cyber irb

Use C ++ to compile Ruby program extension tutorials. One of Ruby's coolest features is to extend it using the application programming interface (API) defined in C/C ++. Ruby provides the C header file ruby. h, which is accompanied by many features that can be used to create Ruby classes, modules, and more. In addition to header files, Ruby also provides several other high-level abstractions to expand ruby built based on local Ruby. h. This article will introduce Ruby Interface for C ++ Extensio

to the function as a closure. The closure is to wrap the functions and variables to extend the life cycle of the variables. Array 2.3 animals = ['lions', 'tigers', 'bears']puts animals[1]puts animals[-1]puts animals[0..1] The above code has a syntactic sugar.-1 indicates that the last-to-last element is returned. Of course, 1 indicates the second element, just like other languages. Animals [0 .. 1] uses the interval learned yesterday to indicate the elements from 0 to 1.

Ruby gives us six ways to complete a task when we encounter the need to invoke the operating system shell command: 1.Exec Method: The Kernel#exec method replaces the current process example by invoking the specified command: Copy Code code as follows: $ IRB >> exec ' echo ' Hello $HOSTNAME ' Hello nate.local $ It is noteworthy that the Exec method replaces the IRB process w

way to use the filter is to first put the deepest IRD, and then place the camera on the nightshot and Automatic Exposure files. Then you can see your exposure time, if it is between 1/30-1/60. Then you can take a video. If the time is lower than 1/30, it indicates that this filter is relatively deeper than the current situation. Please change it to an IRC. Similarly, you can change it to an IRB. If not, it indicates that the current environment is ve

: IRB (main): 045: 0> bankaccount. getinterestrate=> 6.5 In fact, the "new" method used to create a class instance is a class method. Therefore, when you enter "rectangle. New" in the program, you actually call the new class method-this is provided by ruby by default. 　　Inheritance One of the principles of object-oriented programming is to support class hierarchies. Just like the categories of things in nature, classes allow inheritanc

call a method, * No: If the last expression on the left contains *, the redundant elements on the right are substituted into the expression with * as an array. If there are no redundant elements on the right, the empty array is substituted into it. * Foo = 1, 2, 3 # Foo = [1, 2, 3] Foo, * bar = 1, 2, 3 # Foo = 1; bar = [2, 3] * Variables used in method definition to indicate variable lengths: [From "programmingruby "] Variable-length argument lists But what if you want to pas

Go to Script/consle after upgrading Ruby and Rails: Copy Code code as follows: /usr/local/lib/ruby/1.8/irb/completion.rb:10:in ' require ': No such file to load-ReadLine (Loaderror) From/usr/local/lib/ruby/1.8/irb/completion.rb:10 From/usr/local/lib/ruby/1.8/irb/init.rb:252:in ' require ' From/usr/local/lib/ruby/1.8/

whether the command execution result is successful or failed. Copy codeThe Code is as follows:$ Irb> System 'echo "hello $ HOSTNAME "'Hello androidyue=> True> Puts $?Pid 11845 exit 0=> Nil> System 'false'=> False> Puts $?Pid 11858 exit 1=> Nil> System will assign the exit status code of the process to $ ?, If the program Exits normally, $? The value is 0, otherwise it is not 0. By checking the exit status code, we can throw an exception in the ruby s

=~/Black/}=> trueYou can also change a method: >> Provinces.keys.all? {|province, abbr| province =~/Mountain/}=> falseHash Each iteration of a hash, the hash will be yield into your code block, each time a key/value pair. Each pair is an array of two elements. Range >> r = range.new (1, 10)=> 1..10>> R.one? {|n| n = = 5}=> true>> R.none? {|n| n% 2 = 0}=> false>> r = Range.new (1.0, 10.0)=> 1.0..10.0>> R.one {|n| n = 5}Nomethoderror:undefined method ' One ' for 1.0..10.0:rangeDid you mean? O

Network security is a comprehensive, complex project, any network security measures can not guarantee foolproof. It is therefore essential that, in the case of some important sectors, the network is attacked, how to track cyber attacks, and to track down and bring to justice the attackers.Tracking cyber attacks is the source of the events that occur. It has two aspects meaning: One refers to the discovery o

