Why does this output the same hash again (like hash.inspect) and not
each key as I want?
@myhash.each { |k,v| “
On 15 February 2011 16:46, Paul B. [email protected] wrote:
Why does this output the same hash again (like hash.inspect) and not
each key as I want?@myhash.each { |k,v| “
” + k + “ ” }
Because it is showing the return value of the method each, not what
you are doing in the block. You need to build up a string in the
block which is the concatenation of your li strings.
Crudely, something like
str = “”
@myhash.each { |k,v| str += “
Colin
Or since only keys are needed, use each_key iterator.
Also, I think ri should say that the “method” each “returns” the same
Hash
on which you called the method.
-Kedar
Kedar M. wrote in post #981823:
Or since only keys are needed, use each_key iterator.
Also, I think ri should say that the “method” each “returns” the same
Hash
on which you called the method.-Kedar
I actually need both.
Hmm. This should output a string in view but it doesn’t:
<% h = { “a” => 100, “b” => 200 } %>
<%= h.each {|key, value| puts “#{key} is #{value}” } %>
On Tue, Feb 15, 2011 at 10:26 AM, Paul B.
[email protected]wrote:
Sure, each or each_pair.
Hmm. This should output a string in view but it doesn’t:
<% h = { “a” => 100, “b” => 200 } %>
First: Consider using Symbols (not required, but ubiquitous) as that is
the
Railism 
<%= h.each {|key, value| puts “#{key} is #{value}” } %>
That’s perhaps because you’re dealing with output stream, (and not view
of a
controller) of your Rails server when you use puts.
You should collate the response in a variable like Colin showed and just
do:
<%=str %> which puts the contents of the string in the view.
HTH,
-Kedar
It works as a ruby script. But not in Rails. Strange.
On Tue, Feb 15, 2011 at 11:20 AM, Paul B.
[email protected]wrote:
It works as a ruby script. But not in Rails. Strange.
Or rather it works in Rails too. But does not do what you want. No wait,
but
it does do what you told it to do 
-Kedar
On 15 February 2011 18:26, Paul B. [email protected] wrote:
Hmm. This should output a string in view but it doesn’t:
<% h = { “a” => 100, “b” => 200 } %>
<%= h.each {|key, value| puts “#{key} is #{value}” } %>
It certainly won’t do what you think it should…
As has already been pointed out, the .each method on a hash returns
the original hash, so your code is going to put some text onto the
console (not the same as rendering in the browser) and then render the
original hash in the browser.
You probably want something more like:
<% test_hash = { “a” => 100, “b” => 200 } %>
<% test_hash.each do |key, value| %>
<%=puts “#{h key} is #{h value}” %>
<% end%>
Or use .inject to collect up all the return values of the block and
render that…
Check out the api for lots more handy Hash/Enumerable methods, and
exactly how they should work. I can heartily recommend playing with
them in a console window to get to grips with how they work.
http://ruby-doc.org/core/classes/Hash.html
http://ruby-doc.org/core/classes/Enumerable.html
PS “h” is a bad name for a variable, and not idiomatic. It would
replace the “h” shortcut for html encoding (assuming Rails 2.x) and
isn’t very descriptive of it’s intention
On 15 February 2011 19:54, Michael P. [email protected] wrote:
You probably want something more like:
<%=puts “#{h key} is #{h value}” %>
Of course… without the “puts” :-/
<%= “#{h key} is #{h value}” %>
On 15 February 2011 18:26, Paul B. [email protected] wrote:
Hmm. This should output a string in view but it doesn’t:
<% h = { “a” => 100, “b” => 200 } %>
<%= h.each {|key, value| puts “#{key} is #{value}” } %>
Just in case it is not clear from the other replies, when you execute
puts when running as a rails app the output will go to the server
terminal window, that is the terminal where you typed rails server.
If you look there you will probably see it mixed up with all the
server stuff.
Colin
can’t you use collect? and then join the result?
@myhash.each {|k,v| “
On Wed, Feb 16, 2011 at 12:46 AM, Paul B.
[email protected]wrote:
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–
ooops. sorry. should be
@myhash.collect {|k,v| “
On Wed, Feb 16, 2011 at 8:19 AM, Jim Ruther N. [email protected]
wrote:
@myhash.each { |k,v| “
” + k + “ ” }
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.–
visit my blog at http://jimlabs.heroku.com
–
Colin L. wrote in post #981819:
On 15 February 2011 16:46, Paul B. [email protected] wrote:
Why does this output the same hash again (like hash.inspect) and not
each key as I want?@myhash.each { |k,v| “
” + k + “ ” }Because it is showing the return value of the method each, not what
you are doing in the block. You need to build up a string in the
block which is the concatenation of your li strings.
Crudely, something like
str = “”
@myhash.each { |k,v| str += “#{k} ” }Colin
Thanks. I didn’t see your respons until now.