Source code analysis of javaslist in Java Collection series, and javaslist source code
In the previous article, we analyzed the underlying implementation of ArrayList and learned that the underlying implementation of ArrayList is based on arrays. Therefore, it has the characteristics of fast search modification and slow insertion and deletion. The sort List intro
LinkedHashMap source code analysis of Java Collection series, linkedhashmap source code
In this article, we started to analyze the source code of LinkedHashMap. LinkedHashMap inherits HashMap, which means that LinkedHashMap is extended on the basis of HashMap. Therefore, before reading the source
PHP tags, keywords, classes, numbers, and lexical source code for PHP lexical parsing source code analysis
I have never engaged in web applications before. Recently I want to study webshell and find that php syntax is too weird. I just want to look at the PHP kernel lexical analysis
Note: The following source code is based on jdk1.7.0 _ 11
The Set set is actually an encapsulation of the map set. The map set stores key-value pairs, So we hide the values and do not expose them to the outside world. This forms the Set set.Corresponding to two very important implementations of the map set hashmap (based on the hash table), treemap (based on the red and black trees), the Set set also corresponds to two classes of hashset and treeset
Performance optimization in software development is a very important issue for programmers . A small problem can become a bottleneck for a large system. But it is very difficult for programmers to optimize their code by themselves. Fortunately, there are some great tools that can help programmers with code analysis and performance testing, making it much easier f
Java Collection: HashMap source code analysis, hashmap source code1. HashMap Overview
HashMap is implemented based on the Map interface of the hash table. This implementation provides all optional ing operations and allows the use of null values and null keys. (Except for not synchronizing data and allowing null, The HashMap class is roughly the same as that of Hashtable .) This class does not guarantee the
DBUtils source code analysis, dbutils source code
In fact, in this article, I only analyzed the operation process of dbutis query.
As for why the class should be designed in this way, the design patterns and other advanced knowledge points should be discussed in the next section.
First, let's take a look at how the simplest DBUtils works.There is a table in the d
From the source code analysis java Collection [HashMap], the source code javahashmap
As we know, Map stores key-value pairs. Its basic unit is to implement Node
static class Node
You can see its function by looking at the definition. It stores an object next to the next node. Therefore, we can probably think of its s
MVC source code analysis, mvc source code
As shown in the previous article, there are four filters for program execution:
Filter Type
Interface
Description
Authorization
IAuthorizationFilter
This type (or filter) is used to restrict a behavior method to the Controller or controller.
Exception
IExceptionFilter
Specifies
converted to: (the code is incorrect. I have used it)
Found? 2 and 7 are obtained by means of decomposition. Is there a simplified process?
2.3 conclusion
As long as we can find the factorization, we can use a loop to obtain the value behind the equation. Dividing the value by 2 is the true factor and the first eye of the equation, we may think of using the proportional series formula to solve the problem, however, the power operation can be used to
Recently, there is no substantive work, just a little time, want to learn other people's code. Also saw a bit of source code, is a bit of reading experience, so determined to see the spring of this large-scale project source code, learn its design ideas.
Hand code is not easy, reproduced please specify: Xingoo
powerful GPU debugging, CPU and GPU code analysis, and static OPENCL kernel performance analysis and other capabilities.AMD provides a stand-alone CODEXL analysis tool that supports Windows 7, Windows 8, and Linux systems. There is also an extended version of AMD Codexl on
Intermediary mode analysis, structure diagram and basic code, mediation structure diagram codeZookeeper
Definition: a mediation object is used to encapsulate a series of object interactions. The intermediary makes the objects do not need to be explicitly referenced to each other, so that the coupling is loose and the interaction between them can be changed independently.Applicability: The intermediary mode
. onoptionsitemselected (item); + } - $ /** $ * A placeholder fragment containing a simple view. - *//* This is called in the above placeholder fragment? What the hell, it's like adding multiple fragment to fit the tablet's multi-block display, improving the user experience, and displaying it in a terminal such as a phone. */ - Public Static classPlaceholderfragmentextendsFragment { the - Publicplaceholderfragment () {Wuyi
AsyncTask source code analysis, asynctask source codeFor the usage of AsyncTask, see the previous blog "AsyncTask resumable upload". This article only parses the source code of AsyncTask. AsyncTask.exe cute method:
1 public final AsyncTaskThe executeOnexecute method is called directly in the execute method. AsyncTask.exe cuteOnexecute method:
1 public fi
JQuery. Data source code and jquery source code analysis
JQuery. data is the data cache system of jQuery. It is mainly used to add data for common objects or DOM elements.1. Internal Storage Principle
This principle is very simple. The data originally to be added to the DOM element is now centrally stored in the cache set. They are linked by a number key starti
powerful GPU debugging, CPU and GPU code analysis, and static OPENCL kernel performance analysis capabilities.
AMD provides stand-alone version CODEXL analysis tools that support Windows 7, Windows 8, and Linux systems. An expanded version of AMD Codexl is also available o
ArrayList construction method source code analysis, arraylist construction source code
First, let's take a look at the construction method without parameters:
private static final Object[] DEFAULTCAPACITY_EMPTY_ELEMENTDATA = {}; transient Object[] elementData; public ArrayList() { this.elementData = DEFAULTC
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