Search in array

Ruby
1

hi all
is there in ruby a method like in_array() php function?

i need to verify if there is a string in an array

2

Alle 09:35, mercoledì 24 gennaio 2007, Giuseppe M. ha scritto:

hi all
is there in ruby a method like in_array() php function?

i need to verify if there is a string in an array

I don’t know php, so I don’t know what in_array() exactly does. At any
rate,
the method include? of the Array class tells whether a given element is
in
the array:

a=[‘a’, ‘b’, ‘c’]
a.include?(‘a’)
=>true
a.include?(‘d’)
=>false

This method uses the == method of the argument to test for equality. If
you
need something different, you can use the grep method, which uses ===
and
returns an array containing the matches (useful, for instance, for
regular
expressions), find, which takes a block and returns the first element
for
which the block returns true, or any? which works like find but returns
a
boolean value indicating whether there was a match:

a=[‘abc’,‘def’]
a.include?(‘a’)
=>false
a.grep(/a/)
=>[‘abc’]

a=[1,2,3]
a.find{|i| i>1}
=>2
a.any?{|i| i>1}
=>true

I hope this helps

3

On 1/24/07, Giuseppe M. [email protected] wrote:

hi all
is there in ruby a method like in_array() php function?

i need to verify if there is a string in an array

array.include? string

ri Array#include?
--------------------------------------------------------- Array#include?
array.include?(obj) → true or false

 Returns +true+ if the given object is present in _self_ (that is,
 if any object +==+ _anObject_), +false+ otherwise.

    a = [ "a", "b", "c" ]
    a.include?("b")   #=> true
    a.include?("z")   #=> false

martin

4

thank you very mutch :wink:
this is that i’m searching