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Summary of loop statements in ruby and summary of ruby loop statements

Summary of loop statements in ruby and summary of ruby loop statements While (when ...) Loop     While Condition Statement 1; Statement 2; statement... End Single Row while LOOP (Statement 1; Statement 2; statement... ) While Condition Until (...) Loop Until condition = while not (condition) For... In Loop     For variable in obj

Summary of common PHP skills and summary of php

Summary of common PHP skills and summary of php PHP File Read function // File Read function PHP_Read ($ file_name) {$ fd = fopen ($ file_name, r); while ($ bufline = fgets ($ fd, 4096 )) {$ buf. = $ bufline;} fclose ($ fd); return $ buf ;}?> File write function // function PHP_Write ($ file_name, $ data, $ method = "w") {$ filenum = @ fopen ($ file_name, $ method ); flock ($ filenum, LOCK_EX); $ file_data

A summary of some common file operations in Ruby and a summary of ruby operations

A summary of some common file operations in Ruby and a summary of ruby operations A lot of Ruby beginners need to learn. Now we are trying to use Ruby to write a script. Many file-related operations are used, which are sorted in stages here. This facilitates subsequent searches. Whether the file or directory exists Copy codeThe Code is as follows:File. exist? ('File _ path ') Is it a file? Copy codeThe

SQL statement optimization in the 2014 summary, and SQL statement in the 2014 Summary

SQL statement optimization in the 2014 summary, and SQL statement in the 2014 Summary I took over a small program for data statistics processing. It was logically nothing, but the data volume was a little large. Some tables had tens of millions of data .. because it is statistics, it is inevitable to connect various queries. It takes one hour to run this applet once it is written .. this is indeed a little

[Linq] common syntax summary and linq Summary

[Linq] common syntax summary and linq Summary Language inheritance Query(Language Integrated Query, LINQ). in C # programming Language, the Query syntax is Integrated, and different data sources can be accessed using the same syntax. LINQ provides an abstraction layer for different data sources, so you can use the same syntax. Public class Book {public int Id {get; set ;}/// 1. Conditional query (Where) Va

GD database usage summary --- 2, gd summary --- 2

GD database usage summary --- 2, gd summary --- 2 Next, go to the previous article. The GD library can be used in a lot of ways. Of course, it must be related to drawing. In addition to the Verification Code and watermark above, it can also perform operations such as scaling, cropping, and rotating the image, this can be seen in many applications. 1. Add a watermark As we already know, we can use imagechar

PHP encryption and decryption string summary, php encryption and decryption Summary

PHP encryption and decryption string summary, php encryption and decryption Summary In projects, we sometimes need to use PHP to encrypt specific information, that is, to generate an encrypted string through the encryption algorithm. The encrypted string can be decrypted through the decryption algorithm, this allows the program to process the decrypted information.The most common applications are user logon

Summary of calling WCF in PHP and summary of calling wcf

Summary of calling WCF in PHP and summary of calling wcf In the third week of the new job, I spent more than three years on. Net. Suddenly, I made a sharp turn in PHP, drifting over the bend, and the speed was 180. Due to data integration, you have to use PHP to call WCF in the project. There is little or no relevant information on the Internet. I posted a post in phpChina and no one has returned. It seems

Summary of remote loading data for ComboBox and summary of JSON data

)) { +SQL + = "and T.jh in (" +str.substring (0, Str.length ()-1) + ")"; A } -List List =Workareainfoservice.getallcengwei (SQL); - String Cengwei = ""; - for(Iterator Iterator =list.iterator (); Iterator.hasnext ();) { -String obj =(String) Iterator.next (); - Cengwei + = obj + ","; in } - if(cengwei!=NULL "". Equals (Cengwei)) { toCengwei = cengwei.substring (0,cengwei.length ()-1); + } -Response.setcharacterencoding ("Utf-8"); the resp

Z.net usage summary, Quartz.net Summary

Z.net usage summary, Quartz.net Summary In this project, task scheduling is used to implement the SMS sending gateway. Therefore, we will share the experience of Quartz.net. Quartz.net is used for task scheduling. Previously, the window service installed in C # was used. This time, we plan to use Topshel as the window service. In fact, it feels similar. OK. Next let's talk about the usage of Quartz.net in d

