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diff --git a/files/pt-br/web/javascript/reference/global_objects/float64array/index.html b/files/pt-br/web/javascript/reference/global_objects/float64array/index.html new file mode 100644 index 0000000000..63a7ae3f33 --- /dev/null +++ b/files/pt-br/web/javascript/reference/global_objects/float64array/index.html @@ -0,0 +1,160 @@ +--- +title: Float64Array +slug: Web/JavaScript/Reference/Global_Objects/Float64Array +translation_of: Web/JavaScript/Reference/Global_Objects/Float64Array +--- +<div>{{JSRef}}</div> + +<p>The <strong><code>Float64Array</code></strong> typed array represents an array of 64-bit floating point numbers (corresponding to the C <code>double</code> data type) in the platform byte order. If control over byte order is needed, use {{jsxref("DataView")}} instead. The contents are initialized to <code>0</code>. 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).</p> + +<h2 id="Constructor">Constructor</h2> + +<dl> + <dt><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array/Float64Array"><code>Float64Array()</code></a></dt> + <dd>Cria um novo objeto <code>Float64Array</code></dd> +</dl> + +<h2 id="Static_properties">Static properties</h2> + +<dl> + <dt>{{jsxref("TypedArray.BYTES_PER_ELEMENT", "Float64Array.BYTES_PER_ELEMENT")}}</dt> + <dd>Retorna um valor numerico de tamanho . <code>8</code> no caso de um <code>Float64Array</code>.</dd> + <dt>{{jsxref("TypedArray.name", "Float64Array.name")}}</dt> + <dd>Retorna uma string com o nome do contructor. no caso de<code>Float64Array</code> type: "Float64Array".</dd> +</dl> + +<h2 id="Static_methods">Static methods</h2> + +<dl> + <dt>{{jsxref("TypedArray.from", "Float64Array.from()")}}</dt> + <dd>Cria um novo <code>Float64Array</code> a partir de um array-like ou um objeto iteravel . tambem como {{jsxref("Array.from()")}}.</dd> + <dt>{{jsxref("TypedArray.of", "Float64Array.of()")}}</dt> + <dd>Cria um novo <code>Float64Array</code> com um numero variado de argumentos. tambem como {{jsxref("Array.of()")}}.</dd> +</dl> + +<h2 id="Instance_properties">Instance properties</h2> + +<dl> + <dt>{{jsxref("TypedArray.prototype.buffer", "Float64Array.prototype.buffer")}}</dt> + <dd>Returns the {{jsxref("ArrayBuffer")}} referenced by the <code>Float64Array</code> Fixed at construction time and thus <strong>read only</strong>.</dd> + <dt>{{jsxref("TypedArray.prototype.byteLength", "Float64Array.prototype.byteLength")}}</dt> + <dd>Returns the length (in bytes) of the <code>Float64Array</code> from the start of its {{jsxref("ArrayBuffer")}}. Fixed at construction time and thus <strong>read only.</strong></dd> + <dt>{{jsxref("TypedArray.prototype.byteOffset", "Float64Array.prototype.byteOffset")}}</dt> + <dd>Returns the offset (in bytes) of the <code>Float64Array</code> from the start of its {{jsxref("ArrayBuffer")}}. Fixed at construction time and thus <strong>read only.</strong></dd> + <dt>{{jsxref("TypedArray.prototype.length", "Float64Array.prototype.length")}}</dt> + <dd>Returns the number of elements hold in the <code>Float64Array</code>. Fixed at construction time and thus <strong>read only.</strong></dd> +</dl> + +<h2 id="Instance_methods">Instance methods</h2> + +<dl> + <dt>{{jsxref("TypedArray.copyWithin", "Float64Array.prototype.copyWithin()")}}</dt> + <dd>Copies a sequence of array elements within the array. See also {{jsxref("Array.prototype.copyWithin()")}}.</dd> + <dt>{{jsxref("TypedArray.entries", "Float64Array.prototype.entries()")}}</dt> + <dd>Returns a new <code>Array Iterator</code> object that contains the key/value pairs for each index in the array. See also {{jsxref("Array.prototype.entries()")}}.</dd> + <dt>{{jsxref("TypedArray.every", "Float64Array.prototype.every()")}}</dt> + <dd>Tests whether all elements in the array pass the test provided by a function. See also {{jsxref("Array.prototype.every()")}}.</dd> + <dt>{{jsxref("TypedArray.fill", "Float64Array.prototype.fill()")}}</dt> + <dd>Fills all the elements of an array from a start index to an end index with a static value. See also {{jsxref("Array.prototype.fill()")}}.</dd> + <dt>{{jsxref("TypedArray.filter", "Float64Array.prototype.filter()")}}</dt> + <dd>Creates a new array with all of the elements of this array for which the provided filtering function returns true. See also {{jsxref("Array.prototype.filter()")}}.</dd> + <dt>{{jsxref("TypedArray.find", "Float64Array.prototype.find()")}}</dt> + <dd>Returns the found value in the array, if an element in the array satisfies the provided testing function or <code>undefined</code> if not found. See also {{jsxref("Array.prototype.find()")}}.</dd> + <dt>{{jsxref("TypedArray.findIndex", "Float64Array.prototype.findIndex()")}}</dt> + <dd>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 {{jsxref("Array.prototype.findIndex()")}}.</dd> + <dt>{{jsxref("TypedArray.forEach", "Float64Array.prototype.forEach()")}}</dt> + <dd>Calls a function for each element in the array. See also {{jsxref("Array.prototype.forEach()")}}.