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Re:Ruby basics (1 viewing) (1) Guest
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TOPIC: Re:Ruby basics
#4511
ShriNi (User)
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Re:Ruby basics 3 Years, 11 Months ago Karma: 0  
The File.open Method

We can use File.open method to create a new file object and assign that file object to a file.

However, there is one difference in between File.open and File.new methods.


The difference is that the File.open method can be associated with a block, whereas you cannot do the same using the File.new method.
 
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Re:Ruby basics 3 Years, 11 Months ago Karma: 0  
Here is a list of the Different Modes of Opening a File:

Modes Description

r Read-only mode. The file pointer is placed at the beginning of the file. This is the default mode.

r+ Read-write mode. The file pointer will be at the beginning of the file
 
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Re:Ruby basics 3 Years, 11 Months ago Karma: 0  
w mode

Write-only mode. Overwrites the file if the file exists. If the file does not exist, creates a new file for writing.


w+ mode


Read-write mode. Overwrites the existing file if the file exists. If the file does not exist, creates a new file for reading and writing
 
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Re:Ruby basics 3 Years, 11 Months ago Karma: 0  
mode a


Write-only mode. The file pointer is at the end of the file if the file exists. That is, the file is in the append mode. If the file does not exist, it creates a new file for writing.
 
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Re:Ruby basics 3 Years, 11 Months ago Karma: 0  
mode a+

Read and write mode. The file pointer is at the end of the file if the file exists.

The file opens in the append mode. If the file does not exist, it creates a new file for reading and writing.
 
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Re:Ruby basics 3 Years, 11 Months ago Karma: 0  
Reading and Writing Files:


The same methods that we've been using for 'simple' I/O are available for all file objects

. So, gets reads a line from standard input, and aFile.gets reads a line from the file object aFile
 
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