transfinite induction

(mainly changing the autosearchtime local parameters). Case:wooyun:12306 Automatic ticket time can change the vulnerability2 Time range TestFor certain time-limited businesses, modify their time limits, such as the business that is queried within a certain time limit, modify the request that contains the time-limited text segment and submit it to see if the business process can be completed bypassing the time limit. For example, by changing the range of month on which the office is queried, you

Package Com.fs.po;import Java.lang.reflect.constructor;import Java.lang.reflect.field;import Java.lang.reflect.method;public class Test {private void M1 () throws Exception {/** Gets the method of constructing public type in Stu Package Com.fs.po;public class Stu {private String name;private float hight;public int age;public Stu () {System.out.printl N ("Stu ()");} /*** * DFSDFDAFASD * @param name * @param age */public Stu (String name, Integer age) {this.name = Name;this.age = age;} Public Stu

The array is also divided into mutable and immutable. Like nsstring, the initialization method is similar, and the operations on elements are similar, as shown below. Practice several times more and know what each means. Make a deeper impression when developing a project. // Immutable array // the element of the array can only be an object. If it is an int or float, you can use nsnumber to convert it to use // initialization methods, nsarray * arr1 = [nsarray arraywithobject: @ "hello"]; nsar

remaining number of n-1 to re-form a large heap, so reciprocating.functionheapsort (DataArray) {//First create a big top pile Varlength=dataarray.unshift (0); //depending on the characteristics of the tree nodes, the parent node is the first I node, then the child node is the i*2 and the i*2+1 nodes, but the node is calculated from 1, the array is 0, so here is the incoming array //start position added an element for (var i=math.floor ((length-1)/2); i>0;i--) {dataarra

JS Simple inductive basic typenumber,string,boolean,null,undefinedCombination type一种对象类型: object 数组 函数 对象 正则About functions　　　　作用域　　　　闭包　　　　构造函数　　　　原型链About objects　　　　类　　　　类的继承　　　　实例方法　　　　静态方法　　　　私有方法Operator Arithmetic Logic Relationship -bit Statement　　循环分支语句Several ways of declaring variables in JS a,b参数变量 如function fn(a,b){} p,q是var定义的 m:函数声明:FDThe difference between them 他们都会变量上浮。(variable hoist);

(' k1 ' = ' val1 ', ' k2 ' = ' val2 ', ' K3 ' =Array(' v3 ', ' v4 '));Echo $encode _str= Json_encode ($arr);//Json_decode () converts a JSON format string to an object or an array returned, the return type is determined by the second parameter, the default value of the second parameter False,json the key and value in the format string must be enclosed in double quotation marks//If the return type is an object, The element or array that corresponds to a key value in the first cast of the array, t

, ThreadLocal is not used to solve multi-threaded access problems with shared objects, and in general, objects in the thread through Threadlocal.set () areThe thread itself uses the object that other threads do not need to access, nor access. Different objects are accessed in each thread.In addition, it is said that threadlocal allows each thread to maintain its own independent object, not by Threadlocal.set (), but by each threadA new object in the action to create an object, each thread create

);}}} public void sort (int[] array) {createheap (array); sortHeap (array);} /** * Defragment the heap structure of a single node * @param array * Target array * @param nodeposition * node location */private void Sortnode (int[] Array, int nodeposition, int heapsize) {int leftchildpst = getleftchildposition (nodeposition); int rightchildpst = GetRigh Tchildposition (nodeposition); int largestposition = Nodeposition;if (Leftchildpst Finally, random pairs of arrays of length 100,000test a single

Today in the running of the project, and encountered the pit, in the company run a good project, to my own computer on the error, the hint across the domain, think for a long time do not understand why, webpack configuration file IP address I also changed to the local IP corresponding, baffled its solution, in seeking help from others, He soon knew the problem, that is, the local IP needs to be changed to the company project corresponding to, and then changed the IP, again run, and error, as fol

-m# fdisk-l |grep Dev3. Modification timeThe date command sets the dates to June 18, 2014# date-s 06/18/14Set the time to 14 points, 20 minutes, 50 seconds# date-s 14:20:50Set the time to June 18, 2014 14:16 30 seconds (MMDDHHMMYYYY.SS)# date 0618141614.304.centos7 forgot root passwordGrub interface---"Vmlinuz init=/bin/sh---" by e---"Ctrl+x---"#mount-O remount,rw/---"Remove password---" exec/sbin/initNote : When the 7.3 version enters emergency mode, SELinux must be turned off, otherwise it can

