If you use jquery, you can use $.inArray instead of indexOf , which is cross browser compatible. ... Make sure index!==(-1) , i.e. item exists in ... ... <看更多>
Deleting elements using JavaScript Array's splice() method ... The position specifies the position of the first item to delete and the num argument determines the ... ... <看更多>
My preferred method of removing duplicates from an array is to use a Set . By definition, a set can only contain unique values, so it is the ... ... <看更多>