Finding elements in an array that differ by a certain tolerance from elements in another array of different size

What is the best way to do the following:

    count=0
    for i=1:size(array_1,1)
        for j=1:size(array_2,1)
            if abs(array_1(i)-array_2(j))<1
               count=count+1;
               array_3(count)=array_2(j);
            end
         end
    end

The arrays are of different size

Answer 1

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