IndexedCollectionInterval<T extends CollectionWithLength> Class
Object describing a (contiguous) subset of indices to an IndexedXYZCollection
Extended by
Methods
| Name | Description | |
|---|---|---|
| constructor(points: T extends CollectionWithLength, base: number, limit: number): IndexedCollectionInterval Protected | ||
| advanceBegin(): boolean | Add one to this.begin. | |
| advanceEnd(): boolean | advance this.end (but do not go beyond this.points.length) return true if the interval is still live. | |
| advanceToHead(other: IndexedCollectionInterval<T extends CollectionWithLength>): boolean | Advance this.begin to (other.begin), i.e. | |
| advanceToTail(other: IndexedCollectionInterval<T extends CollectionWithLength>): boolean | Advance this.begin to (other.end-1), i.e. | |
| localIndexToParentIndex(localIndex: number): number | undefined | Return (if possible) the parent index corresponding to localIndex |
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| restrictEnd(): void | restrict this.end to this.points.length | |
| setFrom(other: IndexedCollectionInterval<T extends CollectionWithLength>, base?: number, limit?: number): void | Set this interval from another, with conditional replacements: * Always reference the same points as other. |
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| createBeginEnd<T extends CollectionWithLength>(points: T extends CollectionWithLength, begin: number, end: number): IndexedCollectionInterval<T extends CollectionWithLength> Static | Create an interval which matches a collection from start <= i < end. |
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| createBeginLength<T extends CollectionWithLength>(points: T extends CollectionWithLength, begin: number, length: number): IndexedCollectionInterval<T extends CollectionWithLength> Static | Create an interval which matches a collection from start <= i < end. |
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| createComplete<T extends CollectionWithLength>(points: T extends CollectionWithLength): IndexedCollectionInterval<T extends CollectionWithLength> Static | Create an interval which matches a complete indexed collection. |
Properties
| Name | Type | Description | |
|---|---|---|---|
| begin | number | lower limit of index range | |
| end | number | upper limit (beyond) index range. | |
| isNonEmpty Accessor ReadOnly | boolean | Return true if length is 1 or more | |
| isSingleton Accessor ReadOnly | boolean | Return true if the length is exactly 1 | |
| isValidSubset Accessor ReadOnly | boolean | Return true if the interval is empty (the empty set is a subset of all sets!) all indices in its range are valid. |
|
| length Accessor ReadOnly | number | Return the number of steps possible with current begin and end | |
| points | T extends CollectionWithLength | Any collection that has a .length member or property |
Defined in
Last Updated: 08 January, 2020