Ruby output file

The example opens a file called stones. We open a stones file. The default mode is a read mode. The stones file contains nine names of valued stones, each on a separate line. The while block ends when we reach the end of file. This script shows another way of reading a file's contents. The code example prints its own code to the terminal. The readlines reads all lines from the specified file and returns them in the form of an array.

We go through the array with the each method and print the lines to the terminal. In this section, we work with directories. We have a Dir class to work with directories in Ruby. With the exists? The pwd method prints a current working directory. This is the directory from which we launched the script. The chdir method changes to another directory. Finally, we remove a directory with the rmdir method. This time the exists? In the second example, we retrieve all of a directory's entries, including its files and subdirectories.

We get the array of files and directories of a current directory. The inspect method gives us a more readable representation of the array. The third example works with a home directory. Every user in a computer has a unique directory assigned to him. It is called a home directory. It is a place where he can place his files and create his own hierarchy of directories. If we do not specify the user name, then a home directory of a current user is returned. The current user is the owner of the script file.

Someone, who has launched the script. Ruby has several ways to execute external programs. We will deal with some of them. In our examples we use well known Linux commands. Readers with Windows or Mac can use commands specific for their systems. The system command executes an external program in a subshell. The method belongs to the Kernel Ruby module. Here we execute the pwd command using backticks.

The command returns the current working directory. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ruby - How to write a new file with output from script Ask Question. Asked 11 years, 10 months ago. Active 6 years, 11 months ago. Viewed 40k times.

I have a simple script that does some search and replace. This is basically it: File. How can I do this? Improve this question. Add a comment.

The types and ranges are checked just like message fields and RepeatedField elements. Given the. When reading the value back, it will be a symbol if the enum value is known, or a number if it is unknown. Since proto3 uses open enum semantics, any number may be assigned to an enum field, even if it was not defined in the enum. If more than one name has this number, returns the first that was defined.

Enum resolve symbol : Returns the number for this enum name, or nil if none was found. Enum descriptor : Returns the descriptor for this enum. However, unlike regular fields, at most one of the fields in a oneof can be set at a time, so setting one field will clear the others.

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