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Ruby

Posted by Ross Peace
Ross Peace
Courses Plus Student 17,401 Points

It's difficult to understand oneline if statement.

Hi,

  1. Could you explain the different the following 2 statements?

answer = answer.to_i if kind == "number" answer = (answer.to_i if kind == "number")

  1. Could you explain why the following statement is valid?

(answer.to_i if kind == "number")

Thanks Ross

2 Answers

Luke Glazebrook
Luke Glazebrook
13,564 Points
Luke Glazebrook
Luke Glazebrook
13,564 Points

Hi Ross!

The brackets are allowed when setting a variable in Ruby because they can be used for mathematical purposes like the following: (40 * 2) + (20+20).

In the example you have given it will just basically encase the statement and not make any difference.

I hope this helped you out!

Ross Peace
Ross Peace
Courses Plus Student 17,401 Points

Hi Luke,

Thanks for your answer, but the following statements are different

answer = answer.to_i if kind == "number" answer = (answer.to_i if kind == "number")

By the way, I want to know the reason why "(answer.to_i if kind == "number")" is valid. According to oneline if statement syntax, "(answer.to_i if kind == "number") " should be same as the following statement "if kind == "number" answer.to_i end" But it's wrong statement.

Thanks, Ross

Ross Peace
PLUS
Ross Peace
Courses Plus Student 17,401 Points
Ross Peace
Ross Peace
Courses Plus Student 17,401 Points

Hi Luke,

Thanks for your answer, but the following statements are different

answer = answer.to_i if kind == "number" answer = (answer.to_i if kind == "number")

By the way, I want to know the reason why "(answer.to_i if kind == "number")" is valid. According to oneline if statement syntax, "(answer.to_i if kind == "number") " should be same as the following statement if kind == "number" answer.to_i end But it's wrong statements.

Thanks, Ross