__func__

Spark conversion (transform) and Action (action) list. The following func, most of the time, to make logic clearer, we recommend using anonymous functions! (lambda) "" "Ps:java and Python APIs are the same, names and parameters are unchanged." Transform meaning Map (func) Each INPUT element is exported after a Func function conversion and output an element filter (func) returns the value returned after the Func function evaluates to The input element of true is composed of ...

Related articles: teach you 30 seconds to build strong type ASP.net data binding, strongly typed ASP.net data binding improved version 2nd read the dragonpig wrote "teach you 30 seconds to build strong type ASP.net data binding," a bright, is too much to force, the original can also be data binding. Immediately a small try, and made some improvements, has now been applied to the news column in the home. 　　Let's share some of the improvements. With the traditional asp.net data-binding approach, there are two places where people don't ...

First, the association Spark and similar, Spark Streaming can also use maven repository. To write your own Spark Streaming program, you need to import the following dependencies into your SBT or Maven project org.apache.spark spark-streaming_2.10 1.2 In order to obtain from sources not provided in the Spark core API, such as Kafka, Flume and Kinesis Data, we need to add the relevant module spar ...

You can implement your own blockchain with less than 200 lines of Go code! Sounds interesting? What better way to learn than to develop a blockchain of your own? Then let's practice together!

Overview WEB attack is the mainstream technology of hacker attacks for more than a decade. The domestic manufacturers have long regarded WAF as the standard of security infrastructure. There are many security vendors in the market that offer WAF products or cloud WAF services. For the lack of their own security team, but also suffer from sql injection, xss, cc and other WEB attacks in the small and medium enterprises, the demand for WAF is also very urgent. WAF access to the current are the following: WAF products to buy security vendors using the cloud waf service, the domain name of the DNS server is set to cloud waf manufacturers to provide, or ...

Code version: Spark 2.2.0 This article mainly describes a creator running process. Generally divided into three parts: (1) sparkconf creation, (2) Sparkcontext creation, (3) Task execution. If we use Scala to write a wordcount program to count the words in a file, package Com.spark.myapp import Org.apache.spark. {Sparkcontext, Spar ...

Related articles: teach you 30 seconds to create a strong type ASP.net data binding, strongly typed ASP.net data binding improved version before the method has a problem: Ivony ... "It's not good to write an eval method for each type," says one. Kingthy said: "So there are func everywhere, will it be too far?" Li Yongjing said: "The method to be used anywhere in the project should be collected in the core-level DLL as an extension method." "If we solve this problem with the extension method, we will face a new ...

Seed7 is a higher-level open source general-purpose programming language than Ada, c++++ and Java, designed and developed by Thomas Mertes. Seed7 's new statements and operators can be easily compiled, with the same type of results and type parameters more elaborate than the concept of a template or generic. Its salient features are object-oriented, although Seed7 contains some concepts of other programming languages, but it has many different features from other programming languages, including: as an extensible programming language, it supports user-defined statements and operations. ...

Data binding seems to be ASP.net's oldest program, nothing more than an eval stream. In fact, a little processing can make it anew. Add in code://Recommended in base class protected virtual object exphelper<tentity, tresult> (func<tentity, tresult> Func) {var itm = Getdataitem (); Return f ...

Editor's note: The last period of time reproduced in the "5 minutes to understand docker! "Very popular, a short 1500 words, let everyone quickly understand the Docker." Today, I saw the author make a new novel, and immediately turned over. The reason to call this code reading as a fantasy trip is because the author Liu Mengxin (@oilbeater) in the process of reading Docker source, found a few interesting things: from the code point of view Docker did not start a new development mechanism, but the existing tested isolation security mechanism to use the full use, Including Cgroups,c ...