Can anyone explain, the difference between
<div ng-show="!user.name">and<div ng-show="!!user.name">
I was wondering what
!!
does? in angularjs I googled it but didn't get relivent answer
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Uttam Ughareja
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It is a double negative. `true` evals to `true`; `!true` evals to `false`, `!!true` evals to `true`; `!!!true` evals to `false`; ....and you can keep going if you want. The main use is to take a truthy value and make it return a boolean true or false. – Igor Aug 24 '18 at 11:18
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It is a double logical not operator.
trueevals totrue!trueevals tofalse!!trueevals totrue!!!trueevals tofalse....and you can keep going if you want.
The main use of !! generally is to take a truthy value and have it result in a boolean true or false.
logical not operator
!Returns false if its single operand can be converted to true; otherwise, returns true
