mapkeys

The reflection mechanism of go is to be carried out through the interface, and the null interface of object like Java can interact with any type, so reflection on the basic data type is also directly used in this feature.Package Mainimport ("FMT"

https://golang.org/pkg/reflect/The most important official documents, it is recommended to rough time to see this article first. Go's reflect is still relatively simple, can quickly get started.

Database OperationsView all Databases hive> show databases; working with default databases hive> Use default; View database Information Hive > describe database default;OkDb_name Comment location owner_name owner_

This is a creation in Article, where the information may have evolved or changed. Determine the type of reflectvalue and extract the data Addressable Gets the name of the struct method Judge reflect. Value type

This is a creation in Article, where the information may have evolved or changed. Functions in the Value.go Func Append (S Value, x ... Value) value Func Appendslice (S, t value) value Func Indirect (v value)

(gdb) Mapkeys c-b: Break "${fname}": ${lnum} # Set breakpoint @ Current line c-d: Down c-e: Clear "${fname} ": ${lnum} # Clear breakpoint at current line c-n: Next c-p: Print ${text} # Print value of selection at MOUs E position c-u:

STL containers can be grouped into the following broad categories:One: Sequence container, vector, list, deque, String. II: Associated containers, with set, Multiset, map, Mulmap Hash_set,hash_map, Hash_multiset, Hash_multimap Third: Other

STL the container can be divided into the following major categories :One: Sequence container, with vector, list, deque, string. two : Associative Container , There are set, Multiset, map, Mulmap, hash_set, Hash_map, Hash_multiset,

hive Array, map, struct use Hive provides a composite data type:Structs:structs internal data can be accessed via dot (.), for example, a column C in a table is of type struct{a int; b int}, we can access domain A by C.AMaps (k-v pair): Access to