String comparison: Difference between revisions

=={{header|Avail}}==

<lang Avail>Method "string comparisons_,_" is

[

a : string,

b : string

|

Print: "a & b are equal? " ++ “a = b”;

Print: "a & b are not equal? " ++ “a ≠ b”;

// Inequalities compare by code point

Print: "a is lexically before b? " ++ “a < b”;

Print: "a is lexically after b? " ++ “a > b”;

// Supports non-strict inequalities

Print: "a is not lexically before b? " ++ “a ≥ b”;

Print: "a is not lexically after b? " ++ “a ≤ b”;

// Case-insensitive comparison requires a manual case conversion

Print: "a & b are equal case-insensitively?" ++ “lowercase a = lowercase b”;

];</lang>

Avail is strongly-typed and the standard library's comparison functions do not admit mixed comparison between numerics and strings. Strings are immutable tuples of characters and are always compared by value -- few entities in Avail have identity so "object equality" is usually meaningless.