Array.prototype.indexOf() MDN Web Docs
How to get the index of the largest value in an array
This is for a Java script course that Im taking... I need to create a simple user-login script. When the page loads a prompt pops up asking for the user name. If the correct username is entered, how to keep a girl interested on the phone Definition and Usage. The lastIndexOf() method searches the array for the specified item, and returns its position. The search will start at the specified position, or at the end if no start position is specified, and end the search at the beginning of the array.
How long can it take?
- 12/07/2010 · If you reduce the length property of an existing array, members with indexes greater than or equal to the new length get discarded (this turns out to be the only way to remove indexes from an array – you can delete an element but this will only delete the value and leave the index in place – i.e. your array becomes “sparse” = it gets holes in it)
- In real life arrays of objects is a common thing, so the find method is very useful. Note that in the example we provide to find the function item => item.id == 1 with one argument.