5/31/2023 0 Comments Findindex javascript![]() Similar function being passed to find(0 but this time we have found the actual number. create the function to check if the item is oddįunction isOdd(i) //return the number this time ![]() findIndex but iterates the array in reverse, returning the index closest to the. > FIND INDEX OF A FRUIT WITH FINDINDEX()įirstly we will find the index of a fruit inside a fruit array using arrow functions:Ĭonst fruits = // find the index of the "blueberries"Ĭonst index = fruits.findIndex(fruit => fruit = "blueberries") Ĭonsole.log(fruits) // blueberriesĪs a use case this is good when we want to find the first item that matches our condition when it exists in the array. Otherwise, it returns -1, indicating no element passed the test.Īlso this is another example to find the odd element inside an array: Underscore is a JavaScript library that provides a whole mess of useful. The lastIndexOf () method returns -1 if the value is not found. The lastIndexOf () method returns the index from the beginning (position 0). The lastIndexOf () method searches the string from the end to the beginning. 1.With findIndex() method we return the index of the first element in the array that satisfies the provided testing function. The lastIndexOf () method returns the index (position) of the last occurrence of a specified value in a string.
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