### The existing ' ABCDEFGHIJKL ' 12 characters, sorting all its permutations in dictionary order, gives any set of permutations, and says the rent arrangement is the number one small in all permutations.

Label:Topic:The existing ' ABCDEFGHIJKL ' 12 characters, sorting all its permutations in dictionary order, gives any set of permutations, and says the rent arrangement is the number one small in all permutations.It is said that this problem is a

### Find the smallest number of absolute values in an ordered array

Label:Problem:An ordered array, the value may have negative values, or there may not be, you need to find out the absolute value of the least.Method 1:Iterate through the array, find the absolute value minimum, the time complexity O (n), and N is

### 1970 in the programming language

Label:Many programming languages in the time to start from January 1, 1970 0 o'clock, the previous period of time Apple mobile phone brick problem, is caused by this time point, that 1970 where the magic? Today we will discuss this issue.One of the

### Pyhton of single line, multiline annotation notation and its specification

Label:One, single-line comment symbol# used as a single-line comment symbol.Print 1 #输出1Two, multi-line comment symbolMultiline comments are enclosed in three quotation marks "".‘‘‘Used to parse all pages saved from a Web page (HTML)Used to parse

### Nginx Proxy Module

Label:Environment:user:192.168.100.169Nginx Agent: 192.168.100.175tomcat:192.168.100.175Domain Name: www.vijay.com--->192.168.100.1751.nginx Configuration Server { a; server_name www.vijay.com; / {

### Transparent background but text opaque implementation method (compatible with all browsers)

Label:Implementing a transparent CSS approachThere are usually 3 ways to do this, and the following is a 80% notation for opacity1.CSS3 opacity:x, x value from 0 to 1, such as opacity:0.8Setting all descendant elements of the opacity element is

### @ @Error use a simple summary

Label:Using the @ @Error often used to determine whether the previous statement is successful, a summary of this, may be some inaccurate, welcome to point out.1.1 Introduction@@ represents system global variables in SQL SERVER(1) Returns the error

### Zabbix 3.0 Monitoring Switch (1)--Port traffic monitoring

Tags: switch traffic monitoringFirst, switching on the SNMP serviceCisco: Enter the following command in global modeSnmp-server Community public ro #启动snmp服务, and set the read-only community character to public;Snmp-server Enable traps

### How to use Git

Label:A: What is git?Git is currently the most advanced Distributed version control system in the world.Two: What is the main difference between SVN and git?SVN is a centralized version control system, the repository is centrally placed in the

### The difference between a slash/and a backslash \ in a path

Label:Recently encountered a small problem in the project, tangled half a day.What is the difference between using a slash/and a backslash \ in a path. After reviewing some information, we know.UNIX uses a diagonal bar/As a path delimiter, and Web

### Verification Code Captcha Big plug-in

Label:Verification Code Captcha Large plug-in smallI do not know what year or months to complete oademo ah, in short, or step by step, this period of time to start, first do the landing. Some time ago studied the installation of MySQL and memcached

### A simple way to create a new eco-cylinder

Label:Ornamental fish tank should first clear, decomposition of organic waste in the water bacteria should not damage the health of fish.Turbid or yellowish staining is caused by the decomposition of the heterotrophic strains (mineralized bacteria)

### 2006 Tsinghua: Factorial of N

Label: Title Description: Enter a positive integer n to output the factorial of N. Input: Positive integer N (0<=n<=1000) Output:

### The basic operation of the sequential stack: initialization, stack, stack, read the top element of the stack

Tags: sequential stack, initialization, stack, stack, read stack top element, return dynamic elementSequential stack: A set of contiguous storage units from the bottom of the stack to the top of the data element, and due to the particularity of the

### Why do we need performance testing and need LoadRunner

Label:What is a feature:function According to my understanding is software implementation requirements, provide services, then functional testing is to meet the needs of the customer is consistent with the given requirements, that is, the expected

### Homemade Calculator (i): Scanner

Label:Today the first part of the scanner, commonly known as scanners, also known as the lexical analyzer. To understand what scanner has done, we'll start with the whole process. First, the calculator gets the input of a string of characters, such

### The difference between a slash/and a backslash \ in a path

Label:Recently encountered a small problem in the project, tangled half a day.What is the difference between using a slash/and a backslash \ in a path. After reviewing some information, we know.UNIX uses a diagonal bar/As a path delimiter, and Web

### [Daily programming] largest number-give a set of nonnegative integers to find the maximum numbers that can be spliced out of these nonnegative integers

Label:English: Given A list of non negative integers, arrange them such that they form the largest number.English: Give a set of nonnegative integers to find the maximum number of non-negative integers that can be spliced outDescription: For example,

### Memory Management-1

Label:Linux memory management is based on segmentation, paging the logical address into a physical address, while some of the RAM is permanently allocated to the kernel used to store kernel code and static data. The rest of the RAM is dynamic memory.

### [BS-14] 3 ways to print Nsarray and nsdictionary

Label:3 Ways to print Nsarray and nsdictionaryNsarray *arr = @[@"Mercedes",@"BMW",@"Land Rover",@"Tesla"]; //1. Direct PrintingNSLog (@"arr:%@", arr); //2. Using for...in traversal for(NSString *strincharr) {NSLog (@"%@", str); } //3. Using

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