-sensitive2. Classification of constants: integer constants, real constants, character constants, string constants3. Categories of variables: 1. Integer variables: Basic, short, long, and unsigned four2. Real variable classification: single-precision, double-precision4. Exponential form: The letter E or E must be preceded by a number, and the letters E and E after the exponent must be an integer, the letter E or E before and after and the number must not have a space (the real variable also abid

Conclusion:xxx.yyyy A yyyy can be a class, a class object, a function, a variable can be a package, a module, a classCode:ref1.py# -*-coding:utf-8-*- Import OS class ABCCC (object): def f (self,a): Print = = = 5 def f (a): print "AA" " + Atest1.py#-*-coding:utf-8-*-"""xxx.yyyyyyyy can be classes, class objects, functions, variables xxx can be packages, modules, classes"""Importref1Printtype (REF1.ABCCC)PrintRef1.eref1.f ("6") REF1.D.F ("8") e=ref1.c ()Printtype (e)Printtype (

#-*-coding:utf-8-*-"""multi-threaded producer, consumers using queue queues"""ImportQueueImportThreadingImport TimeImportRandomqueue= Queue.queue (3)#Create a queue of 3 sizesclassProducer (Threading. Thread):"""producers, writing data to the queue""" def __init__(self, queue): Super (Producer, self).__init__()#calling the parent class constructorSelf.queue =QueuedefRun (self): whiletrue:my_rand_double=random.random () self.queue.put (my_rand_double)#Write Data to the queue Print "

#-*-coding:utf-8-*-"""Study Queue Queue Summary: 1. The queue can be set to a size or an infinite size of 2. Empty, full, read and write can be blocked, can also error 3. The queue can store different data type Objects 4. The implementation of the queue is heavily used in threading module threading, indicating the applicable Data sharing operations between multithreading are not determined to be suitable for data sharing operations between multiple processes 5. The implementation of the queue is

for tools such as compile or run (must be set), config (%java_home%\bin;%java_home%\jre\bin;)Classpath: Where to find the class file that needs to be run (Java5 start not set), configure (.; %java_home%\lib;%java_home%\lib\tools.jar (Note that there is a point at the front))After the configuration, whether in the CMD, or directly with the tools, such as Eclipse,editplus can begin to write Java program, think of a little excited about it. Take a look at the simplest program.You get the final res

#-*-Coding:utf-8-*-"" "Test process uses multiprocessing. Process use: 1. Prepare a function 　　Python Induction (eight) _ Multi-process _ basic use

Polynomial evaluationSuppose there is a sequence of n+2 real a0,a1,..., An and X, to find the polynomialP_NX = a_nx^n + a_n-1x^n-1 + ... + a_1x + a_0;You need multiplication: n+n-1 + ... +2+1 = n (n+1)/2Need addition: NVisible algorithm efficiency is O (n^2)and P_nx = ((... (((((a_n) x + a_n-1) x + a_n-2) x + a_n-3) ...) X + a_1x) + a_0So the idea:p_0x = A_np_1x = xp_0x + a_n-1p_2x = xp_2x + a_n-2......P_NX = xp_n-1x + a_0Complexity of Time:Make t (n) The sum of the addition and multiplication r

number of characters Len${varible:start} # starts from the left (start+1) character until the end of the page${varible: 0-start:len} # starts with the first character on the right and the number of characters Len${varible: 0-start} # starts with the start character on the right and ends at the end of the page Note: varible variable name start character begin position the first character on the left is denoted by 0, and the first character on the right is denoted by 0-1.Len Characte

"folder" and "Folders".4, specify the number of repetitionsTo match a specific number of times for an item, use the form "\{n,m}". where "n" and "M" are numbers. The item in front of it will be repeated "n" to "M" Times (|inclusive| contains "n" and "M"). For example:/ab\{3,5}Match "abbb", "abbbb" and "abbbbb".When "n" is omitted, it is defaulted to zero. When "M" is omitted, the default is infinity. When ", M" is omitted, it means repeating exactly "n" Times. For example:Pattern Match times\{,

rangeLine at the beginning of the end of the space: ^\s*|\s*$//The first line appears any space or the tail line appears any space (any means can also have no space)Email:^\[email protected][a-z0-9]+ (\.[ a-z]+) {1,3}$Start at least one character (\w letters, numbers, or underscores), and then match @, followed by any letter or number, \. Represents the real point,. The character behind is at least one (A-Z), and this (for example,. com) whole is the end of a subkey, which can occur 1-3 times.