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- 1Six Currency Mistakes Developers Make When Handling Money in Code●Floats, decimal places, symbols, base vs quote, and stale rates. Practical JavaScript and Python examples for handling m
A new write-up walks through six common currency mistakes developers make, covering floating-point arithmetic, decimal places, currency symbols, base versus quote currency, and stale exchange rates, with practical JavaScript and Python examples. It is aimed at engineers building fintech, banking or e-commerce systems where small rounding errors can cause real financial problems.
- 2Python test fixture exposes allocation bug in banking ledger●A 100-unit Python fixture exposes a balanced total with wrong customer allocations. Twelve tests cover backing, reservat
A developer has built a 100-unit Python test fixture that reveals a ledger balancing to the correct total while individual customer allocations are wrong. Twelve tests cover backing, reservations and invalid snapshots, aiming to catch faults that aggregate checks miss. The example is being shared as a lesson in financial software testing, where totals can look sound even when per-account balances are incorrect.