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# isnumeric --- check whether a value is numeric
function isnumeric(x, f)
{
switch (typeof(x)) {
case "strnum":
case "number":
return 1
case "string":
return (split(x, f, " ") == 1) && (typeof(f[1]) == "strnum")
default:
return 0
}
}
Please note that leading or trailing white space is disregarded in deciding
whether a value is numeric or not, so if it matters to you, you may want
to add an additional check for that.
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