JQuery summary and jquery Summary

JQuery summary and jquery Summary I. Overview 1. What is JQuery? JQuery is a JavaScript library that simplifies JS operations and extends JS functions.2. separation principle JQuery follows the principle of separation of import and use, that is, using one 3. Basic syntax $(selector).action(); Obtain the HTML element and perform the specified operation on the element.Two selector 1. Basic Selector Similar to

[JQuery] A summary of common methods in jQuery and a summary of jquery

[JQuery] A summary of common methods in jQuery and a summary of jquery 1. Hierarchical SelectorDescendant selector "parent element descendant element" For example, $ ("div p") selects all p elements under the div element.Child element selector "parent element> child element" For example, $ ("div> p") selects the p element in the child element of the div.The first backward sibling element "element name + sib

Selectize usage summary, selectize Summary

Selectize usage summary, selectize SummaryI. Introduction Selectize is an extensible jQuery-based custom drop-down box UI control. It is useful for displaying tags, contact lists, and country selectors. Its size is ~ About 7 kb (gzip compression. Provides a reliable and experienced clean and powerful API. Function introduction: Options can be queried and sorted; Use the arrow keys to continue and → at 1 then⃣Move between selected options; You can

Summary of vue. js and summary of vue. js

Summary of vue. js and summary of vue. js This article mainly summarizes the understanding of vue: Reference Source: http://blog.csdn.net/generon/article/details/72482844 Vue. js is a progressive framework for building user interfaces. Its core library only focuses on the view layer. Compared with other frameworks, it is easier to use and has better performance than most frameworks. However, there are also

Mobile front-end summary-Chapter 1 ., Mobile front-end summary chapter 1

Mobile front-end summary-Chapter 1 ., Mobile front-end summary chapter 1 I have been not very familiar with mobile projects, and I am very little familiar with them. I am using some percentages. I am doing nothing about it. I. first look at the header. Format-detection: "format detection". As its name suggests, it is used to detect some formats in html, the format-detection attribute of meta mainly include

iOS Development--Summary & Common Development Summary

: Animation of 2.CALayer What values can the keypath of cabasicanimation and cakeyframeanimation be? Search in Xcode documents: Calayer animatable Properties Specific properties of transform: Search Catransform3d Key Path 1> cabasicanimation * Fromvalue Initial value * Tovalue final value (from initialization change to last value) * Byvalue Step value (based on initial value, how many values are added) 2> cakeyframeanimation * Values

C + + Memory summary-open pit, summary add at any time

The C + + memory area is divided into:Program code area: Where program code is storedStack area: An area of memory that the compiler automatically manages (allocates releases), such as function parameters, local variables in functionsHeap area (also known as dynamic storage): The functions in the C language malloc and the operator new in free and C + +, delete request and release, the programmer manages itselfStatic zone (also called Global Zone): Holds global variables, static global variables,

iOS Development Summary (A1)-The second small app development come to an conclusion, hope and last as smoothly through the Apple audit, the next few days to the development process to make a summary

1. When to use delegate and block;2. Retain cycle caused by block;3. Careful use of nsmutable ..., may inadvertently modify the data4. AddressBook frame (after iOS9 replaced with contact frame, seemingly better use)5. Custom Table View cell6. Uitableviewrowaction7. Uiactivityviewcontroller, and Uialertcontroller8. Once again confirm the Viewcontroller life cycle, when will the geometry information for the view be determined (and what else should be done in viewdidlayoutsubviews?). )9. Mfmessagec

[Summary of competition] Qingdao Polytechnic University Invitational Competition Summary

November 26, 2016, through the ACM Association's in-session selection and teaming, I first participated in the real ACM nature of the competition.To get to the green technology, the first harvest is-Qingdao Polytechnic University Campus Environment is really much worse than their own school environment, suddenly found their school is still very beautiful. Then 9 o'clock we took part in the experience of the exchange, found in the computer room is really ... Except for the inability to use, the o

Program Learning Resources Summary (Welcome to recommend and strengthen resources summary)

1. Kotlin Language Tutorial: http://www.runoob.com/kotlin/kotlin-basic-syntax.html2. Small program:API applet: https://developers.weixin.qq.com/miniprogram/dev/api/WXSS Small Program: https://developers.weixin.qq.com/miniprogram/dev/framework/view/wxss.html3. Android API Learning Document: http://www.android-doc.com/reference/packages.html4. Speech Recognition: Https://www.xfyun.cn/services/voicedictationProgram Learning Resources Summary (Welcome to

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