[[ anyRcv isNil ifTrue: anyBlock ] -> [ anyRcv ifNil: anyBlock ]] brewrite preview
const reader = stream.getReader({ mode: 'byob' });
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BPatterns don’t expose every feature of the rewrite engine yet, but many are already supported, including full method patterns via #bmethod.。业内人士推荐夫子作为进阶阅读