I'm new to Ruby and I can't think of how to do this! I would like each
element in an array to compare itself with all its proceeding elements.

For example:

In an array of 10 elements,
a[0] will be compared to a[1] ... a[9]
a[1] will be compared to a[2] ... a[9]
...
a[9] will not be compared, as there is nothing larger than it.

For those who don't understand, I think the Java/C++ equivalent would
be:

for(int i=0; i < array.length; i++) {
   for(int j=i+1; j < array.length; j++) {
      // Compare array[i] with array[j]
   }
}
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