and then I added a second function to allow a multi-dimensional array to be counted as well. <?php function everyCombination($array) { $newArray = array(); for($keyCount = 1; $keyCount <= count($array); $keyCount++){ … Read more

[Solved] Search in text file and save in Excel

It’s quite easy using pandas and a dict: with open(‘file.txt’, ‘r’) as f: lines = f.readlines() students = [] student = {} for line in lines: if ‘:’ in line: student[‘id’] = line.split(‘:’)[0] elif ‘name’ in line: student[‘Name’] = line.split(‘=’)[1].replace(‘\n’,”) elif ‘Age’ in line: student[‘Age’] = line.split(‘=’)[1].replace(‘\n’,”) elif ‘Grade’ in line: student[‘Grade’] = line.split(‘=’)[1].replace(‘\n’,”) students.append(student) … Read more

[Solved] Why is my Parcelable Creator not working?

return new Set(parcel.ReadStringArray(), parcel.ReadBooleanArray()… At parcel.ReadBooleanArray() You have no boolean arrays in the constructor public Set ( string[] Jugador, int[] Games, int[] NoForzados, int[] Aces, int[] Winners, int[] DobleFaltas, int[] Primeros, int[] PrimerosGanados, int[] Segundos, int[] SegundosGanados) Did you forget to set jugado? 1 solved Why is my Parcelable Creator not working?

[Solved] I have a date in int format DDMMYYYY, how can I separate day and month and year [closed]

As pointed out in comments, it’s most likely that input might be coming as string. You can easily parse Date from string like this: private static Date getDate(String dateStr) throws ParseException { SimpleDateFormat simpleDateFormat = new SimpleDateFormat(“ddMMyyyy”); return simpleDateFormat.parse(dateStr); } Then you can do something like this to check which date is older: String date1 … Read more

[Solved] Rolling up addition using MySQL

SELECT x.* , x.cf1+x.cf2 sub_total , SUM(y.cf1+y.cf2) running FROM 1_bugs x JOIN 1_bugs y ON y.id <= x.id GROUP BY x.id; +—-+————+—–+—–+———–+———+ | id | date | cf1 | cf2 | sub_total | running | +—-+————+—–+—–+———–+———+ | 1 | 2016-07-19 | 3 | 2 | 5 | 5 | | 2 | 2016-07-19 | 2 … Read more