Justintime50

Import a Relative Module in Python

This is great when testing a local version of something like a client library and you need to test your changes and not import the globally installed version.

Usage

import sys
sys.path.insert(0, "/path/to/your/package_or_module")
import my_module

Justintime50

Reset your Xcode Install on macOS

Having troubles with Xcode or their Command Line Tools? Follow this guide to reset your Xcode instance on macOS and resolve issues such as "No Xcode or CLT version detected!"

• Alternatively download Xcode directly

1) Check if Xcode is installed

xcode-select -print-path

Justintime50

Setup a Mail Server on macOS

After years of trying to setup a mail server on macOS without requiring dependencies or messing with ports to trick my ISP into letting mail out, I figured out a solution.

Note: This guide is opinionated towards a Gmail setup.

Steps

1. Backup the existing Postfix configuration:

Justintime50

Use Your SSH Agent in a Crontab

Getting access to SSH inside a Crontab is often a problem for many as the environment in which your cron runs is not the same as your normal shell. Simply running ssh-add will not allow you to use your SSH Agent inside your crontab. Follow the below guide to setup your crontab to use your ssh-agent:

Usage

1. Install Keychain.
2. Add the following to your ~/.zlogin file which will be invoked on each login. This will allow your crontab (and normal shell) to use your ssh keys and bypass needing to punch in your password each time you need SSH. This will also span across multiple sessions and shells.

Justintime50

Convert JKS (Java Keystore) Files to PEM Files

Install

This process requires keytool and openssl.

Usage

keytool -importkeystore -srckeystore my_in_file.jks -destkeystore my_out_file.p12 -deststoretype PKCS12

Justintime50

Compare Two Lists

When you need to find a difference in large lists, simply compare their indexes one at a time and break when something doesn't match.

Usage

x = ['a', 'b', 'c']
y = ['a', 'c', 'c']

Justintime50

Benchmarking

ZSH

$ for i in $(seq 1 5); do time zsh -i -c exit; done
zsh -i -c exit  0.18s user 0.18s system 97% cpu 0.364 total
zsh -i -c exit  0.19s user 0.19s system 98% cpu 0.382 total
zsh -i -c exit  0.18s user 0.19s system 99% cpu 0.372 total
zsh -i -c exit 0.19s user 0.20s system 98% cpu 0.391 total

Justintime50

# Install an executable into your path from a tar archive
URL="https://github.com/Justintime50/freedom/releases/download/v0.2.0/freedom_0.2.0_linux_amd64.tar.gz" \
TAR=${URL##*/} \
BINARY="free" \
curl -LJO "$URL" && tar -xf "$TAR" "$BINARY" && mv "$BINARY" "$HOME/bin/$BINARY" && rm "$TAR"

Justintime50

Slug an HTML Field in Laravel

Follow this guide to learn how to easily slug an HTML field in Laravel. You can also use this guide for other HTML projects with some tweaking.

Usage

HTML

The following is an example where when text is entered into the title field, it will dynamically slug it in the slug field.

Justintime50

Setup DNSMasq for Localhost Development

Local development requires you to edit your /etc/hosts file constantly to add custom local domains. Maintaining this file across machines and projects can become taxing. Let's use a service like dnsmasq to dynamically set any .localhost domain to point to 127.0.0.1

# Install dnsmasq
brew install dnsmasq
sudo brew services start dnsmasq

# Configure