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jangaroo-runtime.2.0.19.source-code.isNaN.as Maven / Gradle / Ivy

/**
 * API and documentation by Adobe?.
 * Licensed under http://creativecommons.org/licenses/by-nc-sa/3.0/
 */
package {

/**
 * Returns true if the value is NaN(not a number). The isNaN() function is useful for checking whether a mathematical expression evaluates successfully to a number. The most common use of isNaN() is to check the value returned from the parseInt()and parseFloat() functions. The NaN value is a special member of the Number data type that represents a value that is "not a number."
 * 
Note: The NaN value is not a member of the int or uint data types.
 * 
The following table describes the return value of isNaN() on various input types and values. (If your compiler warnings are set to Strict Mode, some of the following operations will generate compiler warnings.)
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
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 * 
 * 
 * 
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 * 
 * 
 * 
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 * 
Input Type/Value
Example
Return Value
0 divided by 0
isNaN(0/0)
true
Non-zero number divided by 0
isNaN(5/0)
false
Square root of a negative number
isNaN(Math.sqrt(-1))
true
Arcsine of number greater than 1 or less than 0
isNaN(Math.asin(2))
true
String that can be converted to Number
isNaN("5")
false
String that cannot be converted to Number
isNaN("5a")
true
 * @param num A numeric value or mathematical expression to evaluate.
 *
 * @return Returns true if the value is NaN(not a number) and false otherwise.
 *
 */
[Native]
public native function isNaN(num : *) : Boolean;

}