Otherwise, it needs to be <pre class="prettyprint"><code>h = {:a => 1, :b => 2.2} h.each_with_index do |pair, i| k = pair[0]; v = pair[1] p k, v, i end </code></pre> and setting the <code>k</code> and <code>v</code> this way seems a bit clumsy. Can it be simpler or something like <pre class="prettyprint"><code>h.each_with_index do |[k,v], i| </code></pre> ?

In fact, yes! Use parentheses: <pre class="prettyprint"><code>h = {:a => 1, :b => 2.2} h.each_with_index do |(k, v), i| p k, v, i end </code></pre>

In Ruby, is there a way to use something like hash.each_with

Otherwise, it needs to be

h = {:a => 1, :b => 2.2} h.each_with_index do |pair, i|   k = pair[0]; v = pair[1]   p k, v, i end

and setting the k and v this way seems a bit clumsy. Can it be simpler or something like

h.each_with_index do |[k,v], i|

?

How do you check if something is a hash in Ruby?

Overview. A particular value can be checked to see if it exists in a certain hash by using the has_value?() method. This method returns true if such a value exists, otherwise false .

Do hashes have indexes Ruby?

A Hash is a collection of key-value pairs. It is similar to an Array , except that indexing is done via arbitrary keys of any object type, not an integer index.

In fact, yes! Use parentheses:

h = {:a => 1, :b => 2.2} h.each_with_index do |(k, v), i|   p k, v, i end

The Inject call should get what you want, http://www.ruby-doc.org/core/classes/Enumerable.src/M001494.html check that and scroll to the Inject portion, should work like a charm!

In Ruby, is there a way to use something like hash.each_with_index do |[k,v], i|?

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nonopolarity

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molf

Jake Kalstad

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