26.1 Profiles, prompts, and colors: Customizing the shell26.1.1 PowerShell profiles26.1.2 Customizing the prompt26.1.3 Tweaking colors26.2 Operators: -as, -is, -replace, -join, -split, -contains, -in26.2.1 -as and -is26.2.2 -replace26.2.3 -join and -split26.2.4 -contains and -in26.3 String manipulation26.4 Date manipulation26.5 Dealing with WMI dates26.6 Setting default parameter values26.7 Playing with script blocks26.8 More tips, tricks, and techniques