CODEWITHSUNDEEP
ruby
Zed
Zed

Reputation: 5921

Read data from STDIN specific number of times

I am writing a code that is supposed to read from STDIN exactly n number of times.So lets say 3 times.What is the best way to do that ?

I tried this

counter = 0
while sentence = gets.chomp && counter < 3 do
 ...
 counter += 1
end

but for some strange reason, sentence variable inside loop is Boolean ?

Upvotes: 0

Views: 70

Answers (2)

Neil Slater
Neil Slater

Reputation: 27227

Operator precedence. The line:

while sentence = gets.chomp && counter < 3 do

Is being interpretted as

while sentence = ( gets.chomp && counter < 3 ) do

So, you could do this:

while ( sentence = gets.chomp ) && counter < 3 do

That explains why you got true or false values into sentence, and the third option should fix this, so your code is very close to working. However, it is probably more usual in Ruby to see solutions like Babai's

Upvotes: 1

Arup Rakshit
Arup Rakshit

Reputation: 118299

You can do as below:

n.times { sentence = gets.chomp }

or

n.times do 
  sentence = gets.chomp
  # your code here
end

Upvotes: 2

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