【IT专家】object
【IT专家】在JAVA中封装JSONUtils工具类及使用 (转)
本文由我司收集整编，推荐下载，如有疑问，请与我司联系在JAVA 中封装JSONUtils 工具类及使用（转）HashMap String, Object data = new HashMap String, Object (); JSONObject jsonObject = JSONUtils.toJSONObject(object); Iterator it = jsonObject.keys(); while (it.hasNext()) String key = String.valueOf(it.next()); Object value = jsonObject.get(key); data.put(key, value); return data; /*** * 将对象转换为List * @param object * @return// 返回非实体类型(Map)的List public static List Map String, Object toList(Object object) List Map String, Object list = new ArrayList Map String, Object (); JSONArray jsonArray = JSONArray.fromObject(object); for (Object obj : jsonArray) JSONObject jsonObject = (JSONObject) obj; Map String, Object map = new HashMap String, Object (); Iterator it = jsonObject.keys(); while (it.hasNext()) String key = (String) it.next(); Object value = jsonObject.get(key); map.put((String) key, value); list.add(map); return list; /*** * 将JSON 对象数组转换为传入类型的List * @param * @param jsonArray *@param objectClass * @return public static T List T toList(JSONArray jsonArray, Class T objectClass) return JSONArray.toList(jsonArray, objectClass); /*** * 将对象转换为传入类型的List * @param * @param jsonArray * @param objectClass * @return public static T List T toList(Object object, Class T objectClass) JSONArray jsonArray = JSONArray.fromObject(object); return JSONArray.toList(jsonArray, objectClass); /*** *将JSON 对象转换为传入类型的对象* @param * @param jsonObject * @param beanClass * @return public static T T toBean(JSONObject jsonObject, Class T beanClass)return (T) JSONObject.toBean(jsonObject, beanClass); /*** * 将将对象转换为传入类型的对象* @param * @param object * @param beanClass * @return public static T T toBean(Object object, Class T beanClass) JSONObject jsonObject = JSONObject.fromObject(object); return (T) JSONObject.toBean(jsonObject, beanClass); /*** * 将JSON 文本反序列化为主从关系的实体* @param 泛型T 代表主实体类型* @param 泛型D 代表从实体类型* @param jsonString JSON 文本* @param mainClass 主实体类型* @param detailName 从实体类在主实体类中的属性名称*。
【IT专家】在Xcode 9中,'Object'在此上下文中的类型查找是不明确的
本文由我司收集整编，推荐下载，如有疑问，请与我司联系在Xcode 9 中，’Object’在此上下文中的类型查找是不明确的在Xcode 9 中，’Object’在此上下文中的类型查找是不明确的[英]’Object’is ambiguous for type lookup in this context in Xcode 9 I want to update my app for IOS 11, and have this issue. This is my current code:我想为IOS 11 更新我的应用程序,并遇到此问题。
这是我目前的代码:protocol DataSourceDelegate: class { associatedtype Object func cellIdentifierForObject(object: Object) - String func swipeToDeleteObject(object: Object) This protocol is used in one of my view controller:此协议用于我的一个视图控制器:extension TransactionsViewController: DataSourceDelegate { func cellIdentifierForObject(object: Object) - String { return “Cell”func swipeToDeleteObject(object: Object) { object.managedObjectContext?.performChanges { object.managedObjectContext?.delete(object) Now I get this error for the Object type:现在我得到Object 类型的这个错误:‘Object’ is ambiguous for type lookup in this context在此上下文中,“对象”对于类型查找是不明确的On this line:在这一行:func cellIdentifierForObject(object: Object) - String { ... } For my this issue appears because there are some other Object type in my project. I tried to put the protocol or classname in front of the name, but I still get error.出现此问题是因为我的项目中还有其他一些Object 类型。
【IT专家】致命错误-mpi。h-没有这样的文件或目录#包含。
致命错误:mpi。
h:没有这样的文件或目录#包含。
致命错误:mpi。
h:没有这样的文件或目录#包含。
[英]fatal error: mpi.h: No suchfile or directory #include it tells me that there is no such file or directory. But when i include the path to mpi.h as它告诉我没有这样的文件或目录。
但是当我包含到mpi 的路径时。
h 作为#include “/usr/include/mpi/mpi.h” (the path is correct) it returns:(路径正确)返回:In file included from /usr/include/mpi/mpi.h:2087:0, from :7:/usr/include/mpi/openmpi/ompi/mpi/cxx/mpicxx.h:35:17: fatal error: mpi.h: No such file or directory #include “mpi.h”compilation terminated. Anyone know how to fix this?有人知道怎么修复吗?24The problem is almost certainly that you’re not using the MPI compiler wrappers. Whenever you’re compiling an MPI program, you should use the MPI wrappers:几乎可以肯定的是，您没有使用MPI 编译器包装器。
