BigInt64Array

BigInt64Array typed array represents an array of 64-bit signed integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0n . Once established, you can reference elements in the array using the object's methods, or by using standard array index syntax (that is, using bracket notation).

构造函数

BigInt64Array()
创建新的 BigInt64Array 对象。

静态特性

BigInt64Array.BYTES_PER_ELEMENT
Returns a number value of the element size. 8 in the case of a BigInt64Array .
BigInt64Array.name
Returns the string value of the constructor name. In the case of the BigInt64Array type, this is "BigInt64Array".

静态方法

BigInt64Array.from()
创建新的 BigInt64Array from an array-like or iterable object. See also Array.from() .
BigInt64Array.of()
创建新的 BigInt64Array with a variable number of arguments. See also Array.of() .

实例特性

BigInt64Array.prototype.buffer
返回 ArrayBuffer referenced by the BigInt64Array . This is fixed at construction time and thus read only .
BigInt64Array.prototype.byteLength
Returns the length (in bytes) of the BigInt64Array from the start of its ArrayBuffer . This is fixed at construction time and thus read only.
BigInt64Array.prototype.byteOffset
Returns the offset (in bytes) of the BigInt64Array from the start of its ArrayBuffer . This is fixed at construction time and thus read only.
BigInt64Array.prototype.length
Returns the number of elements hold in the BigInt64Array . This is fixed at construction time and thus read only.

实例方法

BigInt64Array.prototype.copyWithin()
Copies a sequence of array elements within the array. See also Array.prototype.copyWithin() .
BigInt64Array.prototype.entries()
返回新 Array Iterator object that contains the key/value pairs for each index in the array. See also Array.prototype.entries() .
BigInt64Array.prototype.every()
Tests whether all elements in the array pass the test provided by a function. See also Array.prototype.every() .
BigInt64Array.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() .
BigInt64Array.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() .
BigInt64Array.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() .
BigInt64Array.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() .
BigInt64Array.prototype.forEach()
Calls a function for each element in the array. See also Array.prototype.forEach() .
BigInt64Array.prototype.includes()
Determines whether a typed array includes a certain element, returning true or false as appropriate. See also Array.prototype.includes() .
BigInt64Array.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() .
BigInt64Array.prototype.join()
Joins all elements of an array into a string. See also Array.prototype.join() .
BigInt64Array.prototype.keys()
返回新 Array Iterator that contains the keys for each index in the array. See also Array.prototype.keys() .
BigInt64Array.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() .
BigInt64Array.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() .
BigInt64Array.prototype.reduce()
Applies a function against an accumulator and each value of the array (from left-to-right) so as to reduce it to a single value. See also Array.prototype.reduce() .
BigInt64Array.prototype.reduceRight()
Applies a function against an accumulator and each value of the array (from right-to-left) so as to reduce it to a single value. See also Array.prototype.reduceRight() .
BigInt64Array.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() .
BigInt64Array.prototype.set()
Stores multiple values in the typed array, reading input values from a specified array.
BigInt64Array.prototype.slice()
Extracts a section of an array and returns a new array. See also Array.prototype.slice() .
BigInt64Array.prototype.some()
Returns true if at least one element in this array satisfies the provided testing function. See also Array.prototype.some() .
BigInt64Array.prototype.sort()
Sorts the elements of an array in place and returns the array. See also Array.prototype.sort() .
BigInt64Array.prototype.subarray()
返回新 BigUint64Array from the given start and end element index.
BigInt64Array.prototype.values()
返回新 Array Iterator object that contains the values for each index in the array. See also Array.prototype.values() .
BigInt64Array.prototype.toLocaleString()
Returns a localized string representing the array and its elements. See also Array.prototype.toLocaleString() .
BigInt64Array.prototype.toString()
Returns a string representing the array and its elements. See also Array.prototype.toString() .
BigInt64Array.prototype[@@iterator]()
返回新 Array Iterator object that contains the values for each index in the array.

