‘lastIndexOf()’
return the last index at which a given element can be found in the array, or -1
if it is not present.
Syntax
arr.lastIndexOf(searchElement[,
fromIndex = arr.length - 1])
fromIndex
specifies the index at which to start searching backwards.
lastIndexOf.html
<!DOCTYPE html> <html> <head> <title>lastIndexOf example</title> </head> <body> <script type="text/javascript"> var arr = [2, 3, 5, 7, 2, 3, 2, 5]; document.write("index of first occurrence of element 2 " + arr.lastIndexOf(2) + "<br />"); document.write("index of occurrence of element 2 from index 5 " + arr.lastIndexOf(2, 5) + "<br />"); document.write("index of occurrence of element 2 from index 7 " + arr.lastIndexOf(2, 7) + "<br />"); </script> </body> </html>
Open above
page in browser, you can able to see following text.
index of
first occurrence of element 2 6
index of
occurrence of element 2 from index 5 4
index of
occurrence of element 2 from index 7 6
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