Once

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Evaluates an expression once and returns the cached result

Формы

Once[expr]

Once[expr, loc]

Проверенные примерыOnce[result = CloudGet["https://www.wolframcloud.com/objects/ecdc9d78-f517-4682-93d8-790a3de79ee0"]] → CloudGet[https://www.wolframcloud.com/objects/ecdc9d78-f517-4682-93d8-790a3de79ee0]Once[Print["pang"];2] → 2 Once[Print["pong"];1 + 1] → 2Опции

ExpirationDate — default None
PersistenceTime — default None

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Темы

New In110 Alphabetical Listing - O
Package Development - Initialization
Session Customization - Locale & International Customization»
Summary Of New Features In110 - Evaluation Control
Summary Of New Features In110 - Evaluation Control
Wolfram System Setup - Initialization »

Связанное

LocalCache Needs PersistenceLocation ScheduledTask WithCleanup SetOptions Off On

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