typescript double question mark

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Baptiste
07 Jan 2019
1//Similar to || but only returns the right-hand operand if the left-hand is null or undefined
20 ?? "other" // 0
3false ?? "other" // false
4null ?? "other" // "other"
5undefined ?? "other" // "other"
Cecil
15 Feb 2018
1A = A ?? B;
2//it is the same as
3if( null != A )
4    A = A;
5else
6    A = B;
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