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edited Apr 28, 2018 at 19:16a.zip(b).map{|x, y| x * y}This works because zip combines the two arrays into a single array of two element arrays. i.e.:
a = [3, 2, 1]b = [1, 2, 3]a.zip(b)#=> [[3, 1], [2, 2], [1, 3]]Then you use map to multiply the elements together. This is done by iterating through each two element array and multiplying one element by the other, with map returning the resulting array.
a.zip(b).map{|x, y| x * y}#=> [3, 4, 3]Content Under CC-BY-SA license Ruby: Multiply all elements of an array - Stack Overflow
Mar 5, 2019 · Let's say I have an array A = [1, 2, 3, 4, 5] how can I multiply all elements with ruby and get the result? 1*2*3*4*5 = 120. and what if there is an element 0 ? How can I ignore this …
Other content from stackoverflow.comMultiply every element of an n-dimensional array by a number in …
Oct 14, 2011 · In Ruby, is there a simple way to multiply every element in an n-dimensional array by a single number? Such that: [1,2,3,4,5].multiplied_by 2 == [2,4,6,8,10] and …
- Question & Answer
Ruby: Multiply All Elements of an Array - Terra Magnetica
Jul 8, 2024 · Discover the magic of Ruby's array manipulation with the 'ruby multiply all elements of an array' method. Streamline complex operations effortlessly.
Ruby | Operators - GeeksforGeeks
Apr 23, 2024 · There are different types of operators used in Ruby as follows: Arithmetic Operators. These are used to perform arithmetic/mathematical operations on operands. Addition (+): operator adds two operands. For example, x+y. Subtraction (-): operator subtracts two operands. For example, x-y. Multiplication (*): operator multiplies two operands.
math - Array Multiplication and Division - Software Engineering …
Ruby’s model is provided more for convenience than correctness, and is inconsistent: array + array is array concatenation, allowing duplicates, but array - array is set difference, removing …
How To Use Array Methods in Ruby - DigitalOcean
Jan 27, 2023 · You can also convert an array to a string, transform one array of data into another, and roll up an array into a single value. In this tutorial, you’ll explore some of the most practical …
r/ruby on Reddit: How to multiply one array times another array ...
For multiplying multi-dimensional arrays use Matrix: $ cat t.rb. require 'matrix' a = Matrix[[1.1, 2.4, 3.8], [4.7, 2.2, 6.5], [5.3, 7.4, 8.9]] b = Matrix[[4.6, 3.7, 2.1], [5.3, 8.3, 8.4], [1.2, 6.5, 9.2]] p a * …
How To Work with Arrays in Ruby - DigitalOcean
Jan 27, 2023 · Arrays let you store multiple values in a single variable. In Ruby, arrays can contain any data type, including numbers, strings, and other Ruby objects. This can condense and organize your code, making it more readable …
multiply each element in array ruby | Code Ease
In this tutorial, you learned how to multiply each element in an array in Ruby. You learned two methods for doing this: Array#map and Array#inject . You also saw some code examples and outputs that demonstrated how to use these methods.
Ruby arrays - working with arrays in Ruby - ZetCode
Oct 18, 2023 · We put various Ruby objects inside the various array. various = [1, -1, "big", 3.4, Empty.new, nums, :two] The array contains numbers, a string, a custom object, another array …
Multiply elements in array - Ruby - Ruby-Forum
Jul 7, 2008 · If I manage to modify arr to a2 = [[“abc”, “abc”, “abc”], [“def”, “def”, “def”]] I could simply use .transpose to get arr_final…
Arrays of Arrays (two-dimensional arrays in Ruby) - CodeAhoy
Here is an example of 3-dimensional array in Ruby: arr=[[%w (a b c),%w (d e f),%w (g h i)],[%w (aa bb cc),%w (dd ee ff),%w (gg hh ii)]] It’s array of 2 by 3 by 3: two blocks, each block has 3 …
ruby - Multiply each item in an array by each item in another array ...
In Ruby, how can one multiply every element in one array by every element in another array, such that: a = [1,2,3] b = [4,5,6] c = a*b = [4,5,6,8,10,12,12,15,18]
MULTIPLYING an array ELEMENT in while loop ruby
Apr 14, 2019 · I have an array of integers, and I am attempting to multiply every second element by 2 moving backwards in the array. However, it does not seem to accept the * operator on the …
class Array - Documentation for Ruby 3.2
Here is a way to create a multi-dimensional array: Array. new (3) {Array. new (3)} # => [ [nil, nil, nil], [nil, nil, nil], [nil, nil, nil]]
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