Ordered Lists are a useful tool in information processing. Unordered lists are just a grouping of things without the order in the list having any sort of meaning, rhyme or reason. Ordered lists note an ordinal relationship between things in the list. One can order ordered lists in ascending or descending orders or can utilize a foreign key to order the items in some different manner. For our purposes ordered lists help us understand the underlying order of different concepts. For our purposes three important lists are fundamental to understanding the guitar. The three ordered lists are notes, intervals and the Circle of 4ths/5ths. Ordering intervals and notes help us understand how to navigate the fret board going up and down it. The circle of 4ths/5ths help us navigate the fret board going across it. As this course develops other ordered lists may be utilized.
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