%{ Include header file #include "test.h" %} Interface add int add (int,int); 2, the preparation of wrap documents Copy Code code as follows: Swig-c++-ruby test.i Get Test Package file Test_wrap.cxx 3, the preparation of test.h and Test.cxx Copy Code code as follows: Test.h #ifndef _test_test_h #define _test_test_h extern int Add (int,int); #endif Test.cxx #include "test.h" int add (int left,int right) { return left+ri

or failure. Copy Code code as follows: $ IRB > System ' echo ' Hello $HOSTNAME ' Hello Androidyue => true > puts $? PID 11845 Exit 0 => Nil > System ' false ' => false > puts $? PID 11858 exit 1 => Nil >> System assigns the status code of the process's exit to $, and if the program exits normally, the value of $ is 0, otherwise it is not 0. By detecting the exit status code we can throw an exception i

Ruby? Of course, Ruby has irb. Irb (main): 033: 0> dir = 'archives-dir' Irb (main): 034: 0> dst = 'your-destination-directory' Irb (main): 035: 0> num = 16 Irb (main): 036: 0> lines = 'LS-rt ~ /Downloads/| tail-n # {num} '. split ("\ n ")

Scott/tiger @ // 192.168.0.91/orcl SQL * Plus: Release 11.2.0.2.0 production on Fri Sep 23 04:39:08 2011 Copyright (c) 1982,201 0, Oracle. All rights reserved. Connected: Oracle Database 10g Enterprise Edition Release 10.1.0.2.0-Production With the partitioning, OLAP and Data Mining options SQL> Download oci8 installation link: http://ruby-oci8.rubyforge.org/en/, decompress the file, and run make and make install. Before run

the transaction cannot be recovered.Based on the transaction (), search: 000e. 002 to locate the following information:Dump of buffer cache at level 3 for tsn = 2 rdba = 12630748BH (0x1d9ef41a48) file #: 3 rdba: 0x00c0badc (3/47836) class: 44 ba: 0x1d84096000Set: 322 pool: 3 bsz: 8192 bsi: 0 sflg: 2 pwc:Dbwrid: 1 obj:-1 objn: 0 tsn: 2 afn: 3 hint: fHash: [0x2425e3c4e0, 0x2425e3c4e0] lru: [0x1d9ef41c70, 0x1d9ef41a00]Ckptq: [NULL] fileq: [NULL] objq: [0x1d9ef43b10, 0x2110560590] objaq: [0x1d9ef41

.00000162 seq: 0x105 cnt: 0x14 irb: 0x14 icl: 0x0 flg: 0x0000 Rec Offset Rec Offset Rec Offset Rec Offset Rec Offset---------------------------------------------------------------------------0x01 0x1f08 0x02 0x1e58 0x03 0x1df4 0x04 0x1da0 0x05 0x1d1c0x06 0x1ca0 0x07 0x1c54 0x08 0x1b80 0x09 0x1afc 0x0a 0x1a700x0b 0x198c 0x0c 0x1924 0x0d 0x18cc 0x0e 0x17e8 0x0f 0x17800x10 0x1728

Suddenly I found out that Ruby was good too, I was kind of thinking about learning Introduced This is a short introduction to Ruby and it takes only 20 minutes to complete the reading. This assumes that the reader has already installed Ruby, and if you are not installing it, please visit the official Ruby website for download and installation before reading. Interactive Ruby Open irb (interactive ruby Shell): If you are using Mac OS X, open the Ter

Illinois State Rolin Medos--(American business information)--InternationalInformationThe Audit Association (ISACA) today announced the launch of a newInternetSecurity certification portfolio, combining skills training with hands-on exams and certifications for the first time. These seven new cybersecurity Nexus (CSX) certifications help professionals plan and develop their careers in changing areas while helping employers make up for skills gaps. Global knowledge, the leading provider of it and

Machine learning is accelerating the pace of progress, it is time to explore this issue. Ai can really protect our systems in the future against cyber attacks. Today, an increasing number of cyber attackers are launching cyber attacks through automated technology, while the attacking enterprise or organization is still using manpower to summarize internal securi

Opening Empty is the color, and the color is empty.Empty and empty, in the Ruby language, everything is an object. Ruby is an object-oriented language (object oriented Language), and the object-oriented concept is much more robust than other languages. The raw type data and object type data in Java are not present in Ruby. Most of the stuff in Ruby is an object. So, to master the metaprogramming of Ruby and Ruby, the object is the first compulsory lesson. This is the time to focus on the obj