INCLUDES

INCLUDES checks whether a container includes a given value.


Argument	Type	Default value	Description
`haystack`	`String` `Any[]` `Object` `Iterable`		The value container.
`needle`	`Any`		The target value to assert.

Returns Boolean A boolean value that indicates whether a container contains a given value.

COUNT

Source

COUNT returns the number of elements in a collection.


Argument	Type	Default value	Description
`collection`	`Collection`		The collection to count.

Returns Int The number of elements in the collection.

COUNT_DISTINCT

Source

COUNT_DISTINCT computes the number of distinct elements in the given collection and returns the count as an integer.


Argument	Type	Default value	Description
`collection`	`Collection`		The collection to count distinct elements in.

Returns Int The number of distinct elements in the collection.

LENGTH

LENGTH returns the number of elements or characters in a value.


Argument	Type	Default value	Description
`value`	`String` `Any[]` `Object` `Binary`		The value to measure.

Returns Int The length of the value — number of characters for strings, number of elements for arrays and objects, number of bytes for binary values.

REVERSE

Source

REVERSE returns the reverse of a given string or array value.


Argument	Type	Default value	Description
`value`	`String` `Any[]`		The string or array to reverse.

Returns String Any[] A reversed version of a given value.

Next steps

Learn Standard library Functions and types available to every Ferret script. Learn Array Operators Array expansion, flattening, inline expressions, the question mark operator, and array comparison operators. Learn For Loops Iterate over collections and ranges, and shape results with FILTER, SORT, LIMIT, and COLLECT.