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Apex String And Regex

Category: Engineering  ·  Sub-category: performance  ·  Last updated:
Apex String class methods, Pattern/Matcher regex, text parsing, template rendering, and the null-safety landmines that bite every Apex programmer eventually. Covers `String.split` trailing-empty-drop semantics, `Pattern.compile` static-final caching, `Matcher.group` ordering rules, and the `String.format` MessageFormat-vs-printf trap. NOT for formula functions (FORMULA / TEXT in formula fields), NOT for SOQL string-bind escaping (see apex/dynamic-soql).

From the source SKILL.md

The Apex String class plus Pattern / Matcher is the everyday text-handling toolkit in Salesforce. Most Apex programmers learn it through error messages — NullPointerException on a method call, System.StringException from an m.group() with no preceding find(), a String.split result that's missing the last element, a String.format that prints %s literally. This skill encodes the boundary rules and the right-shape-first patterns so those errors stop happening.

What this skill does

Apex String And Regex is a community-contributed Claude Code skill in the performance sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/apex-string-and-regex/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Apex String And Regex Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/apex-string-and-regex
curl -L https://claudskills.com/skills/apex-string-and-regex/SKILL.md \
  -o ~/.claude/skills/apex-string-and-regex/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/apex-string-and-regex/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/apex-string-and-regex/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\apex-string-and-regex\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

More Engineering skills

Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Engineering skills → Top 100 skills
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