Menu
I have an array of integers.
For example:
array = [123,321,12389] Is there any nice way to get the sum of them?
I know, that
sum = 0 array.each { |a| sum+=a } would work.
936
The sum() of enumerable is an inbuilt method in Ruby returns the sum of all the elements in the enumerable. If a block is given, the block is applied to the enumerable, then the sum is computed. If the enumerable is empty, it returns init. Parameters: The function accepts a block.
Ruby | Array count() operationArray#count() : count() is a Array class method which returns the number of elements in the array. It can also find the total number of a particular element in the array. Syntax: Array. count() Parameter: obj - specific element to found Return: removes all the nil values from the array.
The first() is an inbuilt method in Ruby returns an array of first X elements. If X is not mentioned, it returns the first element only. Parameters: The function accepts X which is the number of elements from the beginning. Return Value: It returns an array of first X elements.
For ruby >= 2.4 you can use sum:
array.sum
For ruby < 2.4 you can use inject:
array.inject(0, :+) Note: the 0 base case is needed otherwise nil will be returned on empty arrays:
> [].inject(:+) nil > [].inject(0, :+) 0 If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
