How to open and read a file in one line in ruby

Question

How would this be written to be on a single line?

in_file = open(from_file)
indata = in_file.read

indata = File.open(from_file).read. from_file - path to file — Ilya, Apr 01 '16 at 15:42
Some examples here: http://stackoverflow.com/questions/5545068/what-are-all-the-common-ways-to-read-a-file-in-ruby — orde, Apr 01 '16 at 15:47
"How would this be written to be on a single line?" – Use semicolon instead of newline. Always works, you can write *any* Ruby program, no matter how complex, in one single line. — Jörg W Mittag, Apr 01 '16 at 23:32

score 8 · Accepted Answer · answered Apr 01 '16 at 16:47

8

File.read("/path/to/file")

It will read whole file content and return it as a result.

answered Apr 01 '16 at 16:47

SunnyMagadan

score 1 · Answer 2 · answered Apr 01 '16 at 15:48

1

open("README.md").read

For very small file, this is acceptable.

answered Apr 01 '16 at 15:48

dvxam

score 0 · Answer 3 · answered Mar 26 '23 at 17:36

0

To read ONE line you can use File.readline

Given:

cat file
Line 1
Line 2
Line 3
Line 4

In Ruby:

f=File.open("/tmp/file")

p f.readline 
# "Line 1\n"

answered Mar 26 '23 at 17:36

dawg

3 Answers3