CODEWITHSUNDEEP
rubymathmetaprogramming
R.J. Robinson
R.J. Robinson

Reputation: 2240

Evaluate string as an expression

How would you convert a string like "2 + 3 + 4" into an expression that ruby will return the value of 9

but as an integer. I was thinking some sort of .each block, but I feel that would be a very long function. If that is the only way, then fine. Just wanted some other eyes on it.

Upvotes: 2

Views: 1796

Answers (1)

ptierno
ptierno

Reputation: 10074

Take a look at Kernel#eval

[~]$ irb
2.1.2 :001 > eval("2 + 3 + 4")
 => 9
2.1.2 :002 > eval("2 + 3 + 4").class
 => Fixnum

Hope this helps

Upvotes: 2

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