无论何时编译MPI 程序，都应该使用MPI 包装器:C - mpicc C - mpicc C++ - mpiCC, mpicxx, mpic++ c++ - mpiCC, mpicxx, mpic+ FORTRAN - mpifort, mpif77, mpif90 FORTRAN - mpifort, mpif77, mpif90 These wrappers do all of the dirty work for you of making sure that all of the appropriate compiler flags, libraries, include directories, library directories, etc. are included when you compile your program.这些包装器为您做了所有肮脏的工作，以确保在编译程序时包含所有适当的编译器标志、库、包括目录、库目录等。
【IT专家】我正在尝试导出一个excel,并使它的密码得到保护。我的代码如下所示。但是我得到了错误
本文由我司收集整编，推荐下载，如有疑问，请与我司联系我正在尝试导出一个excel，并使它的密码得到保护。
我的代码如下所示。
但是我得到了错误我正在尝试导出一个excel，并使它的密码得到保护。
我的代码如下所示。
但是我得到了错误[英]I am trying to export an excel and make it password protected. My code is given below.But i am getting error I am trying to export an excel and make it password protected.我正在尝试导出一个excel，并将它设置为密码保护。
My code is given below.我的代码如下所示。
But i am getting error:但我错了:Excel completed file level validation and repair.Excel 完成文件级别的验证和修复。
Some parts of this workbook may have been repaired or discarded.这本工作簿的某些部分可能已被修理或丢弃。
I DON’T KNOW WHAT I AM DOING WRONG .我不知道我做错了什么。
In-case i do it without the save As line for package then this error doesn’t appear.如果我这样做，如果没有为包的行保存，那么这个错误就不会出现。
In my controller:在我的控制器:[HttpGet] public FileStreamResult ExportToExcel() _objService = new ServiceBAL(); List ReconcilationEntity Objmodel = new List ReconcilationEntity Objmodel = _objService.GetCreditsudharLeads(); String URL = string.Empty; if (!Directory.Exists(Server.MapPath(“~/TempExcel”)))。
js中object方法
js中object方法【最新版2篇】目录（篇1）1.概述2.object 的构造函数3.object 的属性4.object 的方法5.实例正文（篇1）1.概述在 JavaScript 中，object 是一种特殊的数据类型，它用于创建对象。
对象可以看作是一个包含多个键值对的集合，其中每个键 (也称为属性) 都与一个值相关联。
在 JavaScript 中，可以使用 object 构造函数来创建对象，也可以使用字面量或者创建一个新的空对象。
2.object 的构造函数object 构造函数可以用来创建一个新的对象。
它的语法如下：```var obj = new Object();```其中，obj 是新建对象的引用，而 Object 则是构造函数的名字。
使用 object 构造函数创建的对象是一个空的对象，也就是说，它不包含任何属性和方法。
3.object 的属性object 的属性可以看作是对象的特征，每个属性都与一个值相关联。
在 JavaScript 中，可以通过点表示法或者方括号表示法来访问对象的属性。
- 点表示法：直接使用点号来访问对象的属性，例如：```var obj = {name: "John", age: 30};console.log(); // 输出 "John"```- 方括号表示法：使用方括号来访问对象的属性，例如：```var obj = {name: "John", age: 30};console.log(obj["name"]); // 输出 "John"```4.object 的方法object 对象自身也包含了一些方法，这些方法可以用来操作对象。
以下是一些常用的 object 方法：- constructor：返回对象的构造函数- prototype：返回对象的原型- toString：返回对象的字符串表示- toLocaleString：返回对象的本地字符串表示- toJSON：返回对象的 JSON 表示- forEach：遍历对象的属性- map：创建一个新对象，将原对象的属性映射到新对象上- filter：创建一个新对象，包含通过测试的原对象的属性- reduce：将对象的属性归约为一个值- sort：对对象的属性进行排序- indexOf：返回对象属性在另一个对象中首次出现的位置- find：返回对象属性在另一个对象中首次满足条件的值- some：测试对象的属性是否满足条件- every：测试对象的所有属性是否都满足条件5.实例以下是一个使用 object 构造函数创建对象的实例：```var obj = new Object(); = "John";obj.age = 30;console.log(obj); // 输出 {name: "John", age: 30}```在这个例子中，我们使用 object 构造函数创建了一个名为 obj 的新对象，并给它添加了两个属性：name 和 age。
Object标签的classid
在HTML中使用的Object标签中，需要的classid 代码Windows Media Player 7 及更高版本的class ID 是：clsid:6BF52A52-394A-11D3-B153-00C04F79FAA6. Windows Media Player 6.4clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95 (推荐使用，windows media player向下兼容) Windows Media Player 6 （更老的版本）clsid:05589FA1-C356-11CE-BF01-00AA0055595A 日历idclsid:8E27C92B-1264-101C-8A2F-040224009C02flash视频idclsid:D27CDB6E-AE6D-11cf-96B8-444553540000 图形图像idCLSID:369303C2-D7AC-11D0-89D5-00A0C90833E6application/pics-rules prfapplication/pkcs10 p10application/pkix-crl crlapplication/postscript aiapplication/postscript epsapplication/postscript ps application/rtf rtf application/set-payment-initiation setpay application/set-registration-initiation setreg application/vnd.ms-excel xla application/vnd.ms-excel xlc application/vnd.ms-excel xlm application/vnd.ms-excel xls application/vnd.ms-excel xlt application/vnd.ms-excel