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How to create a list of dummy files in Java?


How to create a list of dummy files in Java?

By : user2956995
Date : November 22 2020, 03:03 PM
will be helpful for those in need I would recommend not mocking File and instead make fake values. Methods that act on File instances tend to care about the file path and/or whether the file exists, so the most straight-forward way to do that is to use real instances.
Here is an example using JUnit4 that creates a list of three File instances to refer to files that don't exist in a directory that does:
code :
@RunWith(JUnit4.class)
public class ExampleTest {
  @Rule
  public TemporaryFolder testFolder = new TemporaryFolder();

  private final Foo foo = new Foo();

  @Test
  public void shouldFailIfFilesDoNotExist() {
    List<File> files = Lists.newArrayList(
        testFolder.newFile(),
        testFolder.newFile(),
        testFolder.newFile());
    foo.doIt(files);
  }
}


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Create a list using dummy variables in R

Create a list using dummy variables in R


By : Mr No Idea
Date : March 29 2020, 07:55 AM
To fix this issue I have three dummy variables that indicate the source of data , I'd do something like this:
code :
df = data.frame(DS1 = c(1,0,0), 
                DS2 = c(0,1,1), 
                DS3 = c(0,0,1))
df$source = apply(df == 1, 1, function(x) paste(names(df)[x], collapse = "|"))
> df
  DS1 DS2 DS3  source
1   1   0   0     DS1
2   0   1   0     DS2
3   0   1   1 DS2|DS3
How to quickly create dummy variables from list in R

How to quickly create dummy variables from list in R


By : Tushar
Date : March 29 2020, 07:55 AM
will be helpful for those in need We can use grepl with patterns as the Names' column in 'df2' (looped withsapply) to return a logical vector for the 'Group' column, coerce to binary withas.integerandcbind` with the first dataset ('df1').
code :
cbind(df1, sapply(df2$Names, function(x) as.integer(grepl(x, df1$Group))))
#               Group Score.Diff Anthony Kyle Zack
#Row 1   Kyle, Steve         15       0    1    0
#Row 2 Matthew, Tony         12       0    0    0
#Row n Anthony, Zack        -10       1    0    1
df1 <- structure(list(Group = c("Kyle, Steve", "Matthew, Tony",
 "Anthony, Zack"
), Score.Diff = c(15L, 12L, -10L)), .Names = c("Group", "Score.Diff"
), class = "data.frame", row.names = c("Row 1", "Row 2", "Row n"))

df2 <- structure(list(Names = c("Anthony", "Kyle", "Zack")), 
   .Names = "Names", class = "data.frame", row.names = c("Row 1", "Row 2",  "Row n"))
Create dummy variable from list

Create dummy variable from list


By : Sümeyra Ayengin
Date : March 29 2020, 07:55 AM
This might help you I have a pandas dataframe with a column named “Notes”. It has entries like the example below. I would like to create dummy variable columns based on a list: , Check with str.findall then get_dummies
code :
df.Note.str.findall('|'.join(Lst)).str[0].str.get_dummies()
Out[639]: 
   Borrower  debts  loan
0         0      0     1
1         1      0     0
2         0      1     0
yourdf=pd.concat([df,df.Note.str.findall('|'.join(Lst)).str[0].str.get_dummies()],axis=1)
yourdf
Out[640]: 
            Note  Borrower  debts  loan
0       loan lll         0      0     1
1  llll Borrower         1      0     0
2    ......debts         0      1     0
df=pd.DataFrame({'Note':['loan lll','llll Borrower','......debts']})
Create a dummy of a folder with a lot of files

Create a dummy of a folder with a lot of files


By : user3637911
Date : March 29 2020, 07:55 AM
hop of those help? Alright here is a non recursive solution with multithreading:
We rely on EnumerateFileSystemEntries to get recursivly everything in a given folder. We split every paths in two groups: folders and files. We create every folders in parallel in the dummy folder We create every files in parallel in the dummy folder
code :
public static async Task Main()
{
    var oldPath = "foo"; // folder to copy
    var newPath = "dummy"; // folder to create dummies

    var oldDirectory = Path.GetFullPath(oldPath);
    var oldDirectoryParent = Path.GetDirectoryName(oldDirectory);
    var newDirectory = Path.Combine(oldDirectoryParent, newPath);
    Directory.CreateDirectory(newDirectory);

    var paths = Directory.EnumerateFileSystemEntries(oldDirectory, "*.*", SearchOption.AllDirectories);
    var filesAndFolders = paths.ToLookup(Directory.Exists);

    var directoryTasks = filesAndFolders[true]
        .Select(path => newDirectory + path.Substring(oldDirectory.Length))
        .Select(CreateDirectoryAsync);
    await Task.WhenAll(directoryTasks);

    var fileTasks = filesAndFolders[false]
        .Select(path => newDirectory + path.Substring(oldDirectory.Length))
        .Select(CreateAsync);
    await Task.WhenAll(fileTasks);
}

public static Task<FileStream> CreateAsync(string path) => Task.Run(() => File.Create(path));
public static Task<DirectoryInfo> CreateDirectoryAsync(string path) => Task.Run(() => Directory.CreateDirectory(path));
bash create dummy files and folders based on real files

bash create dummy files and folders based on real files


By : Rogério Custódio
Date : March 29 2020, 07:55 AM
around this issue Rather than using `cmd`, $(cmd) is the new style and should be used if possible, it's clearer and can be nested too. However I wouldn't use either.
The issue your having is, I suspect, to do with you're mkdir, which requires that all the top level directories exist before creating the base ie
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