1, >>> myteacher = ' big '
>> Yourteacher = Myteacher>> myteacher = ' small '>> Print (Yourteacher)→bigWrong answer: Myteacher
2, >>> first = 100
>> second = ' 100 '>> first = Second>> Print (first)→100Wrong answer: ' 100 '
3, in addition to the escape, there is no way
>>STR = "Let ' s go!">>print (str)→let ' s go!Double quotes and three quotation marks ("" "..." "" ") can contain single quotes, and three quotation marks (" ... ") can contain double quotes without escaping
Summary
As to the classification problem, we often need to analyze the experiment result through the visual confusion matrix to get the parameter idea, this article describes how to use Python to draw the confusing matrix (Confusion_matrix), this article only provides the code, gives the necessary annotation. Code
#-*-coding:utf-8-*-from sklearn.metrics import confusion_matrix import matplotlib.pyplot as PLT import NumPy as NP #lab Els shows you diff
open source for someone else's code.
To improve the user experience, the advent of Web 2.0 technology, and with AJAX and rich interface technology, JavaScript in the importance of Web applications more and more high, JavaScript code complexity, functionality and technical content is increasing, the JavaScript The need for code protection is also becoming increasingly urgent.
The purpose of the JavaScript online obfuscation is to provide a new compreh
someone else's code. To improve the user experience, the advent of Web 2.0 technology, and with AJAX and rich interface technology, JavaScript in the importance of Web applications more and more high, JavaScript code complexity, functionality and technical content is increasing, the JavaScript The need for code protection is also becoming increasingly urgent. The purpose of the JavaScript online obfuscation is to provide a new comprehensive solution
Original text: String obfuscation technology application design a string obfuscation program can be confusing. NET assembly strings in theThere are currently two articles on the study of strings. Principle: string obfuscation techniques in. NET program protection and how to decrypt the obfuscated string Practice: String anti-aliasing actual combat Dotfuscator 4.9
Free. Net obfuscation and decompilation tools
I. netCodeObfuscation
. Net code obfuscation technology:
Symbol renaming
String encryption and Compression
Resource encryption and Compression
Constant literals pruning
Method signatures overload Induction
Class hierarchy linerization
Code control flow Obfuscation
Assemblies merging and emb
There are currently two articles on string research.
Principles: Application of string obfuscation Technology in. Net Program protection and how to decrypt obfuscated strings
Practice: String anti-obfuscation practices dotfuscator 4.9 string encryption technology Countermeasures
The third article is about how to apply the content learned above and design a string obfusc
Android code obfuscation causes problems, fast locating, and android ObfuscationProblems caused by code obfuscation and quick locating
During code obfuscation and packaging, the third-party libraries used and the conventional android obfuscation and shielding are blocked, but the generated apk will crash during running
2-step code obfuscation and 2-step code obfuscation
[Step 1 ]:
Modify build. gradle under moduleBuildTypes {Release {// Whether to confuseMinifyEnabled true// Location of the obfuscated File// Proguard is a free tool for compressing, optimizing, and confusing Java bytecode filesProguardFiles getDefaultProguardFile('proguard-android.txt '), 'proguard-rules. Pro'}}
[Step 2 ]:
Add in proguard-rules.pro:# Speci
Code obfuscation in Android development and android development Obfuscation
1. Start the obfuscation switch.In the project. properties file under the project directory, it is named as the proguard. config tag. By default, it is disabled. Open it. 2. perform obfuscation ConfigurationPerform specific
To prevent code decompilation, You need to confuse the code before exporting the signature. Recently, I found that a project of my own encountered an exception in code obfuscation. The following are some of my experiences in solving code obfuscation and introducing third-party jar packages that may cause obfuscation in the past few days:
1.
Code obfuscation in Android is typically proguard. It has many other useful functions besides confusing the code. The main record here is confusing related implementations.The role of 1.ProGuardDelete useless code, compress and optimize class file, reduce the size of apk;Improve the reverse threshold to protect code security;Use of 2.ProGuardEclipseBefore Android2.3, the obfuscation code would need to be ma
Afinal jar package for code obfuscation error, afinaljar code obfuscation
Code obfuscation is used today. After the obfuscation, the APP cannot run and an error is reported. Because the project only uses the third-party libraries of Afinal, the answers provided on the Internet are used to avoid
Android implementation code obfuscation and android code obfuscation
For signed apk, you can still view the Code Implementation of the class file after decompilation. for decompilation, you can view your blog and click the open link.
This conventional decompilation fails when code obfuscation is used.
1, added in build. grandle, where rules are written in the pro
Code obfuscation and App obfuscation in app security
Refer:
Http://www.cnblogs.com/sunzn/archive/2013/03/06/2946952.html
Http://www.apkbus.com/android-240707-1-1.html
1. Find in the project root directoryProject. propertiesFile, remove the circled code comments, that is, declare that our obfuscation file isProguard-project.txt:
2. Find in the project root dire
In the morning, you need to modify a js file and find that it has been obfuscated. If there is any "source code", and no suitable tool has been found on the internet for anti-obfuscation, you have studied and sorted out the following two methods:
[Method 2 without using tools]
Method 1: Use the IE Developer tool (IE 8 has already come with it, and IE Developer Toolbar needs to be downloaded and installed before IE7) for anti-
Android project code obfuscation and android project Obfuscation
The project root directory has two files:
1. project. properties
# This file is automatically generated by Android Tools.# Do not modify this file -- YOUR CHANGES WILL BE ERASED!## This file must be checked in Version Control Systems.## To customize properties used by the Ant build system edit# "ant.properties", and override values to adapt
Java obfuscation and Java Obfuscation
Differences between HashMap and HashTable in Java
① Historical reasons: Hashtable provides the obsolete Dictonary class, And HashMap is an implementation of the Map interface introduced by Java1.2.
② HashMap allows empty key-value pairs, whereas HashTable does not.
③ HashTable synchronization, but HashMap non-synchronization, is more efficient than HashTable
Briefly de
Jquery selector obfuscation (1); jquery selector Obfuscation
Summary: I was not familiar with jquery's selector. After many tests today, I have some answers to the confusion.
The quotation marks are separated by spaces to indicate selection.Internal elements of the previous ElementWithout spaces, all content is used to select the same (class) element.
For example, $ (". a. B") isClass = "a B",
$ (". A. B")
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