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Say I have an array. I wish to pass the array to a function. The function, however, expects two arguments. Is there a way to on the fly convert the array into 2 arguments? For example:
a = [0,1,2,3,4] b = [2,3] a.slice(b) Would yield an error in Ruby. I need to input a.slice(b[0],b[1]) I am looking for something more elegant, as in a.slice(foo.bar(b)) Thanks.
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It is also possible to pass an array as an argument to a method. For example, you might want a method that calculates the average of all the numbers in an array. Your main program might look like this: data = [3.5, 4.7, 8.6, 2.9] average = get_average(data) puts "The average is #{average}."
Ruby arrays are ordered, integer-indexed collections of any object. Each element in an array is associated with and referred to by an index. Array indexing starts at 0, as in C or Java.
You can turn an Array into an argument list with the * (or "splat") operator:
a = [0, 1, 2, 3, 4] # => [0, 1, 2, 3, 4] b = [2, 3] # => [2, 3] a.slice(*b) # => [2, 3, 4] If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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