count() - Count all elements in an array, or something in an object; array_unique() ... function assc_array_count_values( $array, $key ) { foreach( $array as $row ) The indexOf function returns the first index at which a given element can be found in the array, or -1 if it is not present. ... Returns true if every element in this array satisfies the provided testing function. Originally published in the A Drip of JavaScript newsletter. ... Sanfoundry is No. Any number. During work, I was given this task: to group elements with similar properties in the array. Array Elements Can Be Objects. Hi Guys, How can I count form array inputs like "input_name[]" using javascript? Counts all elements in an array, or something in an object. Removing Elements from JavaScript Arrays. This is a number one higher than the highest element defined in an array. ... which starts to count from the end of the array when it sees a negative index. 3: Count elements in an array. Finding Array Elements with Array#indexOf. Well the question is on the subjkect line, i need to know how many elements are there in the array, is there a function? This tutorial shows you how to reference array elements in JavaScript. JavaScript arrays begin at 0, so the first element will always be inside [0]. The length property of an object which is an instance of type Array sets or returns the number of elements in that array. For objects, if you have SPL installed, you can hook into count() by implementing interface Countable ... Want to improve your JavaScript skills? ... i