Question

I have the following code in my controller:

@raw_data = ["124324/12", "345346/15"]
@data_set = []
@raw_data.each do |data| 
    holder = data.split("/")
    holder.first.to_i
    @data_set << holder
end

This returns the following

[["124324", "12"], ["345346", "15"]]

Why has it not converted the first element in each sub array to an integer. Please explain

Answer 1

Because to_i returns the converted value. It doesn’t do an in place conversion. This means that the value of the variable doesn’t change.

@raw_data = ["124324/12", "345346/15"]
@data_set = []
@raw_data.each do |data| 
    holder = data.split("/")
    holder[0] = holder.first.to_i
    @data_set << holder
end