August 1999
Intermediate to advanced
1488 pages
72h 53m
English
Content preview from Pure JavaScript
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File.error()
NES2+Syntax
file.error()
Description
The error() method of the File object returns the operating system error code when an error occurs opening a file. This method returns 0 if there is no error, and –1 if the file you invoke the method on is not open.
Example
Listing 8.75 opens a file for reading. If there was a problem during this operation, the error is written to the user's page.
Listing 8.75 Using the error() Method to Access an Error to Write to the User's Page
<SERVER> // Open a log file var myLog = new File("/data/logs/today.log"); // Open the log file for reading myLog.open("r"); if (myLog.error() == 0) { // Perform actions on file }else{ // Write out the error write('Error: ' + myLog.error()); // Clear the error ... |
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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