X10 reading from a file not as expected

Question

I encountered following behavior when reading from a text file.

val input = new File(inputFileName);
val inp = input.openRead();
Console.OUT.println(inp.lines().next());
if (inp.lines().hasNext())
     Console.OUT.println(inp.lines().next());

my input file contains

0 1
0 2
0 3

As a result I get

0 1
0 3

It seems that inp.lines().hasNext() has moved the pointer forward and as a result one line is skipped in the text file. Is this a bug?

thanks I guess.. though this put me down, I'm actually having a while loop instead of if, now I need to think of another termination criteria :( — Marina, Jun 23 '16 at 19:53

Josh Milthorpe · Accepted Answer · 2016-06-24T12:32:31.507

0

Yes, this looks like a bug. x10.io.FileReader.lines().hasNext() should not be skipping forward in the text file. Could you please raise an issue in the X10 JIRA project?

edited Jun 24 '16 at 12:32

answered Jun 24 '16 at 12:12

Josh Milthorpe

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Thanks, I have submitted a defect – Marina Jun 24 '16 at 18:12

X10 reading from a file not as expected

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