Tutorial by Examples: f

This consumer is a low-level tool which allows you to consume messages from specific partitions, offsets and replicas. Useful parameters: parition: the specific partition to consume from (default to all) offset: the beginning offset. Use -2 to consume messages from the beginning, -1 to consume ...

This tool allows you to list, describe, or delete consumer groups. Have a look at this article for more information about consumer groups. if you still use the old consumer implementation, replace --bootstrap-server with --zookeeper. List consumer groups: kafka-consumer-groups --bootstrap-s...

import gzip import os outfilename = 'example.txt.gz' output = gzip.open(outfilename, 'wb') try: output.write('Contents of the example file go here.\n') finally: output.close() print outfilename, 'contains', os.stat(outfilename).st_size, 'bytes of compressed data' os.system('file...

In Unit Test layer we usually test the Business Layer functionalities. And in order to do this, we will remove the Data Layer (Entity Framework) dependencies. And the question now is: How can I remove the Entity Framework dependencies in order to unit test the Business Layer functions? And the ans...

After installing Visual studio code configure .net core and C#. Configure C# based on market-place. Reference Url: C# market place .net core Launch Visual studio code. Press [ctrl + P] paste "ext install csharp" this and hit. Once done above steps , C# extension available i...

In our AppServiceProvider.php public function boot() { HasMany::macro('toHasOne', function() { return new HasOne( $this->query, $this->parent, $this->foreignKey, $this->localKey ); }); } Suppose we have shop modal and ...

The MSDN library contains several different types of documentation which can be used for implementing features. Topic Overviews These are broad overviews of topics intended to provide a general understanding of an API. These overviews also often outline best practices, and implementation strategi...

Finding documentation for a feature is often as simple as a search using a good search engine. If that fails, or if unsure about specific terms, the Windows API Index can help locate specific features. Documentation for methods, interfaces, enumerations and constants can usually be found by searchin...

The documentation for a function is broken down into several sections: Overview Describes what the function is used for. This section will also show information about whether the function is depreciated, or may be unavailable in future versions. Syntax Shows the declaration of the function from ...

FlinkKafkaConsumer let's you consume data from one or more kafka topics. versions The consumer to use depends on your kafka distribution. FlinkKafkaConsumer08: uses the old SimpleConsumer API of Kafka. Offsets are handled by Flink and committed to zookeeper. FlinkKafkaConsumer09: uses the new ...

As explained in the docs, With Flink’s checkpointing enabled, the Flink Kafka Consumer will consume records from a topic and periodically checkpoint all its Kafka offsets, together with the state of other operations, in a consistent manner. In case of a job failure, Flink will restore the streami...

In kafka, each consumer from the same consumer group gets assigned one or more partitions. Note that it is not possible for two consumers to consume from the same partition. The number of flink consumers depends on the flink parallelism (defaults to 1). There are three possible cases: kafka pa...

set and multiset have default compare methods, but in some cases you may need to overload them. Let's imagine we are storing string values in a set, but we know those strings contain only numeric values. By default the sort will be a lexicographical string comparison, so the order won't match the n...

The most obvious method, if you just want to reset your set/multiset to an empty one, is to use clear: std::set<int> sut; sut.insert(10); sut.insert(15); sut.insert(22); sut.insert(3); sut.clear(); //size of sut is 0 Then the erase method can be used.  It offers some poss...

@* Adds AJAX functions support to a form. * The innerHTML of "target-element" is replaced by the result of SomeAction. *@ @using ( Ajax.BeginForm("SomeAction", "SomeController", new AjaxOptions { UpdateTargetI...

Create an F# console application. Change the Output type of the application to Windows Application. Add the FsXaml NuGet package. Add these four source files, in the order listed here. MainWindow.xaml <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" ...

This iteration changes a value from a starting point to an end, optionally by a specified value for each step. The default change is 1. DEFINE VARIABLE i AS INTEGER NO-UNDO. DO i = 10 TO 15: DISPLAY i WITH FRAME x1 6 DOWN . DOWN WITH FRAME x1. END. Result: ---------------i ...

Imagine you're testing code that makes a call to this interface, and you want to make sure your retry code is working. public interface DataStore { void save(Data data) throws IOException; } You could do something like this: public void saveChanges_Retries_WhenDataStoreCallFails() { ...

import numpy as np import matplotlib.pyplot as plt # create some data x = np.arange(-2, 20, 0.5) # values of x y1 = map(lambda x: -4.0/3.0*x + 16, x) # values of y1(x) y2 = map(lambda x: 0.2*x**2 -5*x + 32, x) # svalues of y2(x) fig = plt.figure() ax1 = fig.add_subplo...

Import ReactiveFormsModule, and then import { Component, OnInit, OnDestroy } from '@angular/core'; import { FormControl } from '@angular/forms'; import { Subscription } from 'rxjs'; @Component({ selector: 'component', template: ` <input [formControl]="control" /> ...