How to avoid throwing an exceptions for a built-in function?

[k-five via Digitalmars-d-learn]

On Thursday, 11 May 2017 at 19:59:55 UTC, Jordan Wilson wrote:
> On Thursday, 11 May 2017 at 18:07:47 UTC, H. S. Teoh wrote:
>> On Thu, May 11, 2017 at 05:55:03PM +0000, k-five via 
>> Digitalmars-d-learn wrote:
>>> On Thursday, 11 May 2017 at 17:18:37 UTC, crimaniak wrote:
>>> > On Wednesday, 10 May 2017 at 12:40:41 UTC, k-five wrote:
>>> ---------------------------------------------------------
>
> This reason is why I sometimes use isNumeric if I have heaps of 
> strings I need to convert,  to reduce exceptions. So something 
> like:
> int index = (str.isNumeric) ? to!int(str).ifThrown(0) : 0;
>
> Jordan
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Interesting! I was worried about performance and for that I did 
not want to use try-catch.
So (isNumberic) is a good solution.
http://dlang.org/phobos/std_traits.html#isNumeric