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XLSX CSV Batch Converter Field Guide: When Five Mode Choices Decide What Your Spreadsheet Actually Becomes
XLSX CSV Batch Converter Field Guide: When Five Mode Choices Decide What Your Spreadsheet Actually…
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Markdown Link Extractor Field Guide: When [text](url) Hides Six Different Link Behaviors Inside One Document
Five Markdown link categories need separate inventory entries. The extractor's JSON output pipelines into a link checker, an a11y audit, and a redirect map without re-parsing the source.
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OpenAPI to TypeScript Generator Field Guide: When Six Controls Decide If the Generated Types Compile in a Strict-Mode Codebase
The generated TypeScript sits in the same repo as your hand-written code, and the moment…
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IBAN & SWIFT Code Validator Field Guide: When Two Bank Identifiers Share One Input Box But Use Different Checksums
The cross-border payment hits your invoice queue at 4:47 AM on a Tuesday. The customer swears the IBAN is correct, your bank says the SWIFT is misrouted, and your finance team is going to spend the...
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UUID Validator Field Guide: When a Well-Formed String Still Fails the Version and Variant Check
Most UUID bugs are well-formed strings carrying an unsupported version, non-conformant variant bits, or a sentinel value a regex waves through.
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Test Data Faker Builder Field Guide: When Five Hand-Typed Fixture Rows Are A False Green
Hand-written fixtures encode the author blind spots twice. A field-config generator produces the awkward rows nobody types: apostrophes, absent optionals, Luhn-valid cards, checksum IDs.