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How can I flip the value of a boolean variable in javascript, without having to include the variable name twice? So
foobarthings[foothing][barthing] = !foobarthings[foothing][barthing]; without writing foobarthings[foothing][barthing] twice.
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To toggle a boolean, use the strict inequality (! ==) operator to compare the boolean to true , e.g. bool !== true . The comparison will return false if the boolean value is equal to true and vice versa, effectively toggling the boolean.
The operator. not_() function takes a boolean value as its argument and returns the opposite of that value.
Method 1: Using the logical NOT operator: The logical NOT operator in Boolean algebra is used to negate an expression or value. Using this operator on a true value would return false and using it on a false value would return true. This property can be used to toggle a boolean value.
To declare a Boolean variable, we use the keyword bool. To initialize or assign a true or false value to a Boolean variable, we use the keywords true and false. Boolean values are not actually stored in Boolean variables as the words “true” or “false”.
There is no shorter way than what you currently have.
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You can do this:
foo ^= 1 But this really switches foo between 0 and 1, not true and false.
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