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Flat Array Symbol Table: O(1) Metadata Lookup

Medium · low_latency · Quant Developer interview question · flat-array, direct-index, symbol-table, low_latency, cache-locality, O(1)

In high-frequency trading, order routers require sub-50 nanosecond lookups for per-symbol metadata. When symbol IDs are compact integers, a flat array provides guaranteed O(1) worst-case performance, superior to hash maps by avoiding hash computations and collisions. This direct-address table design is a foundational technique for building low-latency systems in quantitative finance. Task Implement a SymbolTable class with the following methods to manage a direct-indexed symbol table: void s