Copy a file over SSH

Ruby's File class has a handy method binary? which checks whether a file is a binary file. This method might be telling the truth most of the time. But sometimes it doesn't, and that's what causes pain. The method is defined as follows:

Here is a hacky way to load dumps directly from the source server, without fully copying them over and extracting them first.

It [may break horribly for you](https://makandracards.com/makandra/595-dumping-and-importing-from-to-mysql-in-an-utf-8-s...

Using ffmpeg, you can easily re-encode a video to reduce its file size.

Command

Do it like this:

ffmpeg -i input.mp4 -c:v libx264 -crf 23 -preset slow -c:a copy -movflags +faststart output.mp4

Arguments

• -i input.mp4 specifie...

Greg Molnar has written a neat article about creating a single-file Rails app.
This is not meant for production use but can be useful to try things out, e.g. when hunting down a bug o...

In case Ruby does not detected the expected encoding of a file automatically you can specify the known encoding manually.

Example with File.open

file = File.open('some.bin', encoding: Encoding::ASCII_8BIT)
text = file.read
text.encoding =>...

When you drag a file from a Nautilus window into a terminal window, the file's path will be pasted into the terminal. This also works with multiple files.

To access files from another branch or past commit without doing a complete checkout, you can either use

git show branch:file
git show commit:file

to display, or check out the file into your working directory with

git checkout bra...

It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your file system access is slow because it goes over the network.

The culprit might be a library like carrierwave that ch...

Modern browsers natively suppport file pickers that allow the user to choose multiple files at once. To activate this feature, set the multiple attribute:

<input type="file" name="images[]" multiple />

Or in a Rails view:

<%= file_fie...

If you did file operations inside a shell or for example using Nautilus, it can take quite a while until RubyMine takes note of them and updates things like your project tree or its internal file list.

[Flushing ...