Tests of characteristics associated with PUIDs are made in a form or mathematical logic known as a Boolean expression (after George Boole who invented it). A Boolean expression combines ...

A prefix operator is an operator that is applied to the variable, constant, function, or parenthetic expression that immediately follows it. The plus sign (+) and minus sign (-) can be used as prefix ...

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Google has quietly removed the Boolean + operator from its search options–and replaced it with expanded quotation mark functionality. For those who don’t use Boolean search operators, this isn’t a big ...