regex not something

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1// You can use (?!...) like the example below
2
3let names = ['JOAO', 'JOHN', 'JOANA', 'JOABE'];
4for(let n of names)
5{
6  	/(JO)(?!A)/.test(n);
7	// only true on 'JOHN'
8}

1^((?!hede).)*$
2

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