deleting an object in array, based on object.attribute

[Josselin]

I have an array anArray = [ object_1, object_2, ...... object_n]

I would like to delete an object in it, if object.attribute_x = anInteger

what is the dryest way to do it vs a C-style loop on each item of the array ?

thanks fyh

joss

 

[Robert Klemme]

I have an array anArray = [ object_1, object_2, ...... object_n]

I would like to delete an object in it, if object.attribute_x = anInteger

what is the dryest way to do it vs a C-style loop on each item of the array ?

irb(main):001:0> %w{foo bar peter mountain}.delete_if {|s| s.length > 3}
=> ["foo", "bar"]

robert

 

[Josselin]

I have an array anArray = [ object_1, object_2, ...... object_n]

I would like to delete an object in it, if object.attribute_x = anInteger

what is the dryest way to do it vs a C-style loop on each item of the array ?

irb(main):001:0> %w{foo bar peter mountain}.delete_if {|s| s.length > 3}
=> ["foo", "bar"]

robert

thanks Robert.. missed the delete_if { block } in reading my doc !

 

[Peña, Botp]

From: Josselin [mailto:[email protected]]=20
# I have an array anArray =3D [ object_1, object_2, ...... object_n]
# I would like to delete an object in it, if=20
# object.attribute_x =3D anInteger

delete_if changes the array

irb(main):055:0> a=3D["a",1,"b",2,3,"c",4]
=3D> ["a", 1, "b", 2, 3, "c", 4]
irb(main):056:0> a.delete_if{|x| x.is_a? Integer}
=3D> ["a", "b", "c"]
irb(main):057:0> a
=3D> ["a", "b", "c"]

reject creates another array copy

irb(main):061:0> a.reject{|x| x.is_a? Integer}
=3D> ["a", "b", "c"]

select is like reject but w reverse logic

irb(main):066:0> a.select{|x| not x.is_a? Integer}
=3D> ["a", "b", "c"]


kind regards -botp