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#!/usr/bin/env python# Coding:utf-8Import Redef Dealwith (Express): Express.replace ('+-','-') Express.replace ('--','+') returnexpressdef Col_suanshu (exp):if '/' inchexp:a,b= Exp.split ('/') returnStrfloat(a)/float(b))if '*' inchexp:a,b= Exp.split ('*') returnStrfloat(a) *float(b) def get_no_barcate (Express): Express=express.strip ('()') Print ('>>>', Express) whileTrue:ret= Re.search ("-?\d+\.? \d*[*/]-?\d+\.? \d*", Express)ifRet:res=Col_suanshu (Ret.group ()) Express= Ex

As follows: 1, two divs, d1 contains d2 Both d1 and d2 have absolute or relative. 3. Hide d1 4. Hide the child element d2. 5. Display d1 At this time, IE6/7 and IE8/9/10 (IE7 mode) will find that the child element d2 can also be displayed (don't forget, d2 is displayed: none ). However, IE8/9/10/Firefox5/Safari4/Chrome

The sixth chapter Agile processIn the context of software engineering, "agile Processes" are a collection of values and methodologies. There are the following principles:1. Deliver valuable software early and consistently to meet customer needs.2. Agile processes welcome changes in demand and take advantage of this change to improve the competitive advantage of users.3. Often released software available, the release interval can be from a few weeks to several months, can be short or short.4. Bus

8 chapters, plans and estimates, when it comes to the engineers of a well-known company, the expected time to do software is always extended for a long time. To deceive the boss? Or to inspire the potential of engineers to make them work hard? Chapter 9: What kind of person can be a pm,pm if there are many people who can do it, PM has only one quota, not being chosen may not be satisfied, PM may not be able to manage some of the team's people.

As follows 1, two div,d1 contain D2 2,d1,d2 are set up absolute or relative. 3, Hide D1 4, Hide child elements D2 5, show D1 Then Ie6/7 and IE8/9/10 (IE7 mode) will find that the child element D2 can also be displayed (don't forget, D2 was Display:none OH). But the Ie8/9/10/firefox5/safari4/chrome12 neutron element D2

Reprinted from: http://blog.csdn.net/wangkechuang/article/details/7618822 The easiest thing to think about is to try to put 9 points into a regular 3 line, as shown in the following figure: But only 8 lines can be drawn. In fact, each line crosses 3 points, then 10 lines go through 30 points, which requires an average of more than 3 lines across each point. The points in the center and 4 corners of the

As a built-in type, channels (channel) get a lot of support from the runtime, and its own design is ingenious. But anyway, it's essentially a queue, and locks are unavoidable when multiple goroutine operate concurrently. At some point, this competitive mechanism can lead to performance problems.Here is an example of simply using the channel to send and receive data, for "accurate" measurement of the transmit and receive operation performance, we put the make channel operation outside, as far as

user, we also communicate and understand them with representatives of typical users. From a typical user to a typical scenario, write a typical scenario for a typical user, from the scene to the task, and finally the story template.Use case, is the requirement analysis tool. Convey information by telling simple stories. But it's difficult to tell a story, it's hard to be handy. So, want to master good, more efforts!Specification sheet. There are software function manuals and software technical

representatives, understand the users, understand how they work and need them, and then modify and refine the typical user.Use case: (very common requirement analysis tool)Principles for using use cases: Deliver information by telling simple stories Maintain a system-wide understanding Focus on the value of your users Build the entire system and complete one use case at a time Incremental development to build the entire system incrementally Adapting to the changing

also need to be able to work with other people,Equal.A good PM requires strong requirements and capabilities:1Ability to observe, understand and learn quickly2. Ability to analyze3. A certain degree of professional competence4. A certain degree of professional competence5. Ability to introspect. These are key to the team's success and very important. The tenth chapter mainly introduces the typical users and scenes. Typical users can include content:1. Name (the more natural the better).2Age3. I

mainly about the Microsoft PM and other team PM differences, I think the Microsoft PM to the team members feel is very different, like a comrade-in-arms, working up also have a feeling. Need to have strong communication, expression ability, with strong analysis, reasoning and judgment of the ability.　Tenth chapter: Typical Users and scenarios　The typical users and scenes mentioned in the book are considered in this way for the user, and I think it is very vivid and feasible. User needs analysis

