Question

I have an array in ruby and i want to change the values of it’s elements dynamically depending on a particular attribute. Suppose i have an array,

array = [123,134,145,515]

And i want to manipulate this elements like getting all the elements multiplied by a parameter, how can i get it done without having to do it explicitly each time using for loop?

Answer 1

For this, you can use something like the collect method in ruby for arrays.

You can write a method which can be called whenever required passing the array and parameter as argument.

For instance you can write a method similar to this ;

array = [123,134,145,515]
parameter_value = 2

Now, depending on the requirement you can define a method like this :

  array.collect {|x| x * parameter_value}

In this case, this would return an array similar to this :

array = [246, 268, 290, 1030]