Casefold
Casefold( value, [ normalizer ] )
Casefold( value, [ normalizer ] )
Casefold( value, [ normalizer ] )
Casefold( value, [ normalizer ] )
casefold( value, [ normalizer ] )
casefold( value, [ normalizer ] )
Casefold( value, [ normalizer ] )
Casefold( value, [ normalizer ] )
Description
The Casefold
function returns a normalized string. When strings are
transformed into their normalized forms, canonical-equivalent strings
have precisely the same binary representation. Then, a binary comparison
function such as equals
can compare two strings for case-insensitive
matching.
The Unicode Standard provides well-defined normalization forms (see Section 5.18, Case Mappings).
By default, FaunaDB uses NKFCCaseFold
as recommended by the
W3C, but provides NFKCCaseFold
,
NFC
, NFD
, NFKC
, NFKD
.
Parameters
Argument | Type | Definition and Requirements |
---|---|---|
|
String |
A string to normalize. |
|
String |
Optional - The name of the normalizer method to use. Must be one of "NFKCCaseFold", "NFC", "NFD", "NFKC", or "NFKD". Defaults to "NFKCCaseFold". |
Examples
The query below converts the string "Hen Wen" to "hen wen" to support case-insensitive matching.
curl https://db.fauna.com/ \
-u fnAChGwBcAACAO70ziE0cfROosNJHdgBmJU1PgpL: \
-d '{ "casefold": "Hen Wen" }'
client.Query(Casefold("Hen Wen"));
System.out.println(
client.query(Casefold(Value("Hen Wen")))
.get());
result, _ := client.Query(f.Casefold("Hen Wen"))
fmt.Println(result)
client.query(Casefold("Hen Wen"))
client.query(q.casefold("Hen Wen"))
$client.query do
casefold 'Hen Wen'
end
client.query(Casefold("Hen Wen"))
client.query(q.Casefold('Hen Wen'))
.then((ret) => console.log(ret))
HTTP/1.1 200 OK
{ "resource": "hen wen" }
"hen wen"
"hen wen"
hen wen
"hen wen"
"hen wen"
"hen wen"
"hen wen"
hen wen
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