Add Skip The Front Of An Array With Drop as a Ruby TIL

ruby/skip-the-front-of-an-array-with-drop.md

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+# Skip The Front Of An Array With Drop
+
+I've long been familiar with Ruby's
+[`Array#take`](https://apidock.com/ruby/Array/take) which is a handy way to
+grab the first few elements of an array.
+
+```ruby
+> [:a, :b, :c, :d, :e, :f, :g].take(4)
+=> [:a, :b, :c, :d]
+```
+
+But what if I want to skip those first four elements of the array and get what
+remains. That is where [`Array#drop`](https://apidock.com/ruby/Array/drop)
+comes in.
+
+```ruby
+> [:a, :b, :c, :d, :e, :f, :g].drop(4)
+=> [:e, :f, :g]
+```
+
+How about a couple practical situations for use in a Rails app.
+
+Here I want to segment out the first 6 books and whatever remains:
+
+```
+def index
+  @books = Book.order(created_at: :desc).limit(10)
+
+  @featured_books = @books.take(6)
+  @remaining_books = @books.drop(6)
+end
+```
+
+Or, what about cleaning up all but the first of these duplicate records:
+
+```
+Book
+  .where(title: "The Murder of Roger Ackroyd")
+  .drop(1)
+  .each { |duplicate_book| duplicate_book.destroy }
+```
+
+The first record is ignored (dropped from the array) and the following records
+are processed by the `#each` where they get destroyed.