</dd> + <dt>{{jsxref("TypedArray.includes", "Float64Array.prototype.includes()")}}</dt> + <dd>Determines whether a typed array includes a certain element, returning <code>true</code> or <code>false</code> as appropriate. See also {{jsxref("Array.prototype.includes()")}}.</dd> + <dt>{{jsxref("TypedArray.indexOf", "Float64Array.prototype.indexOf()")}}</dt> + <dd>Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found. See also {{jsxref("Array.prototype.indexOf()")}}.</dd> + <dt>{{jsxref("TypedArray.join", "Float64Array.prototype.join()")}}</dt> + <dd>Joins all elements of an array into a string. See also {{jsxref("Array.prototype.join()")}}.</dd> + <dt>{{jsxref("TypedArray.keys", "Float64Array.prototype.keys()")}}</dt> + <dd>Returns a new <code>Array Iterator</code> that contains the keys for each index in the array. See also {{jsxref("Array.prototype.keys()")}}.</dd> + <dt>{{jsxref("TypedArray.lastIndexOf", "Float64Array.prototype.lastIndexOf()")}}</dt> + <dd>Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found. See also {{jsxref("Array.prototype.lastIndexOf()")}}.</dd> + <dt>{{jsxref("TypedArray.map", "Float64Array.prototype.map()")}}</dt> + <dd>Creates a new array with the results of calling a provided function on every element in this array. See also {{jsxref("Array.prototype.map()")}}.</dd> + <dt>{{jsxref("TypedArray.reduce", "Float64Array.prototype.reduce()")}}</dt> + <dd>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 {{jsxref("Array.prototype.reduce()")}}.</dd> + <dt>{{jsxref("TypedArray.reduceRight", "Float64Array.prototype.reduceRight()")}}</dt> + <dd>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 {{jsxref("Array.prototype.reduceRight()")}}.</dd> + <dt>{{jsxref("TypedArray.reverse", "Float64Array.prototype.reverse()")}}</dt> + <dd>Reverses the order of the elements of an array — the first becomes the last, and the last becomes the first. See also {{jsxref("Array.prototype.reverse()")}}.</dd> + <dt>{{jsxref("TypedArray.set", "Float64Array.prototype.set()")}}</dt> + <dd>Stores multiple values in the typed array, reading input values from a specified array.</dd> + <dt>{{jsxref("TypedArray.slice", "Float64Array.prototype.slice()")}}</dt> + <dd>Extracts a section of an array and returns a new array. See also {{jsxref("Array.prototype.slice()")}}.</dd> + <dt>{{jsxref("TypedArray.some", "Float64Array.prototype.some()")}}</dt> + <dd>Returns true if at least one element in this array satisfies the provided testing function. See also {{jsxref("Array.prototype.some()")}}.</dd> + <dt>{{jsxref("TypedArray.sort", "Float64Array.prototype.sort()")}}</dt> + <dd>Sorts the elements of an array in place and returns the array. See also {{jsxref("Array.prototype.sort()")}}.</dd> + <dt>{{jsxref("TypedArray.subarray", "Float64Array.prototype.subarray()")}}</dt> + <dd>Returns a new <code>Float64Array</code> from the given start and end element index.</dd> + <dt>{{jsxref("TypedArray.values", "Float64Array.prototype.values()")}}</dt> + <dd>Returns a new <code>Array Iterator</code> object that contains the values for each index in the array. See also {{jsxref("Array.prototype.values()")}}.</dd> + <dt>{{jsxref("TypedArray.toLocaleString", "Float64Array.prototype.toLocaleString()")}}</dt> + <dd>Returns a localized string representing the array and its elements. See also {{jsxref("Array.prototype.toLocaleString()")}}.</dd> + <dt>{{jsxref("TypedArray.toString", "Float64Array.prototype.toString()")}}</dt> + <dd>Returns a string representing the array and its elements. See also {{jsxref("Array.prototype.toString()")}}.</dd> + <dt>{{jsxref("TypedArray.@@iterator", "Float64Array.prototype[@@iterator]()")}}</dt> + <dd>Returns a new <code>Array Iterator</code> object that contains the values for each index in the array.</dd> +</dl> + +<h2 id="Examples">Examples</h2> + +<h3 id="Different_ways_to_create_a_Float64Array">Different ways to create a <code>Float64Array</code></h3> + +<pre class="brush: js notranslate">// From a length +var float64 = new Float64Array(2); +float64[0] = 42; +console.log(float64[0]); // 42 +console.log(float64.length); // 2 +console.log(float64.BYTES_PER_ELEMENT); // 8 + +// From an array +var arr = new Float64Array([21,31]); +console.log(arr[1]); // 31 + +// From another TypedArray +var x = new Float64Array([21, 31]); +var y = new Float64Array(x); +console.log(y[0]); // 21 + +// From an ArrayBuffer +var buffer = new ArrayBuffer(32); +var z = new Float64Array(buffer, 0, 4); + +// From an iterable +var iterable = function*(){ yield* [1,2,3]; }(); +var float64 = new Float64Array(iterable); +// Float64Array[1, 2, 3] +</pre> + +<h2 id="Specifications">Specifications</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specification</th> + </tr> + <tr> + <td>{{SpecName('ESDraft', '#table-49', 'TypedArray constructors')}}</td> + </tr> + </tbody> +</table> + +<h2 id="Browser_compatibility">Browser compatibility</h2> + + + +<p>{{Compat("javascript.builtins.Float64Array")}}</p> + +<h2 id="See_also">See also</h2> + +<ul> + <li><a href="/en-US/docs/Web/JavaScript/Typed_arrays" title="en/JavaScript typed arrays">JavaScript typed arrays</a></li> + <li>{{jsxref("ArrayBuffer")}}</li> + <li>{{jsxref("DataView")}}</li> +</ul> |