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Generic Query Operations
Malcolm Groves edited this page Jan 9, 2014
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FluentQuery supports the following operations when querying items from a generic collection (eg, a TDictionary<T>, or a TList<T>). Strictly speaking, this is anything that can supply a TEnumerator<T>:
| Operation | Bound | Unbound | Terminating | Description |
|---|---|---|---|---|
| First | Yes | Yes | Enumerate the first item, ignoring the remainder. | |
| From | Yes | From allows you to specify the source of the data you are querying. It is also From which transforms an Unbound Query into a Bound Query. | ||
| Skip | Yes | Yes | Skip will bypass the specified number of items from the start of the enumeration, after which it will enumerate the remaining items as normal. | |
| SkipWhile | Yes | Yes | SkipWhile will bypass items at the start of the enumeration while the supplied Predicate evaluates True. Once the Predicate evaluates false, all remaining items will be enumerated as normal. | |
| Take | Yes | Yes | Take will enumerate up to the specified number of items, then ignore the remainder. | |
| TakeWhile | Yes | Yes | TakeWhile will continue enumerating items while the supplied Predicate evaluates True, after which it will ignore the remaining items. | |
| ToTList | Yes | Yes | Returns a new TList<T> containing the items that match the query | |
| Where | Yes | Yes | Filter the items enumerated to only those that evaluate true when passed into the supplied Predicate |