Merge pull request #408 from alanpcs/snippet/pluck

Adds pluck

snippets/pluck.md

@@ -0,0 +1,23 @@
+---
+title: pluck
+tags: list,dictionary,beginner
+---
+
+Converts a list of dictionaries into a list of values corresponding to the specified `key`.
+
+- Use a list comprehension and `dict.get()` to get the value of `key` for each dictionary in `lst`.
+
+```py
+def pluck(lst, key):
+  return [x.get(key) for x in lst]
+```
+
+```py
+simpsons = [
+  { 'name': 'lisa', 'age': 8 },
+  { 'name': 'homer', 'age': 36 },
+  { 'name': 'marge', 'age': 34 },
+  { 'name': 'bart', 'age': 10 }
+]
+pluck(simpsons, 'age') # [8, 36, 34, 10]
+```