25.1. Profiles, prompts, and colors: customizing the shell25.1.1. PowerShell profiles25.1.2. Customizing the prompt25.1.3. Tweaking colors25.2. Operators: -as, -is, -replace, -join, -split, -in, -contains25.2.1. -as and -is25.2.2. -replace25.2.3. -join and -split25.2.4. -contains and -in25.3. String manipulation25.4. Date manipulation25.5. Dealing with WMI dates25.6. Setting default parameter values25.7. Playing with script blocks25.8. More tips, tricks, and techniques