Learn Javascript Working With String Object First Last Characters overview
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[Using Looping] A simple program to read an email and validate against the format A(A/9/_)...(A/9/_)..A.com where A is ...
00:00:00 intro 00:00:28 .charAt() 00:01:34 .indexOf() 00:02:03 .lastIndexOf() 00:02:15 .length 00:02:40 .trim() 00:03:13 .
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