Prolog DCGs in Practice: Efficient Parsing and DSL Building
Learn how Prolog's Definite Clause Grammars simplify parsing and DSL creation with a concrete example and practical tips.
Loading…
ReadMeFeed / Community knowledge
#parsing
Real questions. Useful conversations. Find the people who know your stack.
prologDCGs in Prolog: Declarative Grammar Parsing with Difference Lists
DCGs let you write context‑free grammars declaratively; they compile to ordinary predicates with a difference‑list argument, enabling parsing and generation in one step.
Debugging Rexx: Resolving Undefined Variables and Parsing Logic Failures
Learn how to diagnose and fix silent logic failures in Rexx, including uninitialized variable behavior, PARSE instruction errors, and global scope collisions.
rexxParsing Small DSLs with Prolog Definite Clause Grammars
How Prolog's Definite Clause Grammars (DCGs) let you parse small DSLs and structured input using unification and backtracking, without a separate parser generator.
Parsing Configuration Files with Prolog Definite Clause Grammars
Learn how to implement a configuration parser using Prolog's Definite Clause Grammars (DCGs) to transform structured text into usable Prolog terms.
Build a Datadog Log Pipeline for Custom Log Formats with Grok, Remappers, and Category Processor
Step‑by‑step guide to ingest‑time parse custom logs, map reserved fields, and verify results in Datadog, with rollback options.
datadogSplitting Delimited Strings in Rexx Using the PARSE Statement
Learn how to use the Rexx PARSE statement to efficiently split delimited strings into named variables, including handling empty fields and dynamic field counts.
Diagnosing JSON Parse Failures in Application Payloads
A diagnostic guide to JSON parse failures: how to recognize common error signatures, map causes (trailing commas, encoding, truncation, type mismatches), ordered checks, fixes tied to findings, and when to escalate to schema or infrastructure investigation.
jsonUsing Definite Clause Grammars in Prolog for Simple Parsers
Learn how Prolog’s Definite Clause Grammars hide difference‑list plumbing, letting you write clean parsers that also generate sentences, with a worked example and notes on left recursion and performance.