The forEach() method in JavaScript calls a function for every element in the array and this method will not execute for empty elements. In the output, we can see that the elements in the array which exist are pushed into a new array. Then we have a while loop and checked whether the element exists or not and pushed them into a new array.ĭocument.write("Existing array : ", array) Then we created an empty array to push the values which are going to satisfy the condition in the loop. We have an array with some empty indices involved in it. Example: Using a While LoopĪnother way to achieve the above-desired task is by using a while loop. In the output, we can see that the filter() method filtered all the empty indices(falsy values) and returned all the truthy values. Removing all the empty indices from arrayĬonst array = ĭocument.getElementById("para").innerHTML = res Now it will filter all the false values(empty indices) and return a new array containing truthy items in the array. for each iteration of the function in the array, it will return the current item. We have called the filter() method and passed a function into it. We have used filter() method to remove empty indices. In the example below, we have an array with empty indices. Will return an empty array if no elements passed the condition. This filter() method will return a new array containing the elements which satisfied the condition in function. The Arr parameter will be the array of the current element. Index parameter, this will be the index of the current element. The function() parameter is a function to iterate for every array element.ĬurrentValue parameter, this will be the value of the current element. Syntaxįollowing is the syntax of filter() method in JavaScript, array.filter(function(currentValue index, arr)) This method will not execute for empty elements and also will not change or modify the existing array. The filter() method in JavaScript will create a new array with the elements that satisfied the condition given by the function. We can achieve the above task by using several methods, let’s look into the approaches to solve it. Array = Īs we can see in the output, the indices which are empty in the array got removed. Now we need to exclude them and return the elements which are having only truthy values. Let’s look into the input output scenarios –Ĭonsider there is an array with some empty indices. Given there is an array with some empty indices and need to remove those empty indices from array.
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