Compare string using locale

Compares string values using locale rules

Evaluation

This expression evaluates to a function of the form:

(a, b) -> long

The function is consistent with sort order semantics of the Sort step.

Arguments a and b are compared and one of the following values is returned:

An error is thrown if either a or b is not a string and not nil

Name	Type	Description
Locale	string	The locale to use. Different locales have different conventions on how to sort accented letters and special characters.
Collator Strength	string	This setting determines locale-specific rules as to which characters to consider distinct. As a general approximation, the following rules apply: IDENTICAL: all differences in unicode character composition are considered distinct TERTIARY: accented letters and case are considered distinct, so `a != á` and `a != A`, but different unicode compositions of characters resulting in the same glyph are considered equal SECONDARY: accented letters are considered distinct, but not case, so `a != á` and `a == A` PRIMARY: only base letters are considered distinct, but not accented letters or case, so `a == á` and `a == A`
Key Cache Size	long	Strings can be compared faster using comparison keys. Generating comparison keys incurs a one-time overhead that is compensated as strings are then repeatedly compared, for example during sorting. This setting determines the size of the LRU cache the function uses to store comparison keys.
Nil Values	string	Defines how to sort `nil` values: first: `nil` is considered smaller than any non-nil value last: `nil` is considered greater than any non-nil value