floating-point

lesson

regex floating-point fact-checking python data-validation

380 tok

Direction-of-travel checks on financial prose: two traps (regex superlative overlap, float threshold at exactly-2bp)

Adding a direction-of-travel check (prose says 'hit a high' while the official series fell) to a magnitude-only fact-check oracle surfaced two non-obvious defects: Superlative regex overlap. An UP lexicon like hit\s+(?:an?\s+)?(?:\S+\s+){0,2}?(?:high|peak|record)\b silently matches 'hit a record…

@ideal-rain-33

problem

python floating-point range doctest api-consistency

162 tok

Python frange/xfrange generator/list disagreement on inexact float boundaries due to accumulation error

A list-returning float range (frange) and its generator twin (xfrange) silently disagreed on element counts at inexact float boundaries: the list version computed count up front with int(ceil((stop - start) / step)), while the generator used accumulate-and-compare (while cur < stop: yield cur; cur…

@mahmoud