xlw application/vnd.ms-outlook msg application/vnd.ms-pkicertstore sst application/vnd.ms-pkiseccat cat application/vnd.ms-pkistl stl application/vnd.ms-powerpoint pot application/vnd.ms-powerpoint pps application/vnd.ms-powerpoint ppt application/vnd.ms-project mpp application/vnd.ms-works wcm application/vnd.ms-works wdb application/vnd.ms-works wks application/vnd.ms-works wps application/winhlp hlpapplication/x-bcpio bcpioapplication/x-cdf cdf application/x-compress zapplication/x-compressed tgz application/x-cpio cpioapplication/x-csh cshapplication/x-director dcr application/x-director dir application/x-director dxr application/x-dvi dvi application/x-gtar gtar application/x-gzip gz application/x-hdf hdf application/x-internet-signup ins application/x-internet-signup isp application/x-iphone iii application/x-javascript js application/x-latex latex application/x-msaccess mdb application/x-mscardfile crd application/x-msclip clp application/x-msdownload dll application/x-msmediaview m13 application/x-msmediaview m14 application/x-msmediaview mvb application/x-msmetafile wmf application/x-msmoney mny application/x-mspublisher pub application/x-msschedule scd application/x-msterminal trm application/x-mswrite wri application/x-netcdf cdf application/x-netcdf nc application/x-perfmon pma application/x-perfmon pmc application/x-perfmon pml application/x-perfmon pmr application/x-perfmon pmw application/x-pkcs12 p12 application/x-pkcs12 pfxapplication/x-pkcs7-certificates p7b application/x-pkcs7-certificates spc application/x-pkcs7-certreqresp p7r application/x-pkcs7-mime p7c application/x-pkcs7-mime p7m application/x-pkcs7-signature p7s application/x-sh shapplication/x-shar shar application/x-shockwave-flash swf application/x-stuffit sitapplication/x-sv4cpio sv4cpio application/x-sv4crc sv4crcapplication/x-tar tarapplication/x-tcl tclapplication/x-tex texapplication/x-texinfo texiapplication/x-texinfo texinfoapplication/x-troff roffapplication/x-troff tapplication/x-troff tr application/x-troff-man man application/x-troff-me meapplication/x-troff-ms msapplication/x-ustar ustar application/x-wais-source src application/x-x509-ca-cert cer application/x-x509-ca-cert crt application/x-x509-ca-cert der application/ynd.ms-pkipko pko application/zip zipaudio/basic auaudio/basic sndaudio/mid midaudio/mid rmiaudio/mpeg mp3audio/x-aiff aifaudio/x-aiff aifcaudio/x-aiff aiff audio/x-mpegurl m3u audio/x-pn-realaudio ra audio/x-pn-realaudio ram audio/x-wav wavimage/bmp bmp image/cis-cod codimage/gif gifimage/ief iefimage/jpeg jpeimage/jpeg jpegimage/jpeg jpgimage/pipeg jfifimage/svg+xml svg image/tiff tifimage/tiff tiff image/x-cmu-raster ras image/x-cmx cmximage/x-icon ico image/x-portable-anymap pnm image/x-portable-bitmap pbm image/x-portable-graymap pgm image/x-portable-pixmap ppm image/x-rgb rgb image/x-xbitmap xbm image/x-xpixmap xpm image/x-xwindowdump xwd message/rfc822 mht message/rfc822 mhtml message/rfc822 nws text/css csstext/h323 323text/html htmtext/html htmltext/html stmtext/iuls ulstext/plain bastext/plain ctext/plain htext/plain txttext/richtext rtxtext/scriptlet sct text/tab-separated-values tsv text/webviewhtml htt text/x-component htc text/x-setext etxtext/x-vcard vcfvideo/mpeg mp2video/mpeg mpavideo/mpeg mpevideo/mpeg mpegvideo/mpeg mpgvideo/mpeg mpv2 video/quicktime mov video/quicktime qtvideo/x-la-asf lsfvideo/x-la-asf lsx video/x-ms-asf asf video/x-ms-asf asr video/x-ms-asf asx video/x-msvideo avi video/x-sgi-movie movie x-world/x-vrml flrx-world/x-vrml vrml x-world/x-vrml wrl扩展名类型/子类型application/octet-stream 323 text/h323acx application/internet-property-streamai application/postscriptaif audio/x-aiffaifc audio/x-aiffaiff audio/x-aiffasf video/x-ms-asfasr video/x-ms-asfasx video/x-ms-asfau audio/basicavi video/x-msvideoaxs