commit 704c8167b023e0d79844685876724c609799dab2
parent ac43b42528997ced6cbfe1e5e62317ba1ed9470b
Author: dwrz <dwrz@dwrz.net>
Date: Fri, 28 Jun 2019 07:32:48 +0000
Add go/hello-world
Diffstat:
3 files changed, 82 insertions(+), 0 deletions(-)
diff --git a/go/hello-world/README.md b/go/hello-world/README.md
@@ -0,0 +1,39 @@
+# Hello World
+
+The classical introductory exercise. Just say "Hello, World!".
+
+["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
+the traditional first program for beginning programming in a new language
+or environment.
+
+The objectives are simple:
+
+- Write a function that returns the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+## Running the tests
+
+To run the tests run the command `go test` from within the exercise directory.
+
+If the test suite contains benchmarks, you can run these with the `--bench` and `--benchmem`
+flags:
+
+ go test -v --bench . --benchmem
+
+Keep in mind that each reviewer will run benchmarks on a different machine, with
+different specs, so the results from these benchmark tests may vary.
+
+## Further information
+
+For more detailed information about the Go track, including how to get help if
+you're having trouble, please visit the exercism.io [Go language page](http://exercism.io/languages/go/resources).
+
+## Source
+
+This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.
diff --git a/go/hello-world/hello_world.go b/go/hello-world/hello_world.go
@@ -0,0 +1,6 @@
+package greeting
+
+// HelloWorld returns the string "Hello, World!"
+func HelloWorld() string {
+ return "Hello, World!"
+}
diff --git a/go/hello-world/hello_world_test.go b/go/hello-world/hello_world_test.go
@@ -0,0 +1,37 @@
+package greeting
+
+import "testing"
+
+// Define a function named HelloWorld that takes no arguments,
+// and returns a string.
+// In other words, define a function with the following signature:
+// HelloWorld() string
+
+func TestHelloWorld(t *testing.T) {
+ expected := "Hello, World!"
+ if observed := HelloWorld(); observed != expected {
+ t.Fatalf("HelloWorld() = %v, want %v", observed, expected)
+ }
+}
+
+// BenchmarkHelloWorld() is a benchmarking function. These functions follow the
+// form `func BenchmarkXxx(*testing.B)` and can be used to test the performance
+// of your implementation. They may not be present in every exercise, but when
+// they are you can run them by including the `-bench` flag with the `go test`
+// command, like so: `go test -v --bench . --benchmem`
+//
+// You will see output similar to the following:
+//
+// BenchmarkHelloWorld 2000000000 0.46 ns/op
+//
+// This means that the loop ran 2000000000 times at a speed of 0.46 ns per loop.
+//
+// While benchmarking can be useful to compare different iterations of the same
+// exercise, keep in mind that others will run the same benchmarks on different
+// machines, with different specs, so the results from these benchmark tests may
+// vary.
+func BenchmarkHelloWorld(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ HelloWorld()
+ }
+}
