Learn more. One-liner to recursively list directories in Ruby? Ask Question. Asked 11 years, 10 months ago. Active 4 years, 1 month ago. Viewed 68k times. How about including files? Improve this question. Lance Lance And, you could find this out using a benchmark and quick testing.
Add a comment. Active Oldest Votes. Improve this answer. What about hidden files and directories? Thanks x-yuri! The flag btw is specified like this: Dir. It uses a single wildcard, the asterisk. The asterisk will match zero or more characters, so any file ending in.
The glob method will return all files that match the globbing rules as an array, which can be saved for later use or iterated over. There are only a few wildcards to learn:. One thing to consider is case sensitivity. It's up to the operating system to determine whether TEST. TxT refer to the same file. On Linux and other systems, these are different files. On Windows, these will refer to the same file. The operating system is also responsible for the order in which the results are displayed.
It may differ if you're on Windows versus Linux , for example. One final thing to note is the Dir[globstring] convenience method. If the file does not exist, creates a new file for writing. 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.
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. Read and write mode. The file opens in the append mode. If the file does not exist, it creates a new file for reading and writing. So, gets reads a line from standard input, and aFile. You can use the method sysread to read the contents of a file. You can open the file in any of the modes when using the method sysread.
This statement will output the first 20 characters of the file. The file pointer will now be placed at the 21st character in the file. You can use the method syswrite to write the contents into a file. You need to open the file in write mode when using the method syswrite.
This method belongs to the class File. The class File is a subclass of the class IO. NotImplementedError is raised on other platforms, such as Windows, which doesn't provide the function.
Returns the current position in dir. See also Dir seek. Synonym for Dir seek , but returns the position parameter. Reads the next entry from dir and returns it as a string. Returns nil at the end of the stream. Seeks to a particular location in dir. Hack your world. Feed your head. Live curious. Home Core 3. Home Classes Methods.
In Files dir. Parent Object. Included Modules Enumerable. Files History. Dir Objects of class Dir are directory streams representing directories in the underlying file system. Class Dir: Inherits from class Object. Returns whether the given path is an empty directory. Returns whether the given path is a directory. Public Class Methods Dir[ string [, string Equivalent to calling Dir.
File dir.
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