Code snippets

You will find here 10 code snippets I find useful so I don't have to Google ™ or Stackoverflow ™ them when I need. There are also code snippets I always forget! 😁 Sometimes, related links to the code will be available. The main difference with other random snippets you will find on the web is that in most cases (for the Symfony related ones) you will be able to run them directly from this website to check the output so you can verify it works as expected ™.

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Executing simple math operations in the terminal (bash, fish)

This snippet shows how to execute simple math operations in the terminal using shells like bash or fish. In this example, we calcu...

terminal

Published on 2024-07-02 • Modified on 2024-07-02

terminal shell bash fish

Preventing duplicates in bash history

This snippet shows how to prevent duplicates in bash history. Note that it is automatically done when using Fishshell. ...

bash

Published on 2024-04-27 • Modified on 2024-04-27

bash history fish Linux duplicate

Displaying the status code of the last executed command in the terminal

This snippet shows how to display the status code of the last executed command in the terminal. It can be helpful in shell scripts...

terminal

Published on 2023-10-21 • Modified on 2023-10-21

terminal bash sh script Fish shell unix posix cli

Executing a Make target inside a target

This snippet shows how to execute a given Make target inside a target. When you want to run a target before another, you can put a...

make

Published on 2023-03-15 • Modified on 2023-03-15

make target bash shell script

Getting the columns count of the terminal

In this snippet, we see how to get the columns count of the terminal. The two following commands produce the same result. In the f...

terminal

Published on 2021-12-21 • Modified on 2021-12-21

terminal unix shell process bash

Replacing text in a file with SED on macOS

In this snippet, we see how to replace text in a file with SED on macOS. Sometimes Unix commands do not behave exactly as they wou...

mac

Published on 2021-07-14 • Modified on 2021-07-14

mac macOS unix DevOps bash

A better Docker MySQL heathcheck

When you use a database container for MySQL, you start the service by calling docker-compose up -d db. But, if you run a Symfony c...

Docker

Published on 2021-02-06 • Modified on 2021-02-06

Docker Docker compose MySQL container service bash

Checking if the Elasticsearch service of a Docker container is ready

This is the third part of the "wait-for-this-service" series (check the links below the code). In the last snippet, we saw how to ...

Docker

Published on 2020-09-08 • Modified on 2020-09-08

Docker Docker compose elasticsearch container service bash

Checking if the MySQL service of a Docker container is ready

In the previous snippet, we saw how to do it for a Postgres service; now it's for MySQL. The process is similar, but there is a sl...

Docker

Published on 2020-09-03 • Modified on 2020-09-03

Docker Docker compose MySQL container service bash

Checking if the Postgres service of a Docker container is ready

In this snippet, we will see how to wait for the Postgres service to be available before using it. It's to avoid the following kin...

Docker

Published on 2020-08-30 • Modified on 2020-08-30

Docker Docker compose postgres container service bash