ToDouble
Not available in this language yet.
ToDouble( value )
ToDouble( value )
ToDouble( value )
to_double( value )
ToDouble( value )
Description
The ToDouble
function converts a value to a double-precision numeric
value, if possible.
Attempting to convert a value to a double-precision numeric value which has no numeric representation results in an "invalid argument" error.
Host languages have varying support for double-precision numeric
values. Within Fauna, double-precision numeric values are
stored and operated on as 64-bit, IEEE 754, double-precision float
values. The host language you use may affect how the result of
ToDouble can be interpreted.
|
Parameters
Argument | Type | Definition and Requirements |
---|---|---|
|
Any |
The value to attempt to convert to a double-precision numeric value. |
Examples
The following query calls ToDouble
multiple times to demonstrate
variations on the kinds of values that ToDouble
accepts:
Not available in this language yet.
result, err := client.Query(
f.Arr{
f.ToDouble(1234.5678),
f.ToDouble(1234),
f.ToDouble("123.456789"),
f.ToDouble("0not-a-number"),
})
if err != nil {
fmt.Fprintln(os.Stderr, err)
} else {
fmt.Println(result)
}
[1234.5678 1234 123.456789 0]
System.out.println(
client.query(
Arr(
ToDouble(1234.5678),
ToDouble(1234),
ToDouble("123.456789"),
ToDouble("0not-a-number")
)
).get());
[1234.5678, 1234.0, 123.456789, 0.0]
client.query(
[
q.ToDouble(1234.5678),
q.ToDouble(1234),
q.ToDouble('123.456789'),
q.ToDouble('0not-a-number'),
]
)
.then((ret) => console.log(ret))
.catch((err) => console.error('Error: %s', err))
[ 1234.5678, 1234, 123.456789, 0 ]
result = client.query(
[
q.to_double(1234.5678),
q.to_double(1234),
q.to_double('123.456789'),
q.to_double('0not-a-number'),
]
)
print(result)
[1234.5678, 1234.0, 123.456789, 0.0]
println(Await.result(
client.query(
Arr(
ToDouble(1234.5678),
ToDouble(1234),
ToDouble("123.456789"),
ToDouble("0not-a-number")
)
),
5.seconds
))
[1234.5678, 1234.0, 123.456789, 0.0]
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