Ruby File Open Relative Path

Iterates over the children of the directory files and subdirectories not recursive. Ruby file 类和方法 file 表示一个连接到普通文件的 stdio 对象 open 为普通文件返回该类的一个实例类方法序号方法描述 1file atime path 返回 path 的最后访问时间 2file basename path suffix 返回 path 末尾的文件名如果指定了 suffix 则它会从文件名末尾被删除. The require method takes the name of the file to require as a string as a single argument this can either be a path to the file such as lib some library rb or a shortened name such as some library if the argument is a path and complete filename the require method will look there for the file.

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The value of the block will be returned from file open.

Ruby file open relative path.

Ruby provides a whole set of i o related methods implemented in the kernel module. Relative paths are referenced from the current working directory of the process unless dir string is given. Suppose we are in bin mygem and want the absolute path of lib mygem rb. To learn a few other basic file manipulation functions in ruby check out this course.

If you enter the command properly you will get the result nil. Expand path ruby usr bin usr bin ruby a more complex example which also resolves parent directory is as follows. It yields pathname object for each child. If a file is being created its initial permissions may be set using the perm parameter.

Relative paths are referenced from the current working directory of the process unless dir string is given. Stack overflow for teams is a private secure spot for you and your coworkers to find and share information. When a rails application is initialized the file expand path method is used in the config and script directories as well as the rakefile. The class io provides all the basic methods such as read write gets puts readline getc and printf.

The command to close an open file is. All the i o methods are derived from the class io. This chapter will cover all the basic i o functions available in ruby. Example to read from a file open a file and read from it file open test1 rb r do f1 while line f1 gets puts line end end f1 close.

Using the require method. Expand path ruby usr bin. By default the yielded pathnames will have enough information to access the files. As noted by theo in this stackoverflow post file expand path is used to get the absolute path when the relative path is known i think file expand path is somewhat antiquated now that require relative exists but it is work studying a rails still uses it.