C# Serial Port Communication Example Code Is Equivalent

This behavior allows a default value to be defined for cases where a more specific value is not available.

For example the following will return the default title if either the page object is null or page is not null but its Title property is.

It is functionally and syntactically equivalent to its C counterpart, above.

The inclusion of false makes it slightly different to traditional Elvis operators.

Representation of computations that may or may not return a meaningful result is represented by the generic Maybe type, defined in the standard library 12 as.

The Haskell equivalent is a way of extracting a value from a Maybe by supplying a default value.

It evalutes its left-hand operand and, if the result value is not nullish ( null or undefined ), takes that value as its result; otherwise, it evaluates the right-hand operand and takes the resulting value as its result.

But where looks specifically for null or undefined, the operator looks for any falsy value: null, undefined,, 0, NaN, and of course, false.

On the basis of the evaluation, the expression returns either valueifnull when possiblynullvalue is null, or possiblynullvalue otherwise.

In the absence of side-effects this is similar to the way ternary operators (: statements) work in languages that support them.

C# Serial Port Communication Example Code Is Equivalent

The above Perl code is equivalent to the use of the ternary operator below.

Thus they behave differently on values that are false but defined, such as 0 or (a zero-length string).

This checks strictly for NULL or a non-existent variablearray indexproperty.

In this respect, it acts similarly to PHPs isset() pseudo-function.

For most cases, this will serve for the very same purpose of Cs null-coalescing operator, but keep in mind.

It is used to provide a default when unwrapping an optional type.

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