diff options
Diffstat (limited to 'go.html.markdown')
| -rw-r--r-- | go.html.markdown | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/go.html.markdown b/go.html.markdown index ae99535b..49f1ade4 100644 --- a/go.html.markdown +++ b/go.html.markdown @@ -12,6 +12,7 @@ contributors: - ["Alexej Friesen", "https://github.com/heyalexej"] - ["Clayton Walker", "https://github.com/cwalk"] - ["Leonid Shevtsov", "https://github.com/leonid-shevtsov"] + - ["Michael Graf", "https://github.com/maerf0x0"] --- Go was created out of the need to get work done. It's not the latest trend @@ -30,6 +31,12 @@ Go comes with a good standard library and a sizeable community. /* Multi- line comment */ + /* A build tag is a line comment starting with // +build + and can be execute by go build -tags="foo bar" command. + Build tags are placed before the package clause near or at the top of the file + followed by a blank line or other line comments. */ +// +build prod, dev, test + // A package clause starts every source file. // Main is a special name declaring an executable rather than a library. package main @@ -190,7 +197,7 @@ func learnFlowControl() { x := 42.0 switch x { case 0: - case 1: + case 1, 2: // Can have multiple matches on one case case 42: // Cases don't "fall through". /* @@ -202,6 +209,19 @@ func learnFlowControl() { default: // Default case is optional. } + + // Type switch allows switching on the type of something instead of value + var data interface{} + data = "" + switch c := data.(type) { + case string: + fmt.Println(c, "is a string") + case int64: + fmt.Printf("%d is an int64\n", c) + default: + // all other cases + } + // Like if, for doesn't use parens either. // Variables declared in for and if are local to their scope. for x := 0; x < 3; x++ { // ++ is a statement. |