go

Get pointer on var obtained via interface

由 大城市里の小女人 提交于 2021-02-11 12:09:28
问题 In the following code var a int var b interface{} b = a fmt.Printf("%T, %T \n", a, &a) fmt.Printf("%T, %T \n", b, &b) output: int, *int int, *interface {} I would expect the type of &b to be a pointer on int. I have two questions: 1) Why is it a pointer on interface{} ? 2) How could I get a pointer on the original type ? 回答1: &b => this is the address operator applied on the variable b , whose type is interface{} . So &b will be a pointer of type *interface{} , pointing to the variable b . If

How do I parse ndjson file using Golang? [duplicate]

由 孤人 提交于 2021-02-11 12:08:17
问题 This question already has answers here : Parsing multiple JSON objects in Go (4 answers) Closed last year . I have a ndjson (newline delimited JSON) file, I need to parse it and get the data for some logical operation. Is there any good method for parsing ndjson files using golang. A sample ndjson is given below {"a":"1","b":"2","c":[{"d":"100","e":"10"}]} {"a":"2","b":"2","c":[{"d":"101","e":"11"}]} {"a":"3","b":"2","c":[{"d":"102","e":"12"}]} 回答1: The encoding/json Decoder parses sequential

SQL Server 解读【已分区索引的特殊指导原则】（1）- 索引对齐（转载）

由 浪子不回头ぞ 提交于 2021-02-11 10:47:29
一、前言 　　在MSDN上看到一篇关于SQL Server 表分区的文档： 已分区索引的特殊指导原则 ，如果你对表分区没有实战经验的话是比较难理解文档里面描述的意思。这里我就里面的一些概念进行讲解，方便大家的交流。 （Figure0：索引与基表对齐） 二、解读 “索引要与其基表对齐，并不需要与基表参与相同的命名分区函数。但是，索引和基表的分区函数在实质上必须相同，即： 1) 分区函数的参数具有相同的数据类型； 2) 分区函数定义了相同数目的分区； 3) 分区函数为分区定义了相同的边界值。” 下面我们进行测试： -- 1.创建文件组 ALTER DATABASE [ Test ] ADD FILEGROUP [ FG_TestUnique_Id_01 ] ALTER DATABASE [ Test ] ADD FILEGROUP [ FG_TestUnique_Id_02 ] ALTER DATABASE [ Test ] ADD FILEGROUP [ FG_TestUnique_Id_03 ] -- 2.创建文件 ALTER DATABASE [ Test ] ADD FILE (NAME = N ' FG_TestUnique_Id_01_data ' ,FILENAME = N ' E:\DataBase\FG_TestUnique_Id_01_data.ndf '

how to verify Google ID-token?

由 旧街凉风 提交于 2021-02-11 10:02:50
问题 I want to authenticate Android users with a Go AppEngine backend, I can easily get an ID-token in Android by following http://android-developers.blogspot.co.il/2013/01/verifying-back-end-calls-from-android.html how can I verify the token and get the payload ? is there a Go package for this ? 回答1: I found the solution myself, the ID-token can be verified with the oauth2/v2 package of the https://code.google.com/p/google-api-go-client/ library. some installation tweaks are necessary for using

图深度学习论文笔记整理活动 | ApacheCN

由 ぃ、小莉子 提交于 2021-02-11 08:28:49
整体进度： https://github.com/apachecn/graph-emb-dl-notes/issues/1 贡献指南： https://github.com/apachecn/graph-emb-dl-notes/blob/master/CONTRIBUTING.md 项目仓库： https://github.com/apachecn/graph-emb-dl-notes 贡献指南 请您勇敢地去翻译和改进翻译。虽然我们追求卓越，但我们并不要求您做到十全十美，因此请不要担心因为翻译上犯错——在大部分情况下，我们的服务器已经记录所有的翻译，因此您不必担心会因为您的失误遭到无法挽回的破坏。（改编自维基百科） 负责人： 飞龙 ：562826179 章节列表 GCN A new model for learning in graph domains The graph neural network model Spectral networks and locally connected networks on graphs Convolutional networks on graphs for learning molecular fingerprints Gated graph sequence neural networks Accelerated filtering

Unmarshal remaining JSON after performing custom unmarshalling

由 你离开我真会死。 提交于 2021-02-10 23:37:43
问题 I have a JSON object That contains an implementation of an interface within it. I'm attempting to take that JSON and marshal it into a struct whilst creating the implementation of the interface. I've managed to get it to implement the interface with a custom JSON unmarshal function however I'm struggling to piece together how to then marshal the rest of the fields I've created an example in the Go playground https://play.golang.org/p/ztF7H7etdjM My JSON being passed into my application is {

How to extend go-yaml to support custom tags

由 牧云@^-^@ 提交于 2021-02-10 22:19:08
问题 I have spent some time reading the code and docs of go-yaml, but I have not found any way to do this, except forking the project.. I want to extend the YAML unmarshaller so that it can accept a custom YAML tag ( !include <file> in this case), which in turn would allow me to add support for including files. This is easily implemented with other YAML libraries, like in this answer. Is there any way to accomplish this, using the public interface of the library (or another yaml library)? 回答1: Yes

How to extend go-yaml to support custom tags

由 拈花ヽ惹草 提交于 2021-02-10 22:18:26
问题 I have spent some time reading the code and docs of go-yaml, but I have not found any way to do this, except forking the project.. I want to extend the YAML unmarshaller so that it can accept a custom YAML tag ( !include <file> in this case), which in turn would allow me to add support for including files. This is easily implemented with other YAML libraries, like in this answer. Is there any way to accomplish this, using the public interface of the library (or another yaml library)? 回答1: Yes

Golang XML: unmarshal ignores namespace

由 强颜欢笑 提交于 2021-02-10 18:50:37
问题 I'm implementing a service in our Go system that reads data from an external SOAP service. Now that I'm writing tests for it, I run into this issue: unable to unmarshal request body for testing: expected element type <soapenv:Envelope> but have <Envelope> If I dump my data, I have this: <soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope" xmlns:v2 [...] So I do have the correct namespace in the XML. For the record, this is the struct into which I'm trying to unmarshal the

Enumerating string constants with iota

由 给你一囗甜甜゛ 提交于 2021-02-10 18:48:38
问题 The following example defines a series of port numbers starting at 3333 using iota. package main import ( "fmt" ) const ( FirstPort = iota+3333 SecondPort ThirdPort ) func main() { hostAndPort := "localhost:"+fmt.Sprint(SecondPort) fmt.Printf("%s", hostAndPort ) // Output: // localhost:3334 } When combining hostname and ports, I'd like to avoid having to wrap the port constant in fmt.Sprint and simply write, for example, "localhost:"+SecondPort . Is there a way to use iota to define the port
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