From 0cf5cd7a93dc68f8e9370ab32d653475660ed42e Mon Sep 17 00:00:00 2001 From: "grejo.j" Date: Wed, 14 Dec 2022 19:47:29 +0530 Subject: [PATCH] added example for naked return --- .../multiple-return-values.go | 14 +++++ .../multiple-return-values.hash | 4 +- .../multiple-return-values.sh | 5 ++ public/multiple-return-values | 56 +++++++++++++++++-- 4 files changed, 73 insertions(+), 6 deletions(-) diff --git a/examples/multiple-return-values/multiple-return-values.go b/examples/multiple-return-values/multiple-return-values.go index cb541c4..4ebdc63 100644 --- a/examples/multiple-return-values/multiple-return-values.go +++ b/examples/multiple-return-values/multiple-return-values.go @@ -12,6 +12,16 @@ func vals() (int, int) { return 3, 7 } +// Go's return values may be named. If so, they are treated +// as variables defined at the top of the function. +// A `return“ statement without arguments returns the +// named return values. This is known as a "naked" return. +func split(sum int) (x, y int) { + x = sum * 4 / 9 + y = sum - x + return +} + func main() { // Here we use the 2 different return values from the @@ -24,4 +34,8 @@ func main() { // use the blank identifier `_`. _, c := vals() fmt.Println(c) + + // The split function will return the values of x & y + d, e := split(17) + fmt.Println(d, e) } diff --git a/examples/multiple-return-values/multiple-return-values.hash b/examples/multiple-return-values/multiple-return-values.hash index 4d4b705..956d103 100644 --- a/examples/multiple-return-values/multiple-return-values.hash +++ b/examples/multiple-return-values/multiple-return-values.hash @@ -1,2 +1,2 @@ -c6e4f5dd9c55b5d2aaeb7e939c216ec76f042501 -vZdUvLB1WbK +57e7f6308442d1364b13c9217eae8f934a72b408 +U87Tk2E0TIt diff --git a/examples/multiple-return-values/multiple-return-values.sh b/examples/multiple-return-values/multiple-return-values.sh index 0d4c599..3b38132 100644 --- a/examples/multiple-return-values/multiple-return-values.sh +++ b/examples/multiple-return-values/multiple-return-values.sh @@ -2,6 +2,11 @@ $ go run multiple-return-values.go 3 7 7 +7 10 + +# Naked return statements should be used only in short +# functions. +# They can harm readability in longer functions. # Accepting a variable number of arguments is another nice # feature of Go functions; we'll look at this next. diff --git a/public/multiple-return-values b/public/multiple-return-values index 9fbc33d..b16d8ee 100644 --- a/public/multiple-return-values +++ b/public/multiple-return-values @@ -43,7 +43,7 @@ to return both result and error values from a function.

- + 
package main
@@ -76,6 +76,26 @@ the function returns 2 ints.

+ + +

Go’s return values may be named. If so, they are treated +as variables defined at the top of the function. +A `return“ statement without arguments returns the +named return values. This is known as a “naked” return.

+ + + + + 
+func split(sum int) (x, y int) {
+    x = sum * 4 / 9
+    y = sum - x
+    return
+}
+
+ + + @@ -109,11 +129,25 @@ call with multiple assignment.

use the blank identifier _.

- + 
     _, c := vals()
     fmt.Println(c)
+
+ + + + + +

The split function will return the values of x & y

+ + + + + 
+    d, e := split(17)
+    fmt.Println(d, e)
 }
@@ -132,7 +166,21 @@ use the blank identifier _.

$ go run multiple-return-values.go
 3
 7
-7
+7 +7 10 + + + + + +

Naked return statements should be used only in short +functions. +They can harm readability in longer functions.

+ + + + + @@ -163,7 +211,7 @@ feature of Go functions; we’ll look at this next.