GR8Conf EU Registration ends soon!
Hi, Registrations for GR8Conf EU ends one week from now, Monday May 23rd. You do not want to miss this year's event! Here you can learn all about Groovy, Grails and Gradle from the project founders and core developers! From the Groovy core team you can meet: Guillaume Laforge, Cedric Champeau and Jochen Theodorou. From the Grails core team you can meet: Jeff Brown and Graeme Rocher. Cedric also represents Gradle. The opening keynote is delivered by Ken Kousen. One University day with workshops, Two conference days, Three conference tracks, 24 speakers from all over the world. Not to mention our home brewed beer for Meet & Greet. For more information, please visit gr8conf.eu now! Best regards, Søren Berg Glasius GR8Conf Europe organizing team GR8Conf ApS Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark --- GR8Conf - Dedicated to the Groovy Ecosystem
Re: re-using a comparison closure
Hi
You can define it in a class as a static closure
class Sorters {
static compareVersions = { a,b ->
return getVersion(a).toInteger() <=> getVersion(b).toInteger()
}
}
and use it like:
list.sort(Sorters.compareVersions)
Best regards,
Søren Berg Glasius
GR8Conf Europe organizing team
GR8Conf ApS
Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius
Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark
Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark
--- GR8Conf - Dedicated to the Groovy Ecosystem
From: Guy Matz
Reply: users@groovy.apache.org
Date: May 16, 2016 at 17:42:21
To: users@groovy.apache.org
Subject: Re: re-using a comparison closure
Thanks! Now, I have a number of methods that need access to that closure . . .
Can I make the closure global? Is there a better way?
Thanks again,
Guy
On Mon, May 16, 2016 at 11:30 AM, Søren Berg Glasius (GR8Conf EU)
wrote:
Hi Guy
Just assign the variable
def comapreVersions = { a,b ->
return getVersion(a).toInteger() <=> getVersion(b).toInteger()
}
and then use it in your sort:
list.sort(compareVersions)
Best regards,
Søren Berg Glasius
GR8Conf Europe organizing team
GR8Conf ApS
Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius
Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark
Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark
--- GR8Conf - Dedicated to the Groovy Ecosystem
From: Guy Matz
Reply: users@groovy.apache.org
Date: May 16, 2016 at 17:28:34
To: users@groovy.apache.org
Subject: re-using a comparison closure
Hi!
I have to sort a list of strings based on a number within the string . . . I
am able to sort using something like:
list.sort( { a,b -> getVersion(a) <=> getVersion(b)})
I need to use this in a bunch of places in my code and was hoping to replace it
with a method, like:
list.sort( compareVersions)
with compareVersions:
def compareVersions(a, b) {
return getVersion(a).toInteger() <=> getVersion(b).toInteger()
}
putting the method (compoareVersions) into the sort as a param doesn't work.
Anyone know what I'm missing?
Thanks!!
Guy
Re: re-using a comparison closure
Hi Guy
Just assign the variable
def comapreVersions = { a,b ->
return getVersion(a).toInteger() <=> getVersion(b).toInteger()
}
and then use it in your sort:
list.sort(compareVersions)
Best regards,
Søren Berg Glasius
GR8Conf Europe organizing team
GR8Conf ApS
Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius
Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark
Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark
--- GR8Conf - Dedicated to the Groovy Ecosystem
From: Guy Matz
Reply: users@groovy.apache.org
Date: May 16, 2016 at 17:28:34
To: users@groovy.apache.org
Subject: re-using a comparison closure
Hi!
I have to sort a list of strings based on a number within the string . . . I
am able to sort using something like:
list.sort( { a,b -> getVersion(a) <=> getVersion(b)})
I need to use this in a bunch of places in my code and was hoping to replace it
with a method, like:
list.sort( compareVersions)
with compareVersions:
def compareVersions(a, b) {
return getVersion(a).toInteger() <=> getVersion(b).toInteger()
}
putting the method (compoareVersions) into the sort as a param doesn't work.
Anyone know what I'm missing?
Thanks!!
Guy
Re: Groovy Running Slower With More Memory
Hi Daniel, Without knowing for sure, I would think that setting the minimum heap size to 20G would take some time to allocate. What about just setting the maximum heap size, and let the JVM handle the minimum size, or start lower, like 2G. Best regards, Søren Berg Glasius GR8Conf Europe organizing team GR8Conf ApS Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark --- GR8Conf - Dedicated to the Groovy Ecosystem From: Daniel Price Reply: users@groovy.apache.org Date: May 9, 2016 at 18:28:38 To: users@groovy.apache.org Subject: Groovy Running Slower With More Memory Good Afternoon. I've been running some Groovy 2.4.2 scripts on a Windows 7 64-bit PC with 16GB of RAM. My scripts are memory intensive SQL Server DB manipulators, and I have modified startGroovy.bat to: %JAVA_OPTS% -Xms8192M -Xmx8192M I recently gained access to a new server running Windows Server 2012 that has 32GB RAM and lots of flash disk, so I thought giving Groovy more RAM might allow the scripts to run faster. So I installed Groovy on the server and modified startGroovy.bat to: %JAVA_OPTS% -Xms20480M -Xmx20480M But the new server runs my scripts about twice as slow as my PC. This is true even with the exact same RAM settings in startGroovy.bat. I don't know if I should expect to see a large decrease in run time based on additional RAM, but an increase seems odd to me. Could this be due to OS differences? Thanks!
