#JS #Smart coding

What is Smart coding?

Smart coding is coding the logic in precise, consice and readable at the sametime maintainable manner.

I like to stree the above meaning in all the upcoming post under this series (Yes, you can expect more coming up) ^_^.

Selector Operator( || )

Yes, I like calling it selector operator as per its usuage.

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function greet(name) {
    name = name || 'guest';
    console.log( `Hello ${name}` );
}

greet('Ashkeys'); // Hello Ashkeys

We can achieve the same using the following approach too.

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function greet(name = 'guest') {
    console.log( `Hello ${name}` );
}

greet('Ashkeys'); // Hello Ashkeys

The problem with the default argument value approach is that it will fail for empty string or null value.

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greet(null); // Hello null
greet(''); // Hello

So, prefer the selector operator over the default argument value assignment.

Tip: We can also call a function or evaluate an expression to determine the default value like name = name || determineDefaultName(); \O/

#JS #Smart coding