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Docs file (Input File) Mary had a little lamb its fleece was white as snow and everywhere that Mary went the lamb was sure to go. Hive Query CREATE TABLE FILES (line STRING); LOAD DATA INPATH 'docs' OVERWRITE INTO TABLE FILES; CREATE TABLE word_counts AS SELECT word, count(1) AS count F...

When reading a potentially large file, a while loop has a significant memory advantage over foreach. The following will read the file record by record (by default, "record" means "a line", as specified by $/), assigning each one to $_ as it is read: while(<$fh>) { pri...

If you have a list in memory already, the straightforward and usually sufficient way to process it is a simple foreach loop: foreach my $item (@items) { ... } This is fine e.g. for the common case of doing some processing on $item and then writing it out to a file without keeping the data ...

Amazon Linux is a RHEL variant, so the Red Hat instructions should work for the most part. There is, however, at least one discrepancy. There was an instance where the python27-devel package, as opposed to python-devel, was explicitly necessary. Here, we will install from source. sudo yum -y upd...

There are many fine ways to get this done, which others have already suggested. Following along the "get Excel data via SQL track", here are some pointers. Excel has the "Data Connection Wizard" which allows you to import or link from another data source or even within the very ...

php artisan make:request StoreUserRequest php artisan make:request UpdateUserRequest Note: You can also consider using names like StoreUser or UpdateUser (without Request appendix) since your FormRequests are placed in folder app/Http/Requests/.

[Test] public void Calculator_Add_ReturnsSumOfTwoNumbers() { Calculator calculatorUnderTest = new Calculator(); double result = calculatorUnderTest.Add(2, 3); Assert.AreEqual(5, result); }

Given this simple class, we can test that the ShaveHead method is working correctly by asserting state of the HairLength variable is set to zero after the ShaveHead method is called. public class Person { public string Name; public int HairLength; public Person(string name, in...

Sometimes it is necessary to assert when an exception is thrown. Different unit testing frameworks have different conventions for asserting that an exception was thrown, (like NUnit's Assert.Throws method). This example does not use any framework specific methods, just built in exception handling. ...

docker network create -o "com.docker.network.bridge.enable_icc"="false" icc-restricted Blocks Containers accessing other containers on the same icc-restricted network. Does not block Access to host running docker daemon Local LAN Internet

iptables -I INPUT -i docker0 -m addrtype --dst-type LOCAL -j DROP Blocks Access to host running docker daemon Does not block Container to container traffic Local LAN Internet Custom docker networks that doesn't use docker0

docker network create --subnet=192.168.0.0/24 --gateway=192.168.0.1 --ip-range=192.168.0.0/25 local-host-restricted iptables -I INPUT -s 192.168.0.0/24 -m addrtype --dst-type LOCAL -j DROP Creates a network called local-host-restricted which which: Blocks Access to host running docker daem...

Cusom bindings should be registered by extending the current knockout bindingHandlers object.This is done by adding a new property to the object. ko.bindingHandlers.newBinding = { init: function(element, valueAccessor, allBindings, viewModel, bindingContext) { }, update: function(e...

Such Example is knowing wide spreading among PWAs (Progressive Web Applications) and in this example we're going to send a simple Backend like notification using NodeJS and ES6 Install Node-GCM Module : npm install node-gcm Install Socket.io : npm install socket.io Create a GCM Enable...

After succesfully setup Spring-Boot application all the configuration is handled in an application.properties file. You will find the file at src/main/resources/. Normally there is a need to have a database behind the application. For development its good to have a setup of dev and a prod environme...

Make sure that the NodeJS plugin is enabled Select your run configurations (screen) Select + > Node.js Remote Debug Make sure you enter the port selected above as well as the correct host Once those are configured simply run the debug target as you normally would and it will...

If you are using Sublime Text 3 then the simplest way to install Package Control is to select Install Package Control in the Tools menu or in the Command Palette and Sublime Text will install it automatically. Manually Installing: For Sublime Text 2, older versions of Sublime Text 3, or if you hav...

In order to run Elasticsearch, a Java Runtime Environment (JRE) is required on the machine. Elasticsearch requires Java 7 or higher and recommends Oracle JDK version 1.8.0_73. So, be sure if you have Java in your system. If not, then follow the procedure: # Install wget with yum yum -y install w...

The best way to install and configure a Symfony2 project is described in the official documentation as follows: Mac OS X / Linux $ sudo curl -LsS http://symfony.com/installer -o /usr/local/bin/symfony $ sudo chmod a+x /usr/local/bin/symfony Windows c:\> php -r "file_put_contents('sym...