范例

Different ways to create a BigInt64Array

// From a length
var bigint64 = new BigInt64Array(2);
bigint64[0] = 42n;
console.log(bigint64[0]); // 42n
console.log(bigint64.length); // 2
console.log(bigint64.BYTES_PER_ELEMENT); // 8
// From an array
var arr = new BigInt64Array([21n,31n]);
console.log(arr[1]); // 31n
// From another TypedArray
var x = new BigInt64Array([21n, 31n]);
var y = new BigInt64Array(x);
console.log(y[0]); // 21n
// From an ArrayBuffer
var buffer = new ArrayBuffer(32);
var z = new BigInt64Array(buffer, 0, 4);
// From an iterable
var iterable = function*(){ yield* [1n, 2n, 3n]; }();
var bigint64 = new BigInt64Array(iterable);
// BigInt64Array[1n, 2n, 3n]
					

规范

规范
ECMAScript (ECMA-262)
The definition of 'BigInt64Array' in that specification.

浏览器兼容性

更新 GitHub 上的兼容性数据
Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet Node.js
BigInt64Array Chrome 67 Edge 79 Firefox 68 IE No Opera 54 Safari No WebView Android 67 Chrome Android 67 Firefox Android 68 Opera Android 48 Safari iOS No Samsung Internet Android 9.0 nodejs 10.4.0
BigInt64Array() 构造函数 Chrome 67 Edge 79 Firefox 68 IE No Opera 54 Safari No WebView Android 67 Chrome Android 67 Firefox Android 68 Opera Android 48 Safari iOS No Samsung Internet Android 9.0 nodejs 10.4.0

图例

完整支持
完整支持
不支持
不支持

另请参阅

Metadata

  1. 标准内置对象
  2. TypedArray
  3. 特性
    1. TypedArray.BYTES_PER_ELEMENT
    2. TypedArray.name
    3. TypedArray.prototype.buffer
    4. TypedArray.prototype.byteLength
    5. TypedArray.prototype.byteOffset
    6. TypedArray.prototype.length
    7. get TypedArray[@@species]
  4. 方法
    1. TypedArray.from()
    2. TypedArray.of()
    3. TypedArray.prototype.copyWithin()
    4. TypedArray.prototype.entries()
    5. TypedArray.prototype.every()
    6. TypedArray.prototype.fill()
    7. TypedArray.prototype.filter()
    8. TypedArray.prototype.find()
    9. TypedArray.prototype.findIndex()
    10. TypedArray.prototype.forEach()
    11. TypedArray.prototype.includes()
    12. TypedArray.prototype.indexOf()
    13. TypedArray.prototype.join()
    14. TypedArray.prototype.keys()
    15. TypedArray.prototype.lastIndexOf()
    16. TypedArray.prototype.map()
    17. TypedArray.prototype.reduce()
    18. TypedArray.prototype.reduceRight()
    19. TypedArray.prototype.reverse()
    20. TypedArray.prototype.set()
    21. TypedArray.prototype.slice()
    22. TypedArray.prototype.some()
    23. TypedArray.prototype.sort()
    24. TypedArray.prototype.subarray()
    25. TypedArray.prototype.toLocaleString()
    26. TypedArray.prototype.toString()
    27. TypedArray.prototype.values()
    28. TypedArray.prototype[@@iterator]()
  5. Related pages:
  6. Int8Array
  7. Uint8Array
  8. Uint8ClampedArray
  9. Int16Array
  10. Uint16Array
  11. Int32Array
  12. Uint32Array
  13. Float32Array
  14. Float64Array
  15. BigInt64Array
  16. BigUint64Array
  17. 继承:
  18. Function
  19. 特性
    1. Function.arguments
    2. Function.caller
    3. Function.displayName
    4. Function.length
    5. Function.name
  20. 方法
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toSource()
    5. Function.prototype.toString()
  21. Object
  22. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
  23. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()