Ruby if/assign statement?

Question

I have run to the following code and I have no idea what it does. Why do they use = to compare values or are they assigning values and checking if the value is true after being assigned?

     if value = (key rescue nil)
       ..
     end

The latter. They are assigning a value to value and then checking if it's truthy. — Jordan Running
– Jordan Running, Commented Feb 28, 2018 at 15:57

Anthony · Accepted Answer · 2018-02-28 15:50:22Z

3

This is equivalent to:

value = key rescue nil

if value
  ..  
end

or

value = begin
  key
rescue
  nil
end

if value
  ..  
end

Remember nil and false are the only two objects that are falsey in ruby and since value here could be nil, that if statement could return false.

answered Feb 28, 2018 at 15:50

Anthony

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