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Uint16Array 는 플랫폼별 바이트 오더에 따라 16비트 unsigned integer를 배열 형태로 나타냅니다. 만일 바이트 오더의 제어가 필요한 경우 DataView 를 사용하시기 바랍니다. 각 배열 요소는 0으로 초기화됩니다. 일단 정해지게 되면, 배열의 각 요소들을 객체 메소드나 배열 인덱스([])를 사용해서 참조할 수 있습니다. 

Syntax

new Uint16Array(); // new in ES2017
new Uint16Array(length);
new Uint16Array(typedArray);
new Uint16Array(object);
new Uint16Array(buffer [, byteOffset [, length]]);

생성자와 파라미터에 대한 더 많은 정보를 얻으시려면 TypedArray 를 확인하시기 바랍니다.

Properties

Uint16Array.BYTES_PER_ELEMENT
Returns a number value of the element size. 2 in the case of an Uint16Array.
Uint16Array.length
Static length property whose value is 0. For the actual length (number of elements), see Uint16Array.prototype.length.
Uint16Array.name
Returns the string value of the constructor name. In the case of the Uint16Array type: "Uint16Array".
Uint16Array.prototype
Prototype for the TypedArray objects.

Methods

Uint16Array.from()
Creates a new Uint16Array from an array-like or iterable object. See also Array.from().
Uint16Array.of()
Creates a new Uint16Array with a variable number of arguments. See also Array.of().

Uint16Array prototype

All Uint16Array objects inherit from %TypedArray%.prototype.

Properties

Uint16Array.prototype.constructor
Returns the function that created an instance's prototype. This is the Uint16Array constructor by default.
Uint16Array.prototype.buffer Read only
Returns the ArrayBuffer referenced by the Uint16Array Fixed at construction time and thus read only.
Uint16Array.prototype.byteLength Read only
Returns the length (in bytes) of the Uint16Array from the start of its ArrayBuffer. Fixed at construction time and thus read only.
Uint16Array.prototype.byteOffset Read only
Returns the offset (in bytes) of the Uint16Array from the start of its ArrayBuffer. Fixed at construction time and thus read only.
Uint16Array.prototype.length Read only
Returns the number of elements hold in the Uint16Array. Fixed at construction time and thus read only.

Methods

Uint16Array.prototype.copyWithin()
Copies a sequence of array elements within the array. See also Array.prototype.copyWithin().
Uint16Array.prototype.entries()
Returns a new Array Iterator object that contains the key/value pairs for each index in the array. See also Array.prototype.entries().
Uint16Array.prototype.every()
Tests whether all elements in the array pass the test provided by a function. See also Array.prototype.every().
Uint16Array.prototype.fill()
Fills all the elements of an array from a start index to an end index with a static value. See also Array.prototype.fill().
Uint16Array.prototype.filter()
Creates a new array with all of the elements of this array for which the provided filtering function returns true. See also Array.prototype.filter().
Uint16Array.prototype.find()
Returns the found value in the array, if an element in the array satisfies the provided testing function or undefined if not found. See also Array.prototype.find().
Uint16Array.prototype.findIndex()
Returns the found index in the array, if an element in the array satisfies the provided testing function or -1 if not found. See also Array.prototype.findIndex().
Uint16Array.prototype.forEach()
Calls a function for each element in the array. See also Array.prototype.forEach().
Uint16Array.prototype.includes()
Determines whether a typed array includes a certain element, returning true or false as appropriate. See also Array.prototype.includes().
Uint16Array.prototype.indexOf()
Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found. See also Array.prototype.indexOf().
Uint16Array.prototype.join()
Joins all elements of an array into a string. See also Array.prototype.join().
Uint16Array.prototype.keys()
Returns a new Array Iterator that contains the keys for each index in the array. See also Array.prototype.keys().
Uint16Array.prototype.lastIndexOf()
Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found. See also Array.prototype.lastIndexOf().
Uint16Array.prototype.map()
Creates a new array with the results of calling a provided function on every element in this array. See also Array.prototype.map().
Uint16Array.prototype.move() Unimplemented
Former non-standard version of Uint16Array.prototype.copyWithin().
Uint16Array.prototype.reduce()
Apply a function against an accumulator and each value of the array (from left-to-right) as to reduce it to a single value. See also Array.prototype.reduce().
Uint16Array.prototype.reduceRight()
Apply a function against an accumulator and each value of the array (from right-to-left) as to reduce it to a single value. See also Array.prototype.reduceRight().
Uint16Array.prototype.reverse()
Reverses the order of the elements of an array — the first becomes the last, and the last becomes the first. See also Array.prototype.reverse().
Uint16Array.prototype.set()
Stores multiple values in the typed array, reading input values from a specified array.
Uint16Array.prototype.slice()
Extracts a section of an array and returns a new array. See also Array.prototype.slice().
Uint16Array.prototype.some()
Returns true if at least one element in this array satisfies the provided testing function. See also Array.prototype.some().
Uint16Array.prototype.sort()
Sorts the elements of an array in place and returns the array. See also Array.prototype.sort().
Uint16Array.prototype.subarray()
Returns a new Uint16Array from the given start and end element index.
Uint16Array.prototype.values()
Returns a new Array Iterator object that contains the values for each index in the array. See also Array.prototype.values().
Uint16Array.prototype.toLocaleString()
Returns a localized string representing the array and its elements. See also Array.prototype.toLocaleString().
Uint16Array.prototype.toString()
Returns a string representing the array and its elements. See also Array.prototype.toString().
Uint16Array.prototype[@@iterator]()
Returns a new Array Iterator object that contains the values for each index in the array.

Examples

Different ways to create a Uint16Array:

// From a length
var uint16 = new Uint16Array(2);
uint16[0] = 42;
console.log(uint16[0]); // 42
console.log(uint16.length); // 2
console.log(uint16.BYTES_PER_ELEMENT); // 2

// From an array
var arr = new Uint16Array([21,31]);
console.log(arr[1]); // 31

// From another TypedArray
var x = new Uint16Array([21, 31]);
var y = new Uint16Array(x);
console.log(y[0]); // 21

// From an ArrayBuffer
var buffer = new ArrayBuffer(8);
var z = new Uint16Array(buffer, 0, 4);

// From an iterable
var iterable = function*(){ yield* [1,2,3]; }(); 
var uint16 = new Uint16Array(iterable); 
// Uint16Array[1, 2, 3]

Specifications

Specification Status Comment
Typed Array Specification Obsolete Superseded by ECMAScript 2015.
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'TypedArray constructors' in that specification.
Standard Initial definition in an ECMA standard. Specified that new is required.
ECMAScript Latest Draft (ECMA-262)
The definition of 'TypedArray constructors' in that specification.
Draft ECMAScript 2017 changed the Uint16Array constructor to use the ToIndex operation and allows constructors with no arguments.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support7 Yes41011.65.1
Uint16Array() without new throws Yes Yes44 No Yes ?
Iterable in constructor ? ?52 ? ? ?
Constructor without arguments ? ?55 ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4 Yes Yes411.64.2 Yes
Uint16Array() without new throws ? ? ?44 ? ? ?
Iterable in constructor ? ? ?52 ? ? ?
Constructor without arguments ? ? ?55 ? ? ?

Compatibility notes

Starting with ECMAScript 2015, Uint16Array constructors require to be constructed with a new operator. Calling a Uint16Array constructor as a function without new, will throw a TypeError from now on.

var dv = Uint16Array([1, 2, 3]);
// TypeError: calling a builtin Uint16Array constructor
// without new is forbidden
var dv = new Uint16Array([1, 2, 3]);

See also

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