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?
Are you looking for this:
array = [123,134,145,515]
n = <any number>
array1 =array.map{|a| a * n}
or
array.map!{|a| a * n} #which modify the array object itself
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]