Legacy Code Preservation: Why Preserve the DSL?

A Domain-Specific Language (DSL) can provide some intellectual leverage. We can always write long and convoluted programs in a general-purpose programming language (like Python, Java or C).

Sometimes it can make more sense to invent a new domain-specific language and implement the solution in that language.

Sometimes, even well-written, highly …

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Legacy Code Preservation: How Do We Manage This?

At an insurance company, I encountered an application that had been in place for thirty years.

Classic flat-file, mainframe COBOL. And decades old. It had never been replaced with a packaged solution. It had never been converted to a SQL database. It had never been rewritten in VB to run …

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