Revert "Used any? instead of length call"
Reason: This is slower, and any? is not equivalent in the general case. See discussion in https://github.com/rails/rails/pull/3779 This reverts commit 20cbf8ed.
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Reason: This is slower, and any? is not equivalent in the general case. See discussion in https://github.com/rails/rails/pull/3779 This reverts commit 20cbf8ed.