Typed Array Extensions
require.mx('mxjs/base/utilities/typed_array_extensions.js');
Adds convenience methods to the TypedArray types.
TypedArray
TypedArray.countIf
TypedArray.find
TypedArray.findIndex
TypedArray.forEach
TypedArray.join
TypedArray.map
TypedArray.mapToType
TypedArray.minMaxIndices
TypedArray.minMaxValues
TypedArray.readFromColumn
TypedArray.readFromColumnStrict
TypedArray.reduce
TypedArray.slice
TypedArray.transform
TypedArray.writeToColumn
| Status | Name |
|---|
Category: library
This library does not return anything (there is no need to save the result of the call to
require.mx()). When the library is loaded, it will add methods to the
TypedArray prototypes. So, simply
require.mx() the library prior to attempting to use any of the extension methods.
Class: TypedArray
A placeholder for all of the builtin
TypedArray classes. That is, all of the methods listed for this class are in fact defined for each of the concrete
TypedArray classes:
Int8Array,
Uint8Array,
Uint8ClampedArray,
Int16Array,
Uint16Array,
Int32Array,
Uint32Array,
Float32Array, and
Float64Array.
| Status | Name |
|---|---|
 |
Number countIf
(
Function callback,
Object thisArg
)
Count the number of elements in this TypedArray for which a given predicate returns true. |
|
find
(
Function callback,
Object thisArg
)
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/find |
|
findIndex
(
Function callback,
Object thisArg
)
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/findIndex |
|
forEach
(
Function callback,
Object thisArg
)
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/forEach |
|
String join
(
String separator
)
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/join |
|
type map
(
Function callback,
Object thisArg
)
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/map |
|
type mapToType
(
Function type,
Function callback,
Object thisArg
)
This is analagous to TypedArray.prototype.map(), except that the type of the returned array is defined by the caller (in the first parameter). This is useful, for example, if you are mapping from an integer array to a float array. |
|
Object minMaxIndices
(
)
Find the indices of the minimum and maximum values in this TypedArray. |
|
Object minMaxValues
(
)
Find the minimum and maximum values of all elements in this TypedArray. |
|
TypedArray readFromColumn
(
Function readFn,
Number begin,
Number end,
Number defaultValue
)
This is a static method (it is called directly on the type, not on an object of that type, e.g.
|
|
TypedArray readFromColumnStrict
(
Function readFn,
Number begin,
Number end
)
This is a static method (it is called directly on the type, not on an object of that type, e.g.
|
|
? reduce
(
Function callback,
Object initialValue
)
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/map |
|
type slice
(
Number begin,
Number end
)
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/slice |
|
transform
(
Function ↓callback,
Object ↓thisArg
)
Transform each element of the TypedArray using the given callback function. This is equivalent to the code: |
|
writeToColumn
(
Function writeFn,
Number offset
)
Writes the values in this array to a table column, using the provided write function. |
Count the number of elements in this TypedArray for which a given predicate returns true.
Parameters:-
Functioncallback - the predicate, which receives three parameters: an element value, the index of the element, and this TypedArray; and must return a truthy value if the element should be counted. -
ObjectthisArg - (optional) used asthiswhen calling the predicate function.
Number count - the number of elements for which the predicate returned a truthy value
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/join
Parameters:-
Stringseparator - (optional)
String result
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/map
Parameters: Returns:type result - an array with the same type as this array, containing the values produced by the callback function.
This is analagous to TypedArray.prototype.map(), except that the type of the returned array is defined by the caller (in the first parameter). This is useful, for example, if you are mapping from an integer array to a float array.
Parameters:-
Functiontype - a TypedArray type (e.g.Float64Array). -
Functioncallback -
ObjectthisArg - (optional)
type result - an array with type type, containing the values produced by the callback function.
Find the indices of the minimum and maximum values in this TypedArray.
Parameters:Object results
Find the minimum and maximum values of all elements in this TypedArray.
Parameters:Object results
This is a static method (it is called directly on the type, not on an object of that type, e.g.
Float64Array.readFromColumn(...)).
-
FunctionreadFn -
Numberbegin -
Numberend -
NumberdefaultValue - (optional) If not specified, NaN is used.
TypedArray values
This is a static method (it is called directly on the type, not on an object of that type, e.g.
Float64Array.readFromColumn(...)). If any value in the column is missing, this function returns null.
TypedArray values
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/map
Parameters: Returns:? result - of the reduction
This is a polyfill, only added if the standard builtin method does not exist. You can read the definition of the builtin method at: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/slice
Parameters: Returns:type an - array with the same type as this array
Transform each element of the TypedArray using the given callback function. This is equivalent to the code:
for (let i = 0; i < array.length; ++i) {
array[i] = callback.call(thisArg, array[i], i, array);
}