presence() public

Returns the receiver if it’s present otherwise returns nil. object.presence is equivalent to

object.present? ? object : nil

For example, something like

state = params[:state] if params[:state].present? country = params[:country] if params[:country].present? region = state || country || 'US'

becomes

region = params[:state].presence || params[:country].presence || 'US'

@return [Object]

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