Can you identify the distinction between these two lines of code?
if (typeof errorMessage !== undefined)
{}
and
if (typeof (errorMessage) !== undefined)
{}
Can you identify the distinction between these two lines of code?
if (typeof errorMessage !== undefined)
{}
and
if (typeof (errorMessage) !== undefined)
{}
One of them contains unnecessary parentheses that serve no purpose.
The distinction between typeof x and typeof (x) is akin to the distinction between 2 + 2 and (2) + (2).
As a side note, it's important to remember that the typeof operator returns a string, so comparisons should be made with "undefined" instead of just undefined.
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