isNan
isNaN returns a boolean value indicating whether or not the specified value is NaN (not-a-number).
Syntax
isNaN(value)
Parameters
| Parameter | Type | Description |
|---|---|---|
| value | byte | The value to check. |
| value | double | The value to check. |
| value | float | The value to check. |
| value | int | The value to check. |
| value | long | The value to check. |
| value | short | The value to check. |
| value | Byte | The value to check. |
| value | Double | The value to check. |
| value | Float | The value to check. |
| value | Integer | The value to check. |
| value | Long | The value to check. |
| value | Short | The value to check. |
Returns
true if the value parameter is NaN; false otherwise.
Examples
The following example shows how isNaN interacts with various objects within a table.
source = newTable(
floatCol("Float", (float)1.0),
floatCol("NullFloat", NULL_FLOAT),
floatCol("NaNFloat", (float)-1.0),
doubleCol("Double", 1.0),
doubleCol("NullDouble", NULL_DOUBLE),
doubleCol("NaNDouble", -1.0),
).update(
"NaNFloat = java.lang.Math.sqrt(NaNFloat)",
"NaNDouble = java.lang.Math.sqrt(NaNDouble)"
)
result = source.update(
"FloatNaN = isNaN(Float)",
"NullFloatNaN = isNaN(NullFloat)",
"NaNFloatNaN = isNaN(NaNFloat)",
"DoubleNaN = isNaN(Double)",
"NullDoubleNaN = isNaN(NullDouble)",
"NaNDoubleNaN = isNaN(NaNDouble)",
)
- source
- result