Hello, I would like to compare in a loop files and to obtain the result through an integer (1=OK, 0=FALSE). I use the following code: for n in 1:10 run(`diff file_a file_b`) end If the 2 files file_a and file_b are identical, the code is OK. If the 2 fils are different, the code gives an erro…

You’ll want to use success to test command success, rather than run: success(`diff file_a file_b`) Note that if all you want to know if whether they differ or not, you may want to use the UNIX cmp command instead: if success(`cmp --quiet file_a file_b`) # they are the same else # they are…

[image] StefanKarpinski: if success(`cmp --quiet file_a file_b`) --quiet is a GNU-ism; if you want it to work with any POSIX cmp you should use -s. Of course, this won’t work on Windows. It would be pretty easy to write an equivalent Julia function, though, like: function filecmp(path1::A…

[image] stevengj: (Python provides filecmp.cmp in its standard library, I wonder if Julia should too?) Probably a good idea. Worth opening an issue for.

Are you sure this should be in stdlib? Just a package would be fine IMO.

True, it’s on the border between basic enough to include in stdlib and not-needed-often-enough to belong in stdlib. On the other hand, what I like about it is that the API is absolutely crystal clear and won’t change—comparing two files to see if they’re bit-for-bit identical is always going to mean…

[image] StefanKarpinski: comparing two files to see if they’re bit-for-bit identical is always going to mean the same thing Until feature requests are opened for perfectly reasonable extensions :wink: Eg even the dead simple shell command cmp can ignore initial regions, compare up to a given…

[image] StefanKarpinski: comparing two files to see if they’re bit-for-bit identical is always going to mean the same thing There are a couple of variations of what it can mean for files to be “identical”: a and b are different files, that happen to contain identical data a and b are hard-l…

How can I capture the output of diff (the lines that are different) in a Julia variable? I tried using read(command::Cmd, String) but it fails since diff exits with an error whenever the two files are different. Edit: I found a way: diff_output = read(ignorestatus(`diff $file1 $file2`), String)

How to obtain the result of a diff between 2 files in a loop?

General Usage

steph_de_paris May 2, 2019, 6:30pm 3

Thanks !

Topic		Replies	Views
[ANN] FileCmp.jl Package Announcements file	2	902	February 24, 2022
Check that two julia files lead to the same code General Usage	6	377	December 21, 2022
Code_native diff General Usage	3	1050	October 7, 2019
Running an external program with non-zero return values General Usage question	2	389	September 12, 2021
Recommendations for comparing printouts e.g. `@code_` General Usage text-analysis	3	192	September 12, 2025

How to obtain the result of a diff between 2 files in a loop?

Related topics