Hash.collect

[Giant Cranes]

Hi,

I am pulling my hair out trying to figure out the following problem (my
fault not rubys):

I have an array of hashes as follows:

a = Array.new
a << {:name => 'tony', :age => 23}
a << {:name => 'mary', :age => 57}
a << {:name => 'dom', :age => 17}

I am trying to create an array with one attribute from each hash:

['tony', 'mary', 'dom']

Any clues on how I should do this would be much appreciated.

Thanks,
GiantCranes

 

[James Edward Gray II]

I have an array of hashes as follows:

a = Array.new
a << {:name => 'tony', :age => 23}
a << {:name => 'mary', :age => 57}
a << {:name => 'dom', :age => 17}

I am trying to create an array with one attribute from each hash:

['tony', 'mary', 'dom']

a = Array.new => []
a << {:name => 'tony', :age => 23} => [{:name=>"tony", :age=>23}]
a << {:name => 'mary', :age => 57} => [{:name=>"tony", :age=>23}, {:name=>"mary", :age=>57}]
a << {:name => 'dom', :age => 17}

=> [{:name=>"tony", :age=>23}, {:name=>"mary", :age=>57},
{:name=>"dom", :age=>17}]

a.map { |e| e[:name] }

=> ["tony", "mary", "dom"]

Hope that helps.

James Edward Gray II

 

[Jos Backus]

Hi,

I am pulling my hair out trying to figure out the following problem (my
fault not rubys):

I have an array of hashes as follows:

a = Array.new
a << {:name => 'tony', :age => 23}
a << {:name => 'mary', :age => 57}
a << {:name => 'dom', :age => 17}

I am trying to create an array with one attribute from each hash:

['tony', 'mary', 'dom']

Any clues on how I should do this would be much appreciated.

a.collect {|e| e[:name]}

 

[Brian Candler]

a = Array.new
a << {:name => 'tony', :age => 23}
a << {:name => 'mary', :age => 57}
a << {:name => 'dom', :age => 17}

I am trying to create an array with one attribute from each hash:

['tony', 'mary', 'dom']

Any clues on how I should do this would be much appreciated.

b = a.collect { |e| e[:name] }

 

[Giant Cranes]

Wonderful, thanks very much.

 

[gwtmp01]

I am trying to create an array with one attribute from each hash:

['tony', 'mary', 'dom']

Any clues on how I should do this would be much appreciated.

a.map { |h| h[:name] }

Gary Wright