Omit the parentheses in defs when the method doesn't accept any arguments.
1require 'prime'
2
3def main() 4 return Prime.each(2e6).to_enum.reduce(:+)
5end
6Omit the parentheses in defs when the method doesn't accept any arguments.
1def main() 2 for a in 1..1000 do
3 for b in 1..1000 do
4 c = 1000 - a - bOmit the parentheses in defs when the method doesn't accept any arguments.
1
2def main() 3 n = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450"
4 permutations = []
5 for i in 1..(n.length-13) doOmit the parentheses in defs when the method doesn't accept any arguments.
4 Prime.take(n).last
5end
6
7def main() 8 return nthprime(10001)
9end
10puts main()Omit the parentheses in defs when the method doesn't accept any arguments.
1def main() 2 total = 0
3 total2 = 0
4 for i in 1..100 doOmit the parentheses in defs when the method doesn't accept any arguments.
7 return a
8end
9
10def main() 11 count = 1
12 for i in 1..20 do
13 count = count * (i / gcd(i, count).floor())Omit the parentheses in defs when the method doesn't accept any arguments.
3 return s == s.reverse()
4end
5
6def main() 7 palendromes = []
8 for i in 100..1000 do
9 for j in 100..1000 doOmit the parentheses in defs when the method doesn't accept any arguments.
7 return x
8end
9
10def main() 11 x = 600851475143
12 while true do
13 y = smallestFactor(x)Omit the parentheses in defs when the method doesn't accept any arguments.
1def main() 2 a = 1
3 b = 2
4 total = 0Omit the parentheses in defs when the method doesn't accept any arguments.
1def main() 2 total = 0
3 for i in 1..999 do
4 if i % 3 == 0 || i % 5 == 0 then
Description
def should be used with parentheses when there are parameters, and omitted when the method
doesn’t accept any parameters.
Bad practice
def some_method()
# body omitted
end
def some_method_with_parameters param1, param2
# body omitted
end
Recommended
def some_method
# body omitted
end
def some_method_with_parameters(param1, param2)
# body omitted
end