The left and right can find the left and right parts of a list. (See Section 6.3.4, Section 6.15.3, Section 6.37.1, Section 6.38.2, Section 6.55.4 and Section 6.55.5 for other uses of left and right.)
Example.
Input:
Output:
⎡ ⎣ | 0,1,2 | ⎤ ⎦ |
Example.
Input:
Output:
⎡ ⎣ | 5,6,7,8 | ⎤ ⎦ |