Int16Array

TheInt16Arraytyped array represents an array of twos-complement 16-bit signed integers in the platform byte order. If control over byte order is needed, useDataViewinstead. The contents are initialized to0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax(that is, using bracket notation).

语法

new Int16Array(length);
new Int16Array(typedArray);
new Int16Array(object);
new Int16Array(buffer [, byteOffset [, length]]);

For more information about the constructor syntax and the parameters, seeTypedArray.

属性

Int16Array.BYTES_PER_ELEMENTReturns a number value of the element size.2in the case of anInt16Array.Int16Array.lengthStatic length property whose value is 3. For the actual length(number of elements), seeInt16Array.prototype.length.Int16Array.nameReturns the string value of the constructor name. In the case of theInt16Arraytype:"Int16Array".Int16Array.prototypePrototype for theTypedArrayobjects.

方法

Int16Array.from()Creates a newInt16Arrayfrom an array-like or iterable object. See alsoArray.from().Int16Array.of()Creates a newInt16Arraywith a variable number of arguments. See alsoArray.of().

Int16Arrayprototype

AllInt16Arrayobjects inherit from%TypedArray%.prototype.

Properties

Int16Array.prototype.constructorReturns the function that created an instance's prototype. This is theInt16Arrayconstructor by default.Int16Array.prototype.buffer只读Returns theArrayBufferreferenced by theInt16ArrayFixed at construction time and thusread only.Int16Array.prototype.byteLength只读Returns the length(in bytes)of theInt16Arrayfrom the start of itsArrayBuffer. Fixed at construction time and thusread only.Int16Array.prototype.byteOffset只读Returns the offset(in bytes)of theInt16Arrayfrom the start of itsArrayBuffer. Fixed at construction time and thusread only.Int16Array.prototype.length只读Returns the number of elements hold in theInt16Array. Fixed at construction time and thusread only.

Methods

Int16Array.prototype.copyWithin()Copies a sequence of array elements within the array. See alsoArray.prototype.copyWithin().Int16Array.prototype.entries()Returns a newArray Iteratorobject that contains the key/value pairs for each index in the array. See alsoArray.prototype.entries().Int16Array.prototype.every()Tests whether all elements in the array pass the test provided by a function. See alsoArray.prototype.every().Int16Array.prototype.fill()Fills all the elements of an array from a start index to an end index with a static value. See alsoArray.prototype.fill().Int16Array.prototype.filter()Creates a new array with all of the elements of this array for which the provided filtering function returns true. See alsoArray.prototype.filter().Int16Array.prototype.find()Returns the found value in the array, if an element in the array satisfies the provided testing function orundefinedif not found. See alsoArray.prototype.find().Int16Array.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 alsoArray.prototype.findIndex().Int16Array.prototype.forEach()Calls a function for each element in the array. See alsoArray.prototype.forEach().Int16Array.prototype.includes()Determines whether a typed array includes a certain element, returningtrueorfalseas appropriate. See alsoArray.prototype.includes().Int16Array.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 alsoArray.prototype.indexOf().Int16Array.prototype.join()Joins all elements of an array into a string. See alsoArray.prototype.join().Int16Array.prototype.keys()Returns a newArray Iteratorthat contains the keys for each index in the array. See alsoArray.prototype.keys().Int16Array.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 alsoArray.prototype.lastIndexOf().Int16Array.prototype.map()Creates a new array with the results of calling a provided function on every element in this array. See alsoArray.prototype.map().Int16Array.prototype.move()未实现Former non-standard version ofInt16Array.prototype.copyWithin().Int16Array.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 alsoArray.prototype.reduce().Int16Array.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 alsoArray.prototype.reduceRight().Int16Array.prototype.reverse()Reverses the order of the elements of an array — the first becomes the last, and the last becomes the first. See alsoArray.prototype.reverse().Int16Array.prototype.set()Stores multiple values in the typed array, reading input values from a specified array.Int16Array.prototype.slice()Extracts a section of an array and returns a new array. See alsoArray.prototype.slice().Int16Array.prototype.some()Returns true if at least one element in this array satisfies the provided testing function. See alsoArray.prototype.some().Int16Array.prototype.sort()Sorts the elements of an array in place and returns the array. See alsoArray.prototype.sort().Int16Array.prototype.subarray()Returns a newInt16Arrayfrom the given start and end element index.Int16Array.prototype.values()Returns a newArray Iteratorobject that contains the values for each index in the array. See alsoArray.prototype.values().Int16Array.prototype.toLocaleString()Returns a localized string representing the array and its elements. See alsoArray.prototype.toLocaleString().Int16Array.prototype.toString()Returns a string representing the array and its elements. See alsoArray.prototype.toString().Int16Array.prototype[@@iterator]()Returns a newArray Iteratorobject that contains the values for each index in the array.

Examples

// From a length
var int16 = new Int16Array(2);
int16[0] = 42;
console.log(int16[0]); // 42
console.log(int16.length); // 2
console.log(int16.BYTES_PER_ELEMENT); // 2

// From an array
var arr = new Int16Array([21,31]);
console.log(arr[1]); // 31

// From another TypedArray
var x = new Int16Array([21, 31]);
var y = new Int16Array(x);
console.log(y[0]); // 21

// From an ArrayBuffer
var buffer = new ArrayBuffer(8);
var z = new Int16Array(buffer, 0, 4);

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