August 1999
Intermediate to advanced
1488 pages
72h 53m
English
Content preview from Pure JavaScript
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File.open()
NES2+Syntax
file.open(option)
Description
The open() method of the File object is used to open a file to read, write, and/or append to. The method returns true if it is successful and false otherwise. The options passed determine the mode in which the file is opened. The options are specified in Table 8.16.
| Option | Description |
|---|---|
| a | This option opens a file for appending. If the file does not exist, it is created. This method always returns true. |
| a+ | This option opens a file for reading and appending. If the file does not exist, it is created. This method always returns true. |
| r | This option opens a file for reading. If the file exists, the method returns true; otherwise, it returns false. |
| r+ | This option ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.