Render an ERB template with values from a hash

require 'erb'require 'ostruct'def render(template, vars)  ERB.new(template).result(OpenStruct.new(vars).instance_eval { binding })end

e.g

render("Hey, <%= first_name %> <%= last_name %>", first_name: "James", last_name: "Moriarty")# => "Hey, James Moriarty" 

Update:

A simple example without ERB:

def render(template, vars)  eval template, OpenStruct.new(vars).instance_eval { binding }end

e.g.

render '"Hey, #{first_name} #{last_name}"', first_name: "James", last_name: "Moriarty"# => "Hey, James Moriarty

Update 2: checkout @adam-spiers comment below.

I don't know if this qualifies as "more elegant" or not:

require 'erb'require 'ostruct'class ErbalT < OpenStruct  def render(template)    ERB.new(template).result(binding)  endendet = ErbalT.new({ :first => 'Mislav', 'last' => 'Marohnic' })puts et.render('Name: <%= first %> <%= last %>')

Or from a class method:

class ErbalT < OpenStruct  def self.render_from_hash(t, h)    ErbalT.new(h).render(t)  end  def render(template)    ERB.new(template).result(binding)  endendtemplate = 'Name: <%= first %> <%= last %>'vars = { :first => 'Mislav', 'last' => 'Marohnic' }puts ErbalT::render_from_hash(template, vars)

(ErbalT has Erb, T for template, and sounds like "herbal tea". Naming things is hard.)

Ruby 2.5 has ERB#result_with_hash which provides this functionality:

$ ruby -rerb -e 'p ERB.new("Hi <%= name %>").result_with_hash(name: "Tom")'"Hi Tom"