let array = ["hello.txt","hello.zip","","hello.exe"];
...........
...........
Output : [".txt",".zip","null",".exe"];
Understand the problem and solve it...make your solution on comments..
let array = ["hello.txt","hello.zip","","hello.exe"];
...........
...........
Output : [".txt",".zip","null",".exe"];
Understand the problem and solve it...make your solution on comments..
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