A hash is a different data structure than an array. Its advantage is that it allows arbitrary strings as keys instead of just a number. The disadvantage is that it can't be sorted. Read about "hash tables" on wikipedia if you want to know why.

In reply to Re^3: sorting hash by a certain value (that it is in an array) by jethro
in thread sorting hash by a certain value (that it is in an array) by gooyava

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