Fix coerce() returning NaN for non-numeric digit-starting strings #15
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Strings like "3.7.1" or "1abc" start with a digit but aren't valid numbers. The coerce function was blindly returning Number(value), producing NaN. Now it checks isNaN before returning the numeric result, falling back to the original string.
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This PR:
coerce(): it was converting any digit-starting string toNumber(value), even when the result isNaN(e.g."3.7.1","1abc")isNaNguard so invalid conversions fall back to the original stringFor example:
parse(["3.7.1"])→{ _: ["3.7.1"] }(was{ _: [NaN] })parse(["1abc"])→{ _: ["1abc"] }(was{ _: [NaN] })parse(["--version", "3.7.1"])→{ version: "3.7.1" }(was{ version: NaN })"42"→42,".5"→0.5,"3.14"→3.14