Using array.each_with_index returned an array containing the indexes of several elements which I set equal to a variable, indexes. I just want to know how I can then find the elements at each of those indexes like array[indexes] #=> element 1, element 2, etc. I tried the previous example with no luck, and also array[indexes.each {|x| x}].
Not sure why this is so hard, but I am brand new to coding and I couldn't find the answer elsewhere.
That is what Array#values_at is for:
indices = [0,2]
p ["a", "b", "c", "a"].values_at(*indices) # => ["a", "c"]
You are probably starting wrong.
each_with_index is meant to iterate over your array with an index like this:
array.each_with_index do |element, index|
#do stuff with the element and the index here
end
If you already have your array of indexes and you really want to do it that way you can:
indexes.each do |index|
array[index]
end
You should think of each as a for loop other the element, passing consecutivly each element to the variable in | |. Inside the { } or do ... end you can then do things with your element. It's not meant to be used like x = array.each :)
array.each_with_index I just left off the rest of the the block I used to find which indexes I wanted. Should have left that to be clear. Your solution works, thank you greatly!