Using hash for method parameters


#1

#hi,

#I have a login class

class Login

def with(:username, :password)
login.username.set(:username)
login.password.set(:password)
end
end

#now in my invocation, I would like to do something like this,

login = Login.new
login.with(:username => ‘aidy’, :password => ‘aidy1’)

#but I am ensure of my syntax

#regards

#aidy


#2

On 30 May, 18:17, Roseanne Z. removed_email_address@domain.invalid wrote:

login = Login.new
login.with(“abc”, “def”)
p login

Thanks for the post, but I am trying to explicitly name the parameters
in the call, by attempting to use symbols and a hash, to make things a
little more readable.

So, I would like my call to contain something like this:

login = Login.new
login.with(:username => ‘aidy’, :password => ‘aidy1’)

cheers

aidy


#3

On May 30, 2007, at 12:10 PM, aidy wrote:

end

#now in my invocation, I would like to do something like this,

login = Login.new
login.with(:username => ‘aidy’, :password => ‘aidy1’)

#but I am ensure of my syntax

You could do it with

class Login def with(params) @username = params[:username] @password = params[:password] end end

login = Login.new
login.with(:username => ‘aidy’, :password => ‘aidy1’)
login.inspect # => “#<Login:0x24090 @password=“aidy1”, @username=
“aidy”>”

but I’d go with

class Login def initialize(params) @username = params[:username] @password = params[:password] end end

login = Login.new(:username => ‘aidy’, :password => ‘aidy1’)
login.inspect # => “#<Login:0x23d48 @password=“aidy1”, @username=
“aidy”>”

as being simpler.

Regards, Morton


#4

aidy wrote:

#hi,

#but I am ensure of my syntax

#regards

#aidy

Are you creating your new language?

Try the following:

class Login

def with(username, password)
@username = username
@password = password
end
end

#now in my invocation, I would like to do something like this,

login = Login.new
login.with(“abc”, “def”)
p login


#5

On 2007-05-31 02:35:08 +0900 (Thu, May), removed_email_address@domain.invalid
wrote:

end
So, I would like my call to contain something like this:

login = Login.new
login.with(:username => ‘aidy’, :password => ‘aidy1’)

You can use something like this:

def with params = {}
params.each do |key,value|
m = “#{key}=”
self.send(m, value) if self.respond_to?(m)
end
end

but you should build-in additional checks which will filter out possibly
unsafe assignments, which you would not want here.

Another thing, you may want to call it ‘initialize’, to be able to use:

login = Login.new :username => ‘username’, :password => ‘pass’

BTW this is similiar to how ActiveRecord works.


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#6

login.with(“abc”, “def”)

cheers

aidy

You could use something like:

class Login
def with(params)
@username = params[:username]
@password = params[:password]
end
end

login = Login.new
login.with({:username => ‘aidy’, :password => ‘aidy1’})

Haven’t tested this but it gives the general idea.

Gary Thomas