newbie to ruby, search an array

[Chris Ashton]

hi, im fairly new to ruby and cud do with some help

is there an easy way to search an array to see if it contains a desired
value

thanks

e.g. if @joe contains 'bloggs' return true and array location

thanks

 

[Hoesel, Daniël van]

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LWZvcnVtLmNvbS8uDQoNCg==

 

[Mateusz Tybura]

hi, im fairly new to ruby and cud do with some help

is there an easy way to search an array to see if it contains a desired
value

thanks

e.g. if @joe contains 'bloggs' return true and array location

thanks

Try this:

tab = ["frogs","mugs","bloggs"]
tab.index "bloggs" #=> returns index or nil if not found

 

[Chris Ashton]

thanks for the help, i really appreciate it, worked a treat

I also need to do this:

array[count + 1]

array[count] returns x but array[count + 1] returns nil when i should be
y

am i totally wrong or is it something else?

thanks

 

[Sebastian Hungerecker]

array[count] returns x but array[count + 1] returns nil when i should be
y

am i totally wrong or is it something else?

Works here:

array=["x","y"] => ["x", "y"]
count=0 => 0
array[count] => "x"
array[count+1]

=> "y"

If array[count+1] does not return y for you that simply means, that y is not
the value following x in your array.

HTH,
Sebastian

 

[Robert Klemme]

thanks for the help, i really appreciate it, worked a treat

I also need to do this:

array[count + 1]

array[count] returns x but array[count + 1] returns nil when i should be
y

am i totally wrong or is it something else?

Depends on count and the size of the Array. Either count is array.size
- 1 in which case array[count + 1] points after the last element. Or
your array contains nil at that position.

irb(main):001:0> a=[1,2,3]
=> [1, 2, 3]
irb(main):002:0> a.size
=> 3
irb(main):003:0> a[a.size]
=> nil
irb(main):004:0> a[0]
=> 1
irb(main):005:0> a[1]
=> 2
irb(main):006:0> a[2]
=> 3
irb(main):007:0> a[3]
=> nil
irb(main):008:0>

Cheers

robert

 

[Roger Reeks]

thanks for the help, much appreciated, got it going

 

[Roger Reeks]

hi ive changed the original array to a nested one and the tab.index no
longer works is there a way to search and and the index still

thanks for any help