¿Cómo se comprueba si una matriz contiene una matriz Javascript?

How do you check if an array contains an array Javascript?

Summary

1. For primitive values, use the array. includes() method to check if an array contains a value.
2. For objects, use the isEqual() helper function to compare objects and array. some() method to check if the array contains the object.

var PlayerOne = [‘B’, ‘C’, ‘A’, ‘D’]; var PlayerTwo = [‘D’, ‘C’]; var result = PlayerTwo. every(function(val) { return PlayerOne. indexOf(val) >= 0; }); console. log(result);

Using Array. prototype. push() function To append values of an array into another array, you can call the push() method of the Array object.

Method 2:

1. Create an empty object and loop through first array.
2. Check if the elements from the first array exist in the object or not.
3. Loop through second array and check if elements in the second array exists on created object.
4. If element exist then return true else return false.

Check using the ” in” keyword var hasKey = “apple” in fruitPrices; The example above will store true in the variable valueForKey if the key “apple” exists in the

Find an object in an array by its values – Array.find.

Arrays are Objects. Arrays are a special type of objects. The typeof operator in JavaScript returns “object” for arrays. But, JavaScript arrays are best described as arrays. Arrays use numbers to access its “elements”. In this example, person[0] returns John:

An array in JavaScript® is a special type of variable that can hold multiple pieces of information or data values and is a storage place in memory. Those data values can be of the same type or of different types, but having different types of data in an array in JavaScript® is unusual.

The includes() method returns true if an array contains a specified element, otherwise false . includes() is case sensitive.

Using includes() Method: If array contains an object/element can be determined by using includes() method. This method returns true if the array contains the object/element else return false.

Algorithm to check if an array is a subset of another array

1. Use two loops.
2. Traverse the array using the outer loop.
3. Using the inner loop, check if the elements in array 2 are present in array 1.
4. If all the elements of array 2 are found in array 1, return true.
5. Else, return false.

In JavaScript, there are multiple ways to check if an array includes an item. You can always use the for loop or Array.indexOf () method, but ES6 has added plenty of more useful methods to search through an array and find what you are looking for with ease.

Problem is this only returns true when the arrays are identical and as you can see from example 1 I want it to return true even if they aren’t identical but at least contain the value using Jquerys .inArray function, but this only checks for one value in an array, not multiple.

We can use the Array.prototype.every () method (which was introduced in ES5) to check whether all elements in the array pass the test implemented by the provided function. We can use that with Array.prototype.includes () (which was introduced in ES7) like so:

In the example about, we use some (), which performs a test on each element in the a1 array. During that loop–which we conveniently have in a single line arrow function–we then check that the second array ( a2) contains the value ( val) from the first array by using the array object’s indexOf () method.