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For example, something like this:
var value = someArray.indexOf(3) !== -1 ? someArray.indexOf(3) : 0 Is there a better way to write that? Again, I am not seeking an answer to the exact question above, just an example of when you might have repeated operands in ternary operator expressions...
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The conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark ( ? ), then an expression to execute if the condition is truthy followed by a colon ( : ), and finally the expression to execute if the condition is falsy.
The alternative to the ternary operation is to use the && (AND) operation. Because the AND operator will short-circuit if the left-operand is falsey, it acts identically to the first part of the ternary operator.
Here's a simple decision-making example using if and else: int a = 10, b = 20, c; if (a < b) { c = a; } else { c = b; } printf("%d", c); This example takes more than 10 lines, but that isn't necessary. You can write the above program in just 3 lines of code using a ternary operator.
Personally I find the best way to do this is still the good old if statement:
var value = someArray.indexOf(3); if (value === -1) { value = 0; } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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