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https://issues.apache.org/jira/browse/GROOVY-4018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Tekell updated GROOVY-4018:
---------------------------------
Description:
Similar to null and empty-string, have Groovy evaluate NaN as false rather than
true.
{noformat}
def result = a?.b?.calcX(...)
if (result) {
// now I have a valid non-null number
}
{noformat}
This is how JavaScript treats NaN and like other Groovy design choices, it just
makes sense.
Discussed in this thread
http://old.nabble.com/Shouldn't-the-Groovy-truth-value-of-NaN-be-false--tt27348256.html
That is, if NaN was false the following should work:
assert !(Double.NaN)
assert !((Double.NaN as Boolean) == true)
assert ((Double.NaN as Boolean) == false)
was:
Similar to null and empty-string, have Groovy evaluate NaN as false rather than
true.
def x = a?.b?.calcX(...)
if (x) {
// now I have a valid non-null number
}
This is how JavaScript treats NaN and like other Groovy design choices, it just
makes sense.
Discussed in this thread
http://old.nabble.com/Shouldn't-the-Groovy-truth-value-of-NaN-be-false--tt27348256.html
That is, if NaN was false the following should work:
assert !(Double.NaN)
assert !((Double.NaN as Boolean) == true)
assert ((Double.NaN as Boolean) == false)
> Make the Groovy truth value of NaN be false
> -------------------------------------------
>
> Key: GROOVY-4018
> URL: https://issues.apache.org/jira/browse/GROOVY-4018
> Project: Groovy
> Issue Type: Improvement
> Components: groovy-runtime
> Reporter: Steve Tekell
>
> Similar to null and empty-string, have Groovy evaluate NaN as false rather
> than true.
> {noformat}
> def result = a?.b?.calcX(...)
> if (result) {
> // now I have a valid non-null number
> }
> {noformat}
> This is how JavaScript treats NaN and like other Groovy design choices, it
> just makes sense.
> Discussed in this thread
> http://old.nabble.com/Shouldn't-the-Groovy-truth-value-of-NaN-be-false--tt27348256.html
> That is, if NaN was false the following should work:
> assert !(Double.NaN)
> assert !((Double.NaN as Boolean) == true)
> assert ((Double.NaN as Boolean) == false)
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