Add Get The Last Item From An Array as a jq TIL

jq/get-the-last-item-from-an-array.md

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+# Get The Last Item From An Array
+
+There are two ways to get the last item from an array using
+[`jq`](https://jqlang.github.io/jq/).
+
+The one that is perhaps a bit more intuitive is to pipe the array to the
+[`last`](https://jqlang.github.io/jq/manual/#first-last-nth-2) function.
+
+```bash
+$ echo '[1,2,3]' | jq '. | last'
+3
+```
+
+Another approach is to use an [array index
+expression](https://jqlang.github.io/jq/manual/#array-index) to positionally
+grab the last element of the array. As is the case with some languages and
+libraries, `-1` positionally refers to the last item in the array.
+
+```bash
+$ echo '[1,2,3]' | jq '.[-1]'
+3
+```