<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>One JavaScript instance per day - recursively implement inverting array string</title> <script> var func = function(x,indx,str){ return indx == 0 ? str : func(x,--indx,(str +=" " + x[indx]));; } var arr = new Array("apple","banna","orange","apple2","apple3"); var arr1 = arr.slice(0) var arr3 = func(arr1,arr1.length,""); var arr2 = arr.slice(0).reverse(); console.log(arr2); console.log(arr); console.log(arr3); </script> </head> <body> <div id = "date"> </div> </body> </html>