add: slice adv. ops. exercises

2019-03-05 23:32:32 +03:00
parent e379976af4
commit 9c96082326
19 changed files with 810 additions and 99 deletions
--- a/16-slices/exercises/26-print-daily-requests/main.go
+++ b/16-slices/exercises/26-print-daily-requests/main.go
@ -0,0 +1,104 @@
+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Print daily requests
+//
+//  You've got a requests log for a system in a slice: `reqs`.
+//  The log contains the total requests counts per 8 hours.
+//
+//  The reqs slice is a single-dimensional slice but you need
+//  to group the daily into a slice named: `daily`.
+//
+//  Please follow the instructions inside the code to solve
+//  the exercise.
+//
+//
+// EXPECTED OUTPUT
+//
+//   Please run `solution/main.go` to see the expected
+//   output.
+//
+//   go run solution/main.go
+//
+// ---------------------------------------------------------
+
+func main() {
+	//
+	// #1: DAILY REQUESTS DATA
+	//
+	// . The system collects and groups the requests per 8 hours
+	//
+	// . So there are 3 requests totals per day
+	//
+	// . Your code should be robust enough to work with
+	//   insufficient data. For example, in the last day
+	//   there are only two request totals: 100 and 150.
+	//
+	//   So, don't forget to handle that edge case as well.
+	//
+	// . Uncomment the code below and start
+	//
+
+	// reqs := []int{
+	// 	500, 600, 250,
+	// 	200, 400, 50,
+	// 	900, 800, 600,
+	// 	750, 250, 100,
+	// 	100, 150,
+	// }
+
+	//
+	// #2: Group the `reqs` per day into a slice named: `daily`
+	//
+	// . Create the daily slice using the `make` function
+	//
+	// . Anticipate the length argument to the make function using this data:
+	//
+	//   + The length of the reqs slice
+	//   + There are 3 requests totals per day
+	//   + There are residual elements (the last day)
+	//
+	//   ! So, do not blindly allocate a slice.
+	//
+	//   ! Allocate the slice efficiently with the exact size needed.
+	//
+	// . Then append to it the daily requests in a "loop"
+	//
+
+	//
+	// #3: Print the header:
+	//
+	// Day       Requests
+	// ====================
+	//
+
+	//
+	// #4: Print the data per day along with the totals:
+	//
+	// 1         500
+	// 1         600
+	// 1         250
+	// --------------------
+	//           1350  --> Print the daily total requests
+	//
+	// 2         200
+	// 2         400
+	// 2         50
+	// --------------------
+	//           650
+	//
+	//           2000  --> Also print the grand total
+
+	// ------------------------------------------------------------------------
+	//
+	// ❤️ NOTE ❤️
+	//
+	// If you could't solve this challenge. Please do not get discouraged.
+	//
+	// Look at the solution, then try to solve it again. This is valuable too.
+	//
+	// Then ️change the request data, the number of requests per day (now it's 3), etc
+	// and then try to solve it again.
+	//
+	// ------------------------------------------------------------------------
+}