Many technologies will be learned in the big data learning process, but Scala is undoubtedly essential. How can we quickly understand Scala in the big data technology learning process, I want to learn more about this and thank you for the detailed materials provided by Mr. Yu from codo big data.
As we all know, spark supports four languages: R, Python, Java, and Scala
This article first describes how to configure the Maven+scala development environment in Eclipse, and then describes how to implement the spark local run. Finally, the spark program written by Scala is successfully run.
At first, my Eclipse+maven environment was well configured.
System: Win7
Eclipse version: Luna release (4.4.0)
MAVEN is installed from the Eclipsemarket, as shown in Figure 1.
When the Ecli
The first step: learning to use the Scala interpreterThe easiest way to start Scala is to use the Scala interpreter, which is an interactive "shell" that writes Scala expressions and programs. Scala needs to be installed before using S
1. Text Format
// Create a new font
LOGFONT log; // struct variable
CFont font; // font object
// Set attributes
Log. lfCharSet = ANSI_CHARSET;
Log. lfClipPrecision = 23; // specifies the font cropping precision.
Log. lfEscapement = 0; // the tilt of the font relative to the
Generally, a class corresponds to an associated object, and its method is the same as the static method in Java. For example, the bigint companion object of the bigint class has a method probableprime that generates random prime numbers of specified digits, run the following code in repl:
Object helloworld {def main (ARGs: array [String]) {for (I
The result is as follows:
523977839911977593599809809883 process finished with exit code 0
In my estimation, it may be the
I do think that the school of Computer Science should open a Scala language course.In this article, I'll tell you why I have this idea, and before that, there are a few things I would like to declare first:This article does not intend to evaluate the programming language, I want to tell the subject is why you should learn Scala. 51CTO has published an article about why Java programmers are learning
...McbuilderIf % errorlevel % = 1 echo failed to replace the file. Do not open anyProgramTry again or run on the English interfaceIf % errorlevel % = 1 pauseIf % errorlevel % = 0 echo "XP ""is installed successfully and takes effect only after it is restarted.Echo.Press any key to exit echo.Pause> NUL
2. restart the system. This is where the system may display a problem (because does not ). Do not be afraid. Save the following content as a batch and run it as Administrator:Cd c:/Windows/FontsD
What are the differences between functions and methods in Scala?
A method can appear as a part of an expression (call a function and pass a parameter), but a method (with a parameter) cannot be used as the final expression,
However, the function can be used as the final expression:
Scala> // define a method Scala> def M (X: INT) = 2 * XM: (x: INT) intscala> //
default
-
Major
-
Mode
'
C-mode); Use the text mode once enabled.
20
(
Global
-
Font
-
Lock
-
Mode t); syntax highlighting
21
(Auto
-
Image
-
File
-
Mode t); enable the image display function
22
(Tool
-
Bar
-
Mode nil); remove the large Toolbar
23
(Fset
'
Yes-or-no-P
'
Y
-
Or
-
N
-
P); Use y
/
N instead of yes
/
No
24
(Scroll
-
Bar
-
Mode nil); no
For the Web front-end page development, font size settings are more important, here to find some information about the size of the data, shared out for later reference, but also hope to be useful to everyone!
Points Pixels Ems Percent
6pt 8px 0.5em 50%
7pt 9px 0.55em 55%
7.5pt 10px 0.625em 62.5%
8pt 11px 0.7em 70%
9pt 12px 0.75em 75%
10pt 13px 0.8em 80%
10.5pt 14px 0.875em 87.5%
11pt 15px 0.95em 95%
12pt 16px 1em 100%
13pt 17px 1.05em 105%
13.5pt 18
Web font @ font-face for Chinese fonts, web @ font-face
Today is just getting started with the blog park, and I feel very fresh.A blog is displayed on the homepage.Http://www.cnblogs.com/liuminghai/p/4238256.htmlIt's about web text. It's pretty good.However, the front-end of B/S all hate Chinese fonts. Because it is very large, at least 2 MB or more, I have seen
Preface
Scala is a language designed to implement scaleable language. Officially, it is called the hybrid language of object-oriented language and functional language. In addition, Scala can work with JavaProgramSeamless stitching, because Scala files are compiled into. class files and run on JVM. However, what I care more about is itsScaleable ). What is scala
The Java version of the spark Big Data Chinese word Segmentation Statistics program was completed, and after a week of effort, the Scala version of the sparkBig Data Chinese Word segmentation Statistics program also made out, here to share to you want to learn spark friends.The following is the final interface of the program, and the Java version is not very different:The following is the Scala engineering
Java version of the spark large data Chinese word segmentation Statistics program completed, after a week of effort, the Scala version of the spark
Large data Chinese Word segmentation Statistics program also got out, here to share to you want to learn spark friends.
The following is the final operation of the program screen screenshot, and the Java version of the difference is not:
The following is the Scala
Soon after I wrote "I also talked about using Scala language (on) on the. NET platform" on the Lenovo ThinkCentre m4000t desktop in my Ubuntu 9.10 operating system, I went home from work. As a result, I will continue to work on the Windows Vista operating system on the Dell migration 1520. First, start sun virtualbox to open a Ubuntu 9.10 operating system. Scala SDK package has not been installed in the Ubu
How to build a spark development environment using MAVEN step-by-step in IntelliJ idea, and write a simple wordcount instance of Spark based on Scala.
1. Preparatory workFirst you need to install JDK and Scala and development tools on your computer IntelliJ idea, this article uses the Win7 system, the environment is configured as follows:
Jdk1.7.0_15scala2.10.4
Scala
PrefaceThis article is mainly about Scala's array, Bufferarray, List, more tutorials Please refer to: Scala tutorial
This article summarizes the knowledge pointsIf the length is fixed, use array, if the length may vary, use Arraybuffer to provide the initial value, do not use new, the complex object array does not provide the initial value when you must provide new () to access the element with for (Elem Array
1, fixed-length array definition:
Define
Blog Core content:1. Two implicit conversion mechanisms in Scala and how implicit views are defined2. Where the implicit binding in Scala might be located and how to use implicit conversions better3. Implicit conversion related operation rules in Scala4. Implicit parameters in Scala5. Implicit classes in Scala6. An implicit object in Scala7. Two implicit type constraints in
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.