Go - Method Values
Can assign method to a variable Ex. M = s.methodname; M() Can define func signature and assign implementation later Status will follow methods ...
Recent Posts
Convert CQL query result file hex to ascii
<div> Under Cassandra-2.0.17, I want to query a table by cqlsh</div> First of all, I put query in a file: ~/query.cql select * from "myData"...
Go - Methods - Pointer Receiver
Declare Method Method and Function can be the same name Method and Field can not have the same name Can declare another method name in the sa...
Go - Functions - 6 (panic, recover, stackTrace)
During panic, normal execution stop, defered function in goroutine executed and the program crash with log message Ex. Declare a panic. A pan...
Go - Functions - 5 (variadic function, defer)
Declare variadic function Variadic function parameter type is .... Different from slice. Action can be defered with a defer statement. Defered fun...
Go - Functions - 4
Must declare a func before let func call itself recursively. Otherwise compile error Loop will reuse variable address, so a new variable must be dec...
Go - Functions - 3
Can declare function without name. Called anonymous function. How client know it needs return value? => Because function signature has conc...
Go - Functions - 2
Modifications to the parameter copy don't affect the caller except pointer, slice, map, function, channel A function declaration without a body indica...
Go - Functions - 1
Declare func name(parameter-list) return-list {...} Parameter list type can be declared only once if types are the same func test(a string, b string,...
Go - JSON
ex. var p = Person{}; json.Marshal(p) json.marshal return byte slice contains long string wuthout extraneous Ex.data, err = json.MarshalIndent...
Go - Structs - 7
Name and visibility is implicitly determined by its type Outer struct type gains not just the fields of the embedded type but its methods too
Go - Structs - 5
Comparable struct can be a key of a map. (What will happen when struct value changed?) Can declare a named struct type in another struct as field ...
Go - Structs - 4
Shorthand notation to create and initialize a struct variable Ex. pp := &Point{1,2} It’s same as pp := new(Point) *pp = Point{1,2} If all f...
Go - Structs - 3
A struct can be declared to require client need assign values to each fields with right order. Such pattern will be hard to maintain in the future...
Go - Structs - 2
A named type S CAN NOT declare a field with the same type S, but it can contains a field with type *S, for recursive data structure Zero struct field...
Go - Maps
Declared: map[KeyType]ValueType Ex. m := make(map[string]int) m["a"]=1 m{"b"]=2 Ex. m := map[string]int { "a":1, "b":2,...
Go - Slices
Slices contains many example images, causes I can’t save in Blogger in one article. So I split to 3 parts. Go - Slices (1/3) Go - Slices (2/3) Go - Slices (...