- first: http://jsfiddle.net/zsFvE/
- last: http://jsfiddle.net/hJZUE/
- add items: http://jsfiddle.net/FD7jQ/
- first loop http://jsfiddle.net/YM7th/
- backwards http://jsfiddle.net/5QgwK/
- evens http://jsfiddle.net/7fseh/
- evens and odds http://jsfiddle.net/4zfcz/
- Flag http://jsfiddle.net/j95XA/
- reverse http://jsfiddle.net/QqrLs/
- groceryList http://jsfiddle.net/2Lt4m/1/
- copyAndAdd http://jsfiddle.net/nm5Q7/
- compact: http://jsfiddle.net/kcmLh/
If you finish all the fiddes, do the 'aboutArrays' section of the Koans here https://github.com/devmountain/js-koans
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