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File Reader IO Reading Text Files


File Reader IO Reading Text Files

By : Ian
Date : November 22 2020, 11:05 AM
Hope this helps EDIT
It seems your text file contains not only the expected four lines but other code.
code :


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getting null when reading a text file in java using buffered reader

getting null when reading a text file in java using buffered reader


By : Swayam Siddhu
Date : March 29 2020, 07:55 AM
may help you . I'm having a problem reading a text file in java and assigning it to an array. The program is running but I'm getting null. I tried changing the code to its simplest for just like what you see below. Because this one should really loop through the text file. But I'm doing it this way so that I will easily see where's the problem. But the problem is that I don't know why is it still outputting null. , Here's how you read a text file in Java using BufferedReader:
code :
    BufferedReader reader = null;
    try {
        reader = new BufferedReader( new FileReader( "J:\\questions.txt") );
        String line = null;
        do {
            line = reader.readLine();
            if( line != null ) {
                // Do Something with line                
            }
        } while( line != null );
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if( reader != null )
            try {
                reader.close();
            } catch (IOException e) {
            }
    }
C# How to skip number of lines while reading text file using Stream Reader?

C# How to skip number of lines while reading text file using Stream Reader?


By : Avilash Kumar
Date : March 29 2020, 07:55 AM
like below fixes the issue I have a program which reads a text file and processes it to be seperated into sections. , Try the following
code :
// Skip 5 lines
for(var i = 0; i < 5; i++) {
  tr.ReadLine();
}

// Read the rest
string remainingText = tr.ReadToEnd();
HTML 5 File Reader reading javaScript files

HTML 5 File Reader reading javaScript files


By : vikram sahu
Date : March 29 2020, 07:55 AM
Does that help Not sure what your $scope is but giving it a go.
As you use webkitGetAsEntry() I assume this is for Chrome. From the looks of it your code should give you an error. If it does not, there is likely something you have omitted. You should typically get something like:
code :
$scope.files[i].file(success_call_back, [error_call_back]);
function my_parser(file) {
        var fileReader = new FileReader();

        fileReader.onload = function (e) {
            console.log(fileReader.result);
        };

        fileReader.onerror = function(err) {
            console.log(err);
        };
        console.log('Read', file);
        // Here you could (should) switch to another read operation
        // such as text or binary array
        fileReader.readAsBinaryString(file);
}

$scope.files[0].file(my_parser);
if (file.type.match(/application\/javascript|text\/.*/)) {
    // Use text read
} else if (file.type.match(/^image\/.*/)) {
    // Use binary read, read as dataURL etc.
} else ...
Error While Reading a text file with stream reader

Error While Reading a text file with stream reader


By : Jigglepuf
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further 1) I'm trying to read a text file but it shows error Like , Basically, what Alex.K comment say:
code :
using (StreamReader sr = new StreamReader(@"D:\test1.txt"))
{
    while (sr.Peek() >= 0)
    {
        var line = sr.ReadLine();
        var items = line.Split(new[] { '\t', '\n' }).ToArray();
        if (items.Length != 3)
            continue;
        var Name = items[0].ToString();
        var Email = items[1].ToString();
        var Pwd = items[2].ToString();
        cmd.CommandText = "insert into Employees values('" + Name + "','" + Email + "','" + Pwd + "')";
        cmd.CommandType = CommandType.Text;
        cmd.ExecuteNonQuery();
    }
}
        using (StreamReader sr = new StreamReader(path)) 
        {
            while (sr.Peek() >= 0) 
            {
                Console.WriteLine(sr.ReadLine());
            }
        }
// this is baaaaad
cmd.CommandText = "insert into Employees values('" + Name + "','" + Email + "','" + Pwd + "')";

// will become
cmd.CommandText = "insert into Employees values(@Name, @Email, @Pwd)";
cmd.Parameters["@Name"].Value = Name;
cmd.Parameters["@Email"].Value = Email;
cmd.Parameters["@Pwd"].Value = Pwd;

// somewhere before, where you create command
cmd.Parameters.Add("@Name", type);
cmd.Parameters.Add("@Email", type);
cmd.Parameters.Add("@Pwd", type);
Issue with reading text file into numpy array using pandas reader

Issue with reading text file into numpy array using pandas reader


By : array212
Date : March 29 2020, 07:55 AM
I wish did fix the issue. It seems you need delim_whitespace=True in read_csv if separator is whitespace and header=None:
Then cast to float:
code :
u=pd.read_csv('data.txt', delim_whitespace=True, header=None).astype(float).values

print (u)
[[  1.44445500e+06   7.00000000e+00   8.00000000e+00   1.20000000e+01
    5.20000000e+01   4.50000000e+01   6.80000000e+01   7.00000000e+01]
 [  1.35679900e+06   3.00000000e+00   3.00000000e+00   4.50000000e+01
    3.40000000e+01   2.30000000e+01   2.20000000e+01   1.10000000e+01]]
u=pd.read_csv('data.txt', delim_whitespace=True, header=None).astype(float)

print (type(u.loc[0,0]))
<class 'numpy.float64'>
u=pd.read_csv('data.txt', dtype=np.float16, delim_whitespace=True, header=None).values
print (u)
[[ inf   7.   8.  12.  52.  45.  68.  70.]
 [ inf   3.   3.  45.  34.  23.  22.  11.]]
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