Collections

Modifier	Description
`filter`	Filter returns a subset of a slice where a nested field matches a value.
`find`	Find returns the first element in a slice or map where a field equals the given value.
`first`	First returns the first character of a string or the first element of a slice.
`flatten`	Flatten flattens a slice of slices by one level.
`has`	Has returns true if the slice or map contains the given value.
`is`	Is returns true if the value equals any of the given parameters.
`key`	Key extracts a value from a map or slice by key path or index.
`last`	Last returns the last character of a string or the last element of a slice.
`map`	Map converts a slice of maps into a map keyed by the given field's string value.
`merge`	Merge converts a slice of maps into a map keyed by the given field's string value.
`pluck`	Pluck extracts a single field from each element of a slice of maps and returns a slice of values.
`sort`	Sort sorts a slice in ascending or descending order.
`sum`	Sum returns the numeric sum of the elements of a slice.
`wrap`	Wrap wraps the value in a map under the given key.

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