3.2 The TABLE-EXTENSIONS module
case-insensitive-equal
Function
Summary
Compares two strings for equality, ignoring case differences between them.
Library
common-extensions
Module
table-extensions
Signature
case-insensitive-equal string1 string2 => boolean
Arguments
- string1
- An instance of
<string>. - string2
- An instance of
<string>.
Values
- boolean
- An instance of
<boolean>.
Description
Compares string1 and string2 for equality, ignoring any case differences between them. Returns true if they are equal and false otherwise.
The function has the same behavior as Dylan's standard method on = for sequences, except that when comparing alphabetical characters, it ignores any case differences.
This function is used as an equivalence predicate by case-insensitive-string-hash.
This function uses as-uppercase or as-lowercase to convert the characters in its string arguments.
Example
The case-insensitive-equal function returns true if passed the following strings:
"The Cat SAT ON the Mat"
"The cat sat on the Mat"
Conversely, the standard method on = returns false when passed those strings.