diff options
Diffstat (limited to 'go.html.markdown')
| -rw-r--r-- | go.html.markdown | 46 |
1 files changed, 23 insertions, 23 deletions
diff --git a/go.html.markdown b/go.html.markdown index c85209e0..bedc3042 100644 --- a/go.html.markdown +++ b/go.html.markdown @@ -12,7 +12,7 @@ contributors: - ["Alexej Friesen", "https://github.com/heyalexej"] --- -Go was created out of the need to get work done. It's not the latest trend +Go was created out of the need to get work done. It's not the latest trend in computer science, but it is the newest fastest way to solve real-world problems. @@ -26,7 +26,7 @@ Go comes with a great standard library and an enthusiastic community. ```go // Single line comment /* Multi- - line comment */ + line comment */ // A package clause starts every source file. // Main is a special name declaring an executable rather than a library. @@ -41,8 +41,8 @@ import ( "strconv" // String conversions. ) -// A function definition. Main is special. It is the entry point for the -// executable program. Love it or hate it, Go uses brace brackets. +// A function definition. Main is special. It is the entry point for the +// executable program. Love it or hate it, Go uses brace brackets. func main() { // Println outputs a line to stdout. // Qualify it with the package name, fmt. @@ -77,7 +77,7 @@ func learnTypes() { s2 := `A "raw" string literal can include line breaks.` // Same string type. - // Non-ASCII literal. Go source is UTF-8. + // Non-ASCII literal. Go source is UTF-8. g := 'Σ' // rune type, an alias for int32, holds a unicode code point. f := 3.14195 // float64, an IEEE-754 64-bit floating point number. @@ -94,9 +94,9 @@ can include line breaks.` // Same string type. var a4 [4]int // An array of 4 ints, initialized to all 0. a3 := [...]int{3, 1, 5} // An array of 3 ints, initialized as shown. - // Slices have dynamic size. Arrays and slices each have advantages + // Slices have dynamic size. Arrays and slices each have advantages // but use cases for slices are much more common. - s3 := []int{4, 5, 9} // Compare to a3. No ellipsis here. + s3 := []int{4, 5, 9} // Compare to a3. No ellipsis here. s4 := make([]int, 4) // Allocates slice of 4 ints, initialized to all 0. var d2 [][]float64 // Declaration only, nothing allocated here. bs := []byte("a slice") // Type conversion syntax. @@ -116,7 +116,7 @@ can include line breaks.` // Same string type. fmt.Println(s) // Updated slice is now [1 2 3 4 5 6 7 8 9] p, q := learnMemory() // Declares p, q to be type pointer to int. - fmt.Println(*p, *q) // * follows a pointer. This prints two ints. + fmt.Println(*p, *q) // * follows a pointer. This prints two ints. // Maps are a dynamically growable associative array type, like the // hash or dictionary types of some other languages. @@ -142,7 +142,7 @@ func learnNamedReturns(x, y int) (z int) { return // z is implicit here, because we named it earlier. } -// Go is fully garbage collected. It has pointers but no pointer arithmetic. +// Go is fully garbage collected. It has pointers but no pointer arithmetic. // You can make a mistake with a nil pointer, but not by incrementing a pointer. func learnMemory() (p, q *int) { // Named return values p and q have type pointer to int. @@ -220,7 +220,7 @@ func learnFlowControl() { func(a, b int) int { return (a + b) * 2 }(10, 2)) // Called with args 10 and 2 - // => Add + double two numbers: 24 + // => Add + double two numbers: 24 // When you need it, you'll love it. goto love @@ -267,7 +267,7 @@ type pair struct { x, y int } -// Define a method on type pair. Pair now implements Stringer. +// Define a method on type pair. Pair now implements Stringer. func (p pair) String() string { // p is called the "receiver" // Sprintf is another public function in package fmt. // Dot syntax references fields of p. @@ -275,13 +275,13 @@ func (p pair) String() string { // p is called the "receiver" } func learnInterfaces() { - // Brace syntax is a "struct literal." It evaluates to an initialized - // struct. The := syntax declares and initializes p to this struct. + // Brace syntax is a "struct literal". It evaluates to an initialized + // struct. The := syntax declares and initializes p to this struct. p := pair{3, 4} fmt.Println(p.String()) // Call String method of p, of type pair. var i Stringer // Declare i of interface type Stringer. i = p // Valid because pair implements Stringer - // Call String method of i, of type Stringer. Output same as above. + // Call String method of i, of type Stringer. Output same as above. fmt.Println(i.String()) // Functions in the fmt package call the String method to ask an object @@ -319,7 +319,7 @@ func learnErrorHandling() { // prints 'strconv.ParseInt: parsing "non-int": invalid syntax' fmt.Println(err) } - // We'll revisit interfaces a little later. Meanwhile, + // We'll revisit interfaces a little later. Meanwhile, learnConcurrency() } @@ -330,12 +330,12 @@ func inc(i int, c chan int) { // We'll use inc to increment some numbers concurrently. func learnConcurrency() { - // Same make function used earlier to make a slice. Make allocates and + // Same make function used earlier to make a slice. Make allocates and // initializes slices, maps, and channels. c := make(chan int) - // Start three concurrent goroutines. Numbers will be incremented + // Start three concurrent goroutines. Numbers will be incremented // concurrently, perhaps in parallel if the machine is capable and - // properly configured. All three send to the same channel. + // properly configured. All three send to the same channel. go inc(0, c) // go is a statement that starts a new goroutine. go inc(10, c) go inc(-805, c) @@ -348,7 +348,7 @@ func learnConcurrency() { go func() { c <- 84 }() // Start a new goroutine just to send a value. go func() { cs <- "wordy" }() // Again, for cs this time. // Select has syntax like a switch statement but each case involves - // a channel operation. It selects a case at random out of the cases + // a channel operation. It selects a case at random out of the cases // that are ready to communicate. select { case i := <-c: // The value received can be assigned to a variable, @@ -358,7 +358,7 @@ func learnConcurrency() { case <-ccs: // Empty channel, not ready for communication. fmt.Println("didn't happen.") } - // At this point a value was taken from either c or cs. One of the two + // At this point a value was taken from either c or cs. One of the two // goroutines started above has completed, the other will remain blocked. learnWebProgramming() // Go does it. You want to do it too. @@ -397,15 +397,15 @@ func requestServer() { The root of all things Go is the [official Go web site](http://golang.org/). There you can follow the tutorial, play interactively, and read lots. -The language definition itself is highly recommended. It's easy to read +The language definition itself is highly recommended. It's easy to read and amazingly short (as language definitions go these days.) You can play around with the code on [Go playground](https://play.golang.org/p/tnWMjr16Mm). Try to change it and run it from your browser! Note that you can use [https://play.golang.org](https://play.golang.org) as a [REPL](https://en.wikipedia.org/wiki/Read-eval-print_loop) to test things and code in your browser, without even installing Go. On the reading list for students of Go is the [source code to the standard -library](http://golang.org/src/pkg/). Comprehensively documented, it +library](http://golang.org/src/pkg/). Comprehensively documented, it demonstrates the best of readable and understandable Go, Go style, and Go -idioms. Or you can click on a function name in [the +idioms. Or you can click on a function name in [the documentation](http://golang.org/pkg/) and the source code comes up! Another great resource to learn Go is [Go by example](https://gobyexample.com/). |