The Javascript Float64Array represents an array of 64-bit floating-point numbers in the platform byte order. By default, the contents of Float64Array are initialized with 0.
The float64Array.from() method is used to create a new Float64Array from an array-like or iterable object. So when you want to convert an arrayLike or iterable object to Float64Array then you can use this function by passing the object as a parameter to this function along with the map function and value used for the map function if needed.
Syntax:
Float64Array.from( source, mapFn, thisArg )
Parameters: This method accepts three parameters as mentioned above and described below:
- source: This parameter holds an array-like or iterable object which is used to convert into a Float64Array object.
- mapFn: This parameter is optional and holds the Map function to call on every element of the Float64Array array.
- thisArg: This parameter is optional and holds the value to use as this when executing mapFn.
Return Value: This method returns a new Float64Array instance.
Below examples illustrate the working of Float64Array.from() function in JavaScript:
Example 1: This example shows the basic working of the Float64Array.from() function in JavaScript.
javascript
// Create a Float64Array from a string like structurelet array = Float64Array.from('12345324354342354245342');// Print the resultconsole.log(array); |
Output:
1, 2, 3, 4, 5, 3, 2, 4, 3, 5, 4, 3, 4, 2, 3, 5, 4, 2, 4, 5, 3, 4, 2
Example 2: This example shows the basic working of the Float64Array.from() function in JavaScript.
javascript
// Create a Float64Array from an array by// multiplying 3999.99 to each number// using functionlet array = Float64Array.from( [432.3343, 13243.3243123, 1324232132.24551], z => z * 3999.99);// Print the resultconsole.log(array); |
Output:
1729332.8766569998, 52973164.81595687, 5296915286660.718