Eighth chapter,After reading the eighth chapter, I learned the types of software requirements, stakeholders, the common methods and steps of acquiring user requirements, the framework and NABCD of the analysis of competitive requirements, the four-quadrant approach, the project plan and the technology.Problem: How to get the potential demand of the user?Nineth Chapter, read the Nineth chapter after I learned the team role division, the project manager's origin and requirements, the difference be

8th Chapter Requirements AnalysisSoftware requirement analysis is the software feasibility analysis of software planning during the elaboration and refinement, analysis of various possible solutions, and assigned to the various software elements. Demand analysis is the final step in the software definition phase, which is to determine what the system must accomplish, which is to put forward complete, accurate, clear and specific requirements for the target system.NABCD model is a good applicatio

ArrayList list =NewArrayList ();//declares a new collectionRandom r =NewRandom ();//declare a random number object for(inti =0; I Ten; )//i to the collection { intRnumber = R.next (0,Ten);//Assign a random number to Rnumber if(!list. Contains (Rnumber))//If the list collection does not contain the Rnumber "list. Contains (Rnumber) is included, plus one! Number is not included in the "{list. ADD (Rnumber); //adding Rnumb

brightness of the merger).The Sampler tool has a maximum of 4, and the color information is displayed in the Information palette 〖f8〗. You can use the Sampler tool to move an existing sampling point. If you switch to another tool, the sample point markers in the screen will not be visible, but the information palette still displays.You can change the sampling size option in the public bar. The sampling point represents the color of the pixel at the sampling point. The 3x3 mean and 5x5 averages

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different application types and are isolated by VLAN. Two mezzanine-Ports Access high-speed independent storage network with FC-SAN 650) This. width = 650; "style =" border-bottom: 0px; border-left: 0px; border-top: 0px; border-Right: 0px; "Title =" 6 (1) "Border =" 0 "alt =" 6 (1) "src =" http://img1.51cto.com/attachment/201410/23/718756_1414033731wEeD.jpg "Height =" 274 "/> Define FC port access to storage network respectively 650) This. width = 650; "style =" border-bottom: 0px; border-left:

memory into trunk blocks of several specific lengths according to a predefined size, and to classify trunk blocks of the same length into slab groups, and the size of the slab groupIncrement according to the argument of a growth factor. When Memcached accepts a key-value pair storage request sent to the front-end client application, it first calculates if the data block has enough size to accommodate the record, if it is not enough to apply to the system, if the application limit is reached, us

See a very god template, specifically what meaning still do not understand, first horse to study again ~1 BOOLPrime (Long Longnum)2 { 3 if(num = =2|| num = =3|| num = =5) 4 return true; 5 if(num%2==0|| Num%3==0|| Num%5==0|| num = =1) 6 return false; 7 8 Long Longc =7; 9 intMAXC = (int) (sqrt (num)); Ten while(c maxc) One { A if(num% c = =0) - return false; -c + =4; the if(

20. Looking for a 2D matrixGiven a m*n matrix that increments from left to right from top to bottom, determine if Target is in the matrixCases:[[1, 3, 5, 7],[10, 11, 16, 20],[23, 30, 34, 50]]Target=3Return: TrueIdea: two-point searchCode:public class Test {public static Boolean Searchmatrix (int[][] matrix, int target) {if (Matrix = = NULL | | matrix.length = = 0 | | Matrix[0].length = = 0) return false;int m = matrix.length;int n = matrix[0].length;i