In this post we look at a few ways you can check to ensure that a file or directory exists using ruby.
Ruby delete file if exists.
File delete path to file if file exist path to file removing a directory.
The following tutorial describe how to delete files and directories that you no longer need in your application.
This method deletes the named files returning the number of names passed as.
Open the file with the open method.
You can read a file in ruby like this.
On unix based systems permissions are.
Array finds the record that matches these find style conditions such as color red.
A file is an abstraction of any file object accessible by the program and is closely associated with class io.
Returns true if a record exists in the table that matches the id or conditions given or false otherwise.
The argument can take five forms.
If the file argument is a symbolic link it will resolve the symbolic link and use the file referenced by the link.
If a file already exists but does not match update that file to match create if missing create a file only if the file does not exist.
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Returns true if the named file exists and is a regular file.
You can rename and delete files programmatically with ruby with the rename and delete methods.
Here is the process in detail.
File can be an io object.
How to read files in ruby.
Removing single file in ruby is simple and straightforward with file delete.
Close the file with the close method.
Read the file the whole file line by line or a specific amount of bytes.
File includes the methods of module filetest as class methods allowing you to write for example file exist foo.
Integer finds the record with this primary key.
In the description of file methods permission bits are a platform specific set of bits that indicate permissions of a file.
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Renaming and deleting files.
String finds the record with a primary key corresponding to this string such as 5.
Following is the example to rename an existing file test1 txt usr bin ruby rename a file from test1 txt to test2 txt file rename test1 txt test2 txt following is the example to delete an existing file.
Use the file class to open a file.
Checking whether a file exists or not is one of the most basic file related tasks which you will do most of the times and thankfully ruby s file class provides two methods called file file file exist to test file existence.
