The result that is stored in the variable will be hence false. Here the array does not consist of a cat. The third statement helps us in displaying the result. Once this result is stored in the mentioned variable you can display the result by making use of document.write(). The second statement is storing the result of includes() in the checkArray variable. By making use of the includes() method we are checking if the array has ‘cat’ in the array. Here we have an array created with the name ‘animals’. Var animals = Įxplanation: The above code snippet makes use of a string array. The result which is displayed is hence true. If you check the above screenshot the result of the above code snippet is true as the includes() method finds 2 in the array. The third statement work for this purpose. True will signify that the mentioned element is present in the array and false will signify that it is not present in the array.
Post find the result we can print it and get it if it is true or false. The second statement here serves this purpose. Once this array is created it makes use of the includes() method to check if 2 is there in the mentioned array. Examples to Implement JavaScript Array includes()īelow are the examples mentioned: Example #1 – Numeric arrayĮxplanation: The above script first creates an array. If the element is found then it will have to return true or the function will return false. It will look for the number or element from the index position mentioned and traverse the array until the end. If the optional parameter with start position was mentioned then instead of traversing the entire array the method includes() would have started from that position. It will return the value true and this will be stored in the user-defined variable checkInclude. It traverses through the array and looks for the integer 2 in it. That means it will directly start looking for 2 in the array A. It will check if the array contains for the integer 2. This variable is used to store the result of the include() method. See the tutorial on JavaScript ES6 Features to learn more about arrow function notation.Here in this statement a checkInclude variable is used. The some() method is supported in all major browsers, such as Chrome, Firefox, IE (9 and above), etc. Likewise, two distinct arrays are not equal even if they have the same values in the same order. Because, two distinct objects are not equal even if they look the same (i.e.
Var persons = [) it will not work (always return -1).
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