How to write to file in Ruby?
You can use the short version:
File.write('/path/to/file', 'Some glorious content')
It returns the length written; see ::write for more details and options.
To append to the file, if it already exists, use:
File.write('/path/to/file', 'Some glorious content', mode: 'a')
This is preferred approach in most cases:
File.open(yourfile, 'w') { |file| file.write("your text") }
When a block is passed to File.open
, the File object will be automatically closed when the block terminates.
If you don't pass a block to File.open
, you have to make sure that file is correctly closed and the content was written to file.
begin
file = File.open("/tmp/some_file", "w")
file.write("your text")
rescue IOError => e
#some error occur, dir not writable etc.
ensure
file.close unless file.nil?
end
You can find it in documentation:
static VALUE rb_io_s_open(int argc, VALUE *argv, VALUE klass)
{
VALUE io = rb_class_new_instance(argc, argv, klass);
if (rb_block_given_p()) {
return rb_ensure(rb_yield, io, io_close, io);
}
return io;
}
Are you looking for the following?
File.open(yourfile, 'w') { |file| file.write("your text") }