Booleans¶
boolean¶
Description |
Examples |
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Arguments:
FUNCTION(default-value-expression(0|1}
VALUES(value-expression{1})
Translates all non-null input values to booleans. If no default value expression
is given, values that don’t parse as boolean values will be silently
ignored. If not, the evaluated value from the default expression will
be used as a replacement value. String literals are case insensitive,
and the supported values are “true” and “false”.
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["boolean", "false"]Returns one boolean: false.
["boolean", null]Returns
null.["boolean",["list", "true", "~rhttp://www.example.org/","True", false, 1234]]Returns a list of booleans: [true, true, false]. The URI and integer
values are ignored.
["boolean", ["boolean", false],["list", "true", "~rhttp://www.example.org/","124.4", "FALSE"]]Returns a list of booleans: [true, false, false, false]. The URI value
and the string value are replaced with the literal value: false
["boolean", ["string", "n/a"],["list", "true", "~rhttp://www.example.org/", "124.4"]]Returns a list of booleans: [true, “n/a”, “n/a”]. The URI value and
the string value are replaced with the literal value “n/a”
["boolean", ["string", "_."],["list", "true", "~rhttp://www.example.org/", "False"]]Returns a list of booleans: [true, “http://www.example.org/”, false].
The URI value is replaced with its string cast.
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is-boolean¶
Description |
Examples |
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Arguments:
VALUES(value-expression{1})
Boolean function that returns true if value is a boolean literal or if
it is a list, that the first element in the list is a boolean
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["is-boolean", false]Returns true.
["is-boolean", "True"]Returns false.
["is-boolean", ["list", true, "12345"]]Returns true.
["is-boolean", ["list", "12345", true]]Returns false.
["is-boolean", ["list", ["boolean", "FALSE"], 1234]]Returns true.
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