Selection functions

Reference documentation for Expressif functions in the array/selection scope.

Name	Overview
closest-by	Returns the original source element whose expression result is nearest to the numeric target. Preserves the first match on ties and skips null criteria. Returns null for empty arrays, all-null criteria, or non-array input.
first-elements	Returns up to the requested number of elements from the start of the input enumerable. Returns null when the input is not an enumerable, is a string, or the count is negative.
last-elements	Returns up to the requested number of elements from the end of the input enumerable, preserving their order. Returns null when the input is not an enumerable, is a string, or the count is negative.
max-by	Returns the original source element whose expression result is greatest. Preserves the first match on ties and skips null criteria. Returns null for empty arrays, all-null criteria, or non-array input.
min-by	Returns the original source element whose expression result is smallest. Preserves the first match on ties and skips null criteria. Returns null for empty arrays, all-null criteria, or non-array input.
single	Returns the only element of the input array without transforming it. Returns null when the input is empty, contains more than one element, or cannot be evaluated as an array.
skip-first-elements	Omits the requested number of elements from the start of the input enumerable and returns the remainder. Returns null when the input is not an enumerable, is a string, or the count is negative.
skip-last-elements	Omits the requested number of elements from the end of the input enumerable and returns the remainder. Returns null when the input is not an enumerable, is a string, or the count is negative.
slice-elements	Returns the elements in the zero-based half-open range from start, inclusive, to end, exclusive. Returns null when the input is not an enumerable, is a string, or either bound is negative.
value-at	Returns the input item at the specified zero-based position. Returns null when the position is negative or out of range, or the input cannot be evaluated.