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#scripting (6)

awk / gawk — Text Processing

Pattern-action language for structured text. Field splitting, built-in variables, arithmetic, string functions, arrays, BEGIN/END blocks, and practical data-processing recipes.
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fish — Friendly Interactive Shell

Comprehensive fish shell reference covering syntax, variables, functions, abbreviations, completions, config files, path management, prompt customization, Fisher plugins, and migration from bash/zsh.
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jq — JSON Processor

Slice, filter, map, and transform JSON data from the command line. Covers all essential filters, built-in functions, select, map, reduce, streaming, and real-world API response processing.
jq json data cli api scripting

sed — Stream Editor

Non-interactive text transformation. Substitution, deletion, insertion, address ranges, in-place editing, and multi-line patterns with practical recipes.
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PowerShell Essentials

Variables, operators, pipelines, Where-Object, ForEach-Object, Select-Object, sorting, grouping, remoting, jobs, CIM, registry, JSON, error handling, and common cmdlets.
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REXX Snippets

Practical REXX patterns for z/OS automation, TSO commands, and ISPF services.
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