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[B! postgresql] PostgreSQL 18からNOT NULL制約をNOT V...
行ごとに異なる値の非NULLなカラムを追加したいというケースもあります。このような場合「一度NULLを許可してカラムを追...アニメとゲーム テクノロジー PostgreSQL 18からNOT NULL制約をNOT VALIDで追加できるようになりました -...b.hatena.ne.jp/entry/s/www.m3tech.blog/entry/2026/03/13/110000 -
Assert (Spring Framework 7.0.2 API)
object is null . Assert.isNull(value, "The value must be null"); Parameters:...the object is not null isNull @Contract ("!null, _ -> fail") public...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/Assert.html -
ObjectUtils (Spring Framework 7.0.5 API)
@Contract ("null, null -> true; null, _ -> false; _, null -> false")...true if both are null or false if only one is null . static int nullSafeHash...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/ObjectUtils.html -
Lagged features for time series forecasting — s...
16 null null null null null null null null null null null null...null null 40 16 null null null null null null null null null null...scikit-learn.org/stable/auto_examples/applications/plot_time_series_lagged_features.html -
TriggerContext (Spring Framework 7.0.5 API)
or null if not scheduled before. default...completion time of the task, or null if not scheduled before. default...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/scheduling/TriggerCo... -
AbstractMessageSource (Spring Framework 7.0.5 API)
returning null if not found. @Nullable MessageSource...parent of this MessageSource, or null if none. protected boolean ...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/context/support/Abst... -
StringUtils (Spring Framework 7.0.5 API)
quote @Contract ("null -> null; !null -> !null") public static...@Contract ("null -> null; !null -> !null") public static @Nullable...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/StringUtils.html -
DelegatingMessageSource (Spring Framework 7.0.5...
or null if none. void setParentMessageSour...object can't resolve. May be null , in which case no further resolution...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/context/support/Dele... -
CollectionUtils (Spring Framework 7.0.2 API)
or null if not found findValueOfType @Contract ("null, _ ->...firstElement @Contract ("null -> null") public static <T> @Nullable...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/util/CollectionUtils... -
AbstractValueAdaptingCache (Spring Framework 7....
also hold a cached null value. A straight null being returned means...(may be null to bypass a type check; in case of a null value found...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/cache/support/Abstra...