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March 17

Uncommon Javascript Knowledge 1

#1, !! Converts Object to boolean. If it was falsey (e.g. 0, null, undefined, etc.), it will be false, otherwise, true. !oObject  // inverted boolean !!oObject // non inverted boolean so true boolean representation So !! is not an operator, it's just the ! operator twice. #2, ?? JavaScript nullish coalescing operator.   It returns the right operand (rightExpression) if the left operand (leftExpression) is null or undefined. let...

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