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From Rathinavelu <rathinav...@gmail.com>
Subject RE: Re: Strategy for optionally excluding a named method parameter?
Date Sun, 26 Apr 2020 01:23:32 GMT
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class=WordSection1><p class=MsoNormal><b>Both named and varag<o:p></o:p></b></p><p
class=MsoNormal><o:p>&nbsp;</o:p></p><p class=MsoNormal>def
f(Object[] args){ println args.one</p><p class=MsoNormal>print args.two }</p><p
class=MsoNormal>f(one: &quot;string&quot;,two:false)</p><p class=MsoNormal>f(one:&quot;string&quot;,
two:true)</p><p class=MsoNormal>f(two:false)</p><p class=MsoNormal>f(two:true)</p><p
class=MsoNormal>f(two: 1==2)</p><p class=MsoNormal>f(two: 1==1)</p><p
class=MsoNormal>f(two: 1==2)</p><p class=MsoNormal><o:p>&nbsp;</o:p></p><p
class=MsoNormal>[string]</p><p class=MsoNormal>[false][string]</p><p
class=MsoNormal>[true][null]</p><p class=MsoNormal>[false][null]</p><p
class=MsoNormal>[true][null]</p><p class=MsoNormal>[false][null]</p><p
class=MsoNormal>[true][null]</p><p class=MsoNormal>[false]</p><p class=MsoNormal><o:p>&nbsp;</o:p></p><p
class=MsoNormal>Please as a work around keep the <b>boolean</b> as the last
parameter. Since <b>map</b> is a subclass of  <b>Object,</b> the
function polymorphically accepts <b>map object</b> . But why Boolean be the last
to work? Sorry, Sir! I am into groovy only from last week! A long way to go!</p><p
class=MsoNormal>The reason for always ‘false’ in the middle perhaps  is “invisible
input”. Last output has no [null]</p><p class=MsoNormal>T.Rathinavelu</p><p
class=MsoNormal><o:p>&nbsp;</o:p></p><p class=MsoNormal>Sent
from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows
10</p><p class=MsoNormal><o:p>&nbsp;</o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid
#E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From:
</b><a href="mailto:mgbiz@arscreat.com">MG</a><br><b>Sent: </b>Sunday,
April 26, 2020 5:00 AM<br><b>To: </b><a href="mailto:users@groovy.apache.org">users@groovy.apache.org</a>;
<a href="mailto:davidmichaelkarr@gmail.com">David Karr</a><br><b>Subject:
</b>Re: Strategy for optionally excluding a named method parameter?</p></div><p
class=MsoNormal><o:p>&nbsp;</o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hi
David,<br><br>since, as was mentioned, named parameters are implemented as a map
underneath in Groovy, you should be able to remove the map entry of the parameter you do not
want to pass, though I did not try this myself...<br><br>Cheers,<br>mg<br><br><o:p></o:p></p><div><p
class=MsoNormal>On 25/04/2020 20:57, David Karr wrote:<o:p></o:p></p></div><blockquote
style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal><o:p>&nbsp;</o:p></p></div><p
class=MsoNormal><o:p>&nbsp;</o:p></p><div><div><p
class=MsoNormal>On Sat, Apr 25, 2020 at 2:00 AM Rathinavelu &lt;<a href="mailto:rathinavelu@gmail.com">rathinavelu@gmail.com</a>&gt;
wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid
#CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Named parameters
are not available in Groovy, say, as in Python., though they say it is. Groovy has only mapped
parameters. The earlier mail works for a single ‘named’ parameter; if there are more parameters
Groovy does not work as ‘expected’; it treats them only as positional parameters.</p><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Kindly mail
me an use-case.</p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>T.Rathinavelu</p></div></div></blockquote><div><p
class=MsoNormal><o:p>&nbsp;</o:p></p></div><div><p
class=MsoNormal>The code sample looks something like this:<o:p></o:p></p></div><div><p
class=MsoNormal><o:p>&nbsp;</o:p></p></div><div><p
class=MsoNormal>&nbsp;&nbsp;&nbsp; functionName param1: value,<o:p></o:p></p></div><div><p
class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
param2: value,<o:p></o:p></p></div><div><p class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
param3: value,<o:p></o:p></p></div><div><p class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
param4: value,<o:p></o:p></p></div><div><p class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
...<o:p></o:p></p></div><div><p class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
param25: value<o:p></o:p></p></div><div><p class=MsoNormal><o:p>&nbsp;</o:p></p></div><div><p
class=MsoNormal>For instance, we need to make either the previous call or the following:<o:p></o:p></p></div><div><p
class=MsoNormal><o:p>&nbsp;</o:p></p></div><div><div><p
class=MsoNormal>&nbsp;&nbsp;&nbsp; functionName param1: value,<o:p></o:p></p></div><div><p
class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
param2: value,<o:p></o:p></p></div><div><p class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
param3: value,<o:p></o:p></p></div><p class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
... <o:p></o:p></p><div><p class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
param25: value<o:p></o:p></p></div><div><p class=MsoNormal><o:p>&nbsp;</o:p></p></div><div><p
class=MsoNormal>Where the &quot;param4&quot; key and value are not provided.&nbsp;
Presently, we have an &quot;if&quot; checking for a condition, followed by the &quot;true&quot;
block with the first version of the function call with 25 parameters, followed by the &quot;else&quot;
and the &quot;false&quot; block with the second version, which has 24 parameters,
all the same values as in the first block, except for the one key and value not provided in
the second version.<o:p></o:p></p></div><div><p class=MsoNormal><o:p>&nbsp;</o:p></p></div></div><blockquote
style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Sent from <a
href="https://go.microsoft.com/fwlink/?LinkId=550986" target="_blank">Mail</a> for
Windows 10</p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p><div
style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;border-color:currentcolor&#13;&#10;
                 currentcolor'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>From:
</b><a href="mailto:davidmichaelkarr@gmail.com" target="_blank">David Karr</a><br><b>Sent:
</b>Saturday, April 25, 2020 1:48 AM<br><b>To: </b><a href="mailto:users@groovy.apache.org"
target="_blank">users@groovy.apache.org</a><br><b>Subject: </b>Strategy
for optionally excluding a named method parameter?</p></div><p class=MsoNormal
style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p><div><div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Lately my only
Groovy work is scripted pipelines in Jenkins, version 2.89.4 .</p></div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p></div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I'm working
with an api that is somewhat dumb in one respect.&nbsp; The method we call takes ~25 parameters.&nbsp;
We send them as named parameters. One of the parameters is of boolean type.&nbsp; What
we've discovered from testing is that if we send a value as either &quot;true&quot;
or &quot;false&quot;, it acts as if we sent &quot;true&quot;.&nbsp; If
we construct the call without that parameter entirely, it acts as if we sent &quot;false&quot;.
I tried making it send null, but that just causes it to fail at runtime.&nbsp; We presently
have an &quot;if&quot; for that one flag, with two calls to the method, one taking
25 parameters, the other taking 24.&nbsp; It is really obnoxious.</p></div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p></div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Obviously, the
proper fix is to change their api so that it works correctly.&nbsp; The reality is, that's
not going to happen any time soon in geological terms.</p></div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p></div><div><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Is there a concise
groovy syntax we could use that would optionally include or exclude a single parameter to
the method?</p></div></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p><p
class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p></div></div></blockquote></div></div></blockquote><p
class=MsoNormal><o:p>&nbsp;</o:p></p><p class=MsoNormal><o:p>&nbsp;</o:p></p></div></body></html>

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