Ruby/Rails working with gsub and arrays
Is this what you are looking for?
ruby-1.9.2-p0 > arr = ["This is some sample text", "text file"] => ["This is some sample text", "text file"] ruby-1.9.2-p0 > arr = arr.map {|s| s.gsub(/text/, 'document')} => ["This is some sample document", "document file"]
a = ['This is some sample text', 'This is some sample text', 'This is some sample text']so a is the example array, and then loop through the array and replace the value
a.each do |s| s.gsub!('This is some sample text', 'replacement')end
Replace everything
Using Array#fill.
irb(main):008:0> a=> {:a=>1, :b=>2, :c=>3, :d=>nil, :e=>5}irb(main):009:0> a.values=> [1, 2, 3, nil, 5]irb(main):010:0> a.values.fill(:x)=> [:x, :x, :x, :x, :x]Replace only matching elements
Using Array#map and a ternary operator.
irb(main):008:0> a=> {:a=>1, :b=>2, :c=>3, :d=>nil, :e=>5}irb(main):009:0> a.values=> [1, 2, 3, nil, 5]irb(main):012:0> a.values.map { |x| x.nil? ? 'void' : x }=> [1, 2, 3, "void", 5]irb(main):016:0> a.values.map { |x| /\d/.match?(x.to_s) ? 'digit' : x }=> ["digit", "digit", "digit", nil, "digit"]