feat: improve Standard.kt

[Water-OR]

New Methods added to Standard.kt

Any?.isNull(): Boolean

• Map null to true, otherwise false

Any?.notNull(): Boolean

• Map null to false, otherwise true

Note

This method is an inverse version of Any.isNull(): Boolean

Any?.invNull(): Unit?

• Map null to Unit, otherwise null (Invert nullability but lose the reference infomation)

<R> Any?.onNull(action: ()->R): R

• Map null to invokation result of action, otherwise null

<T : Any> T?.mapNull(action: ()->T): T

• Map null to invokation result of action, otherwise the receiver object

<R> Any?.then(action: ()->R): R

• Return invokation result of action

Boolean.takeT(): Boolean?

• Map false to null, otherwise true

Boolean.takeF(): Boolean?

• Map true to null, otherwise false

Note

This method is an inverse version of Boolean.takeT(): Boolean?