注意:indexOf 使用strict equality (===操作符基于同样的方法)进行判断 searchElement与数组中包含的元素之间的关系。 Array.prototype.lastIndexOf() 返回数组中最后一个(从右边数第一个)与指定值相等的元素的索引,如果找不到这样的元素,则返回 -1。 4.2.3 迭代方法 在下面的众多遍历方法中,有很多方法都需要指...
Example test.array(actual); Methods is(expected) Assertactualvalue equality by content and if possible, recursively. Also handles circular and self-referential objects. For most parts it asserts strict equality (===), but: Booleanobjects are compared to boolean literals. ...
**xDeepArrayEqual** recursively compares two nested arrays for deep equality. It does so by checking whether the two input arrays are deeply equal, meaning they have the same values in the same structure. Latest version: 0.0.1, last published: 2 years ag
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The InternMap and InternSet classes extend the native JavaScript Map and Set classes, respectively, allowing Dates and other non-primitive keys by bypassing the SameValueZero algorithm when determining key equality. d3.group, d3.rollup and d3.index use an InternMap rather than a native Map. ...
* for equality comparisons. The order and references of result values are * determined by the first array. * * **Note:** Unlike `pullAll`, this method returns a new array. * * @since 0.1.0 * @category Array * @param {Array} array The array to inspect. ...
SyntaxError: test for equality (==) mistyped as assignment (=)? SyntaxError: unterminated string literal TypeError: "x" has no properties TypeError: "x" is (not) "y" TypeError: "x" is not a constructor TypeError: "x" is not a function TypeError: "x" is not a non-null object TypeEr...
javascript 比较两个Uint8Array是否相等你不会错过任何东西，目前还没有一个类型化数组（或常规数组）的...
API:Creates a duplicate-free version of an array, usingSameValueZerofor equality comparisons, in which only the first occurence of each element is kept. ProvidingtrueforisSortedperforms a faster search algorithm for sorted arrays. If an iteratee function is provided it is invoked for each element...
Also Read: Difference Equality Strict Operator(===) in JavaScript 3. Using the logical NOT operator When we use the NOT operator(!) along with length property expression, then it will return true if the array is empty, because 0 is also treated as false, and negation of false is true....