CODEWITHSUNDEEP
sortingcollectionsgroovy
zade
zade

Reputation: 165

can we use two criterias in sort

I have been using the following code for sorting a domain's results

vpisort.sort{it.price}

I was wondering If i could use something like

vpisort.sort{it.price-it?.discount}

Upvotes: 2

Views: 111

Answers (2)

rdmueller
rdmueller

Reputation: 11012

hm. This is not a grails, but a groovy question. With this in mind, the solution is simple:

open the groovy console and give your line a try. Or check out these examples:

http://groovy.codehaus.org/JN1015-Collections

there is also another question like this one on SO:

Groovy list.sort by first, second then third elements

hope that helps!

Update: If you want to have a default sort order for your domain class, take a look at this GORM feature: http://grails.org/doc/latest/guide/single.html#ormdsl (5.5.3 Default Sort Order)

Upvotes: 1

Tomasz Kalkosiński
Tomasz Kalkosiński

Reputation: 3723

I've found this post. You can try using this in your case:

vpisort.sort { a, b -> a.price <=> b.price ?: a?.discount <=> b?.discount }

It comapres price first and then, only if a and b are equal by price and result is zero, using Elvis operator it compares a and by by discount.

Upvotes: 5

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