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如何在 Binarium 中注册和验证帐户

Quick tutorial to show you how to install PyCharm in Ubuntu and Ubuntu derivatives such as Linux Mint, elementary OS, Linux Lite etc.
PyCharm is an IDE for Python development and has been considered as one of the best Python IDE by the experts. The IDE comes in professional and community edition. The community edition is free of 如何在 Binarium 中注册和验证帐户 cost, but professional edition has more features. We shall see the installation procedure of both community and professional edition in this tutorial.

如何在java中反转数组

If you have a few years of experience in the Java ecosystem, and you're interested in sharing that experience with the community (and getting 如何在 Binarium 中注册和验证帐户 paid for your work of course), have a look at the "Write for Us" page. Cheers, Eugen

1. Overview

In this quick article, we'll show how we can invert an array in Java.

We'll see 如何在 Binarium 中注册和验证帐户 a few different ways to do this using pure Java 8-based solutions 如何在 Binarium 中注册和验证帐户 – some of those mutate an existing array and some create a new one.

Next, we'll look at two solutions using external libraries — one using Apache Commons Lang and one using Google Guava.

2. Defining 如何在 Binarium 中注册和验证帐户 the Problem

The basic idea is to reverse the order of the elements in the array. So, if given the array:

We'd like to get:

Let's see some ways we can do that.

3. Using a Traditional for Loop

The first way we might think about 如何在 Binarium 中注册和验证帐户 to invert an array is by using a for loop:

As we can see, the code iterates through half of the array, changing the 如何在 Binarium 中注册和验证帐户 elements in symmetric positions.

We use a temporary variable so that we don't lose the value of the current position of the array during the iteration.

4. Using Java 8 Stream API

We can also invert an array by using the Stream API:

Here we use the method IntStream.range to generate a sequential stream of numbers. Then we 如何在 Binarium 中注册和验证帐户 map this sequence into array indexes in descending order.

5. Using Collections.reverse()

Let's see how to invert an array using the Collections.如何在 Binarium 中注册和验证帐户 reverse() method:

Compared with the previous examples, this is a more readable way to do the task.

6. Using Apache Commons Lang

Another option to invert an array is to use the Apache Commons Lang library. To use it, we must first include the library as a dependency:

The latest version of Commons Lang can be found at Maven Central.

Let's use the ArrayUtils class to invert the array:

As we can see, this solution is quite simple.

7. Using Google Guava

One more option is to use the Google Guava library. Just as we did with the Commons Lang, we'll include the library as a 如何在 Binarium 中注册和验证帐户 dependency:

The latest version can be found at Maven Central.

Then, we 如何在 Binarium 中注册和验证帐户 can use the reverse method in Guava's Lists class to invert the array:

8. Conclusion

In this article, we looked at several different ways to invert an array in Java. We showed a few solutions 如何在 Binarium 中注册和验证帐户 using only core Java and two other solutions that use third-party libraries — Commons Lang and Guava.

All the code samples shown here can be found on GitHub — this is a Maven project, so it should be easy to import and run as it is.

How to setup IKEv2 VPN on Mac OS X

IKEv2 protocol is a part of IPsec protocol suite and is used to create a reliably protected VPN connection. Distinctive feature of IKEv2 is the ability to automatically reestablish VPN tunnel connection in case of a temporary VPN disconnect which is a useful feature for mobile users. Another IKEv2 advantages are an easy setup process and no need to use additional software.

Use our guide to quickly setup VPN connection with IKEv2 protocol on your Macbook or iMac and you will be able to use Internet anonymously and protect your data from hackers' interception while using public Wi-Fi hotspots.

代码先锋网 代码片段及技术文章聚合

Quick tutorial to show you how to install PyCharm in Ubuntu and Ubuntu derivatives such as Linux Mint, elementary OS, Linux Lite etc.
PyCharm is an IDE for Python development and has been considered as one of the best Python IDE by the experts. The IDE comes in professional and community edition. The community edition is free of cost, but professional edition has more features. We shall see the installation procedure of both community and professional edition in this tutorial.

Method 1: Install PyCharm in Ubuntu using umake

Ubuntu provide a wonderful command line tool, umake for developers. umake lets you easily install a number of development tools 如何在 Binarium 中注册和验证帐户 in Ubuntu such as Android Studio, Visual Studio Code, Ubuntu SDK, Eclipse, Arudino Software Distribution etc. PyCharm is also one of the development tools included in the umake.

To install PyCharm using umake, you need to have umake first. Normally, it should already be installed in your system, but if it is not, use the PPA below to get the latest stable version of umake:

Once you have umake, use the command below to install PyCharm Community Edition in Ubuntu:

To install PyCharm 如何在 Binarium 中注册和验证帐户 如何在 Binarium 中注册和验证帐户 Professional Edition (you need license for this), you can use the command below:

To remove PyCharm installed via umake, use the command below:

Method 2: Install PyCharm in Ubuntu and Linux Mint using PPA

We’ll be using an unofficial PPA to easily install PyCharm in Ubuntu. I am using Ubuntu 15.04 but this PPA is also available for Ubuntu 如何在 Binarium 中注册和验证帐户 如何在 Binarium 中注册和验证帐户 如何在 Binarium 中注册和验证帐户 如何在 Binarium 中注册和验证帐户 14.04. You can use the same method to install PyCharm in 如何在 Binarium 中注册和验证帐户 Linux Mint 17, elementary OS Freya and other Ubuntu based Linux distributions. PyCharm uses Java so make sure to install Java in Ubuntu beforehand.

Open a terminal and use the following commands:

To install the community edition of PyCharm, use the command below. It will download data of around 120 MB.

To install the professional edition of PyCharm, use the command below. It will download data of around 160 MB.

Once installed, go to Unity Dash and search for PyCharm and you should be able to see it running. This is what it looked like 如何在 Binarium 中注册和验证帐户 on my Ubuntu 15.04:

Remove PyCharm

To uninstall PyCharm installed by the above described method, use the command below to uninstall the community edition of PyCharm:
sudo apt-get remove pycharm-community

To remove the professional version, use the command below:
sudo apt-get remove pycharm

Afterward, use the command below to remove the PPA from the sources list:
sudo add-apt-repository --remove ppa:mystic-mirage/pycharm

That’s all you need to do. I hope this tutorial helped you to install PyCharm in Ubuntu Linux. Any questions or suggestions are always welcomed.

How to setup OpenVPN on iOS

To set up a OpenVPN connection on iPhone smartphone or iPad tablet you need to install free app OpenVPN Connect from App Store. Next, you need to import into the application a configuration files that were sent to your email address after order a subscription.

See our guide how to import a configuration files via 如何在 Binarium 中注册和验证帐户 如何在 Binarium 中注册和验证帐户 free app iZIP. You may also import files via iTunes - see tips here.

Setting up OpenVPN on iOS, step 1

Setting up OpenVPN on iOS, step 2

After paying the order you will receive by email an archive with configuration files. Open zip file and tap on Preview content.