Re: aliasing methods
Hi, Can you come with some specific code examples? Best regards, Søren Berg Glasius GR8Conf Europe organizing team GR8Conf ApS Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark --- GR8Conf - Dedicated to the Groovy Ecosystem From: frenchy48 Reply: users@groovy.apache.org Date: April 13, 2016 at 10:04:28 To: us...@groovy.incubator.apache.org Subject: aliasing methods Hello all I have a resource file that describes alias names for method (something with entries like: "org.smurf.MyClass#myMethod=otherName") now an initialisation code will read this resource to alias "myMethod" to "otherName" there are numerous problems: - when doing this aliasing I do not have instances (just the class) - there may be methods that are overloaded - and methods with arguments or no argument code such as: is not completely ok (if it is null I won't make the difference between a no-arg method and a method with just one arg which happens to be null) is there a more elegant expression to do that? thanks - member of Grumpy Old Programmers -- View this message in context: http://groovy.329449.n5.nabble.com/aliasing-methods-tp5732316.html Sent from the Groovy Users mailing list archive at Nabble.com.
Re: Check if List is of specific size and elements of specific type
@dinko yeah, that's why I choose to do my example with listVariable*.getClass() Best regards, Søren Berg Glasius GR8Conf Europe organizing team GR8Conf ApS Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark --- GR8Conf - Dedicated to the Groovy Ecosystem From: Dinko Srkoč Reply: users@groovy.apache.org Date: March 29, 2016 at 14:04:50 To: users@groovy.apache.org Subject: Re: Check if List is of specific size and elements of specific type On 29 March 2016 at 12:29, Marcos Carceles wrote: > Would this work? > > listVariable*.class == [Integer, Integer] It would in this particular example, but this may be dangerous for some other cases. Try e.g. this: [1, [:], [class: 1]]*.class Cheers, Dinko > > On 29 March 2016 at 12:25, Maarten Boekhold wrote: >> >> Hi, >> >> Is there a quick and easy way to do something like: >> >> assert listVariable == [int, int] >> >> eg, the list is of size 2 and each element is an int? >> >> Maarten > >
Re: Check if List is of specific size and elements of specific type
Hi Maarten, You could be close with this. def listVariable = [1,2] assert listVariable*.getClass() == [int, int] but your assert will have to be assert listVariable*.getClass() == [Integer, Integer] since ints are actually the object type Integer Best regards, Søren Berg Glasius GR8Conf Europe organizing team GR8Conf ApS Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark --- GR8Conf - Dedicated to the Groovy Ecosystem From: Maarten Boekhold Reply: users@groovy.apache.org Date: March 29, 2016 at 12:25:42 To: us...@groovy.incubator.apache.org Subject: Check if List is of specific size and elements of specific type Hi, Is there a quick and easy way to do something like: assert listVariable == [int, int] eg, the list is of size 2 and each element is an int? Maarten
Re: not sure about Collection.intersect
And by the way,
the easy way to implement equals and haschode is this:
import groovy.transform.EqualsAndHashCode
@EqualsAndHashCode
class TestClass {
String name
}
Best regards,
Søren Berg Glasius
GR8Conf Europe organizing team
GR8Conf ApS
Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius
Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark
Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark
--- GR8Conf - Dedicated to the Groovy Ecosystem
From: Edinson E. Padrón Urdaneta
Reply: users@groovy.apache.org
Date: February 8, 2016 at 15:29:00
To: users@groovy.apache.org
Subject: Re: not sure about Collection.intersect
I have to look at the implementation of the `intersect` method to be sure but
does your TestClass class overwrite `hashcode` and `equal`? There should be a
way to compare the instances of said class.
Re: not sure about Collection.intersect
Hi Paul,
c1 contains one instance of TestClass, c2 contains another. Those two are not
equals, because they probably do not implement the equals method, and thus
comparison is done between object references in memory, and they are different,
being two different objects.
if you equals was implemented to compare the name of TestClass I'm pretty sure
it would work.
Best regards,
Søren Berg Glasius
GR8Conf Europe organizing team
GR8Conf ApS
Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius
Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark
Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark
--- GR8Conf - Dedicated to the Groovy Ecosystem
From: Strachan, Paul
Reply: users@groovy.apache.org
Date: February 8, 2016 at 15:12:06
To: users@groovy.apache.org
Subject: not sure about Collection.intersect
Groovy 2.4.4 / 2.4.5
Hi – I’d like to get a list of objects from collection A that exist in
collection B using intersect() but I’m getting no results:
def c1 = []// as Set
def c2 = []// as Set
c1 << new TestClass(name: 'mike')
c2 << new TestClass(name: 'mike')
println c1.contains(c2[0])
assert c1.intersect(c2).size() == 1
Output:
true
Assertion failed:
assert c1.intersect(c2).size() == 1
| | | | |
| [] | 0 false
| [sample.TestClass@57]
[sample.TestClass@57]
TestClass.groovy
package sample
import groovy.transform.EqualsAndHashCode
@EqualsAndHashCode(includes = 'name')
class TestClass {
String name
}
Is intersect only for simple types?
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GR8Conf EU + Gradle miniSummit
GR8Conf Europe is happy to announce, that this years conference will feature an additional track, with focus on Gradle. We call it the "Gradle miniSummit". The conference takes place in beautiful Copenhagen, Denmark, from June 1st through 3rd, where the first day is a University day, with longer workshops, and the 2nd and 3rd are regular conference days with talks from the entire Groovy ecosystem. You can read more about the conference on: http://gr8conf.eu Note to speakers: The GR8Conf EU + Gradle miniSummit call for paper is open. Please submit your talks at http://cfp.gr8conf.org Best regards, Søren Berg Glasius GR8Conf co-founder and organizer. GR8Conf ApS Mobile: +45 40 44 91 88, Web: www.gr8conf.eu, Skype: sbglasius Company Address: Buchwaldsgade 50, 5000 Odense C, Denmark Personal Address: Hedevej 1, Gl. Rye, 8680 Ry, Denmark --- GR8Conf - Dedicated to the Groovy Ecosystem