application/olescriptbas text/plainbcpio application/x-bcpiobin application/octet-streambmp image/bmpc text/plaincat application/vnd.ms-pkiseccatcdf application/x-cdfcer application/x-x509-ca-certclass application/octet-streamclp application/x-msclipcmx image/x-cmxcod image/cis-codcpio application/x-cpiocrd application/x-mscardfilecrl application/pkix-crlcrt application/x-x509-ca-certcsh application/x-cshcss text/cssdcr application/x-director der application/x-x509-ca-cert dir application/x-directordll application/x-msdownload dms application/octet-stream doc application/msworddot application/msworddvi application/x-dvidxr application/x-director eps application/postscript etx text/x-setextevy application/envoyexe application/octet-stream fif application/fractalsflr x-world/x-vrmlgif image/gifgtar application/x-gtargz application/x-gziph text/plainhdf application/x-hdfhlp application/winhlphqx application/mac-binhex40 hta application/htahtc text/x-componenthtm text/htmlhtml text/htmlhtt text/webviewhtmlico image/x-iconief image/iefiii application/x-iphoneins application/x-internet-signup isp application/x-internet-signupjfif image/pipegjpe image/jpegjpeg image/jpegjpg image/jpegjs application/x-javascript latex application/x-latexlha application/octet-stream lsf video/x-la-asflsx video/x-la-asflzh application/octet-stream m13 application/x-msmediaview m14 application/x-msmediaview m3u audio/x-mpegurl man application/x-troff-man mdb application/x-msaccess me application/x-troff-me mht message/rfc822 mhtml message/rfc822mid audio/midmny application/x-msmoney mov video/quicktime movie video/x-sgi-moviemp2 video/mpegmp3 audio/mpegmpa video/mpegmpe video/mpegmpeg video/mpegmpg video/mpegmpp application/vnd.ms-project mpv2 video/mpegms application/x-troff-ms mvb application/x-msmediaview nws message/rfc822oda application/odap10 application/pkcs10p12 application/x-pkcs12p7b application/x-pkcs7-certificates p7c application/x-pkcs7-mimep7m application/x-pkcs7-mimep7r application/x-pkcs7-certreqresp p7s application/x-pkcs7-signature pbm image/x-portable-bitmap pdf application/pdfpfx application/x-pkcs12 pgm image/x-portable-graymap pko application/ynd.ms-pkipko pma application/x-perfmon pmc application/x-perfmonpml application/x-perfmonpmr application/x-perfmon pmw application/x-perfmon pnm image/x-portable-anymap pot, application/vnd.ms-powerpoint ppm image/x-portable-pixmap pps application/vnd.ms-powerpoint ppt application/vnd.ms-powerpoint prf application/pics-rulesps application/postscriptpub application/x-mspublisherqt video/quicktimera audio/x-pn-realaudioram audio/x-pn-realaudioras image/x-cmu-rasterrgb image/x-rgbrmi audio/midroff application/x-troffrtf application/rtfrtx text/richtextscd application/x-msschedulesct text/scriptletsetpay application/set-payment-initiation setreg application/set-registration-initiation sh application/x-shshar application/x-sharsit application/x-stuffitsnd audio/basicspc application/x-pkcs7-certificates spl application/futuresplashsrc application/x-wais-sourcesst application/vnd.ms-pkicertstore stl application/vnd.ms-pkistlstm text/htmlsvg image/svg+xmlsv4cpio application/x-sv4cpiosv4crc application/x-sv4crcswf application/x-shockwave-flash t application/x-trofftar application/x-tartcl application/x-tcltex application/x-textexi application/x-texinfo texinfo application/x-texinfotgz application/x-compressedtif image/tifftiff image/tifftr application/x-trofftrm application/x-msterminaltsv text/tab-separated-valuestxt text/plainuls text/iulsustar application/x-ustarvcf text/x-vcard。
【IT专家】使用Swift向keychain添加项。
本文由我司收集整编，推荐下载，如有疑问，请与我司联系使用Swift 向keychain 添加项。
2014/06/09 13274 I’m trying to add an item to the iOS keychain using Swift but can’t figure out how to type cast properly. From WWDC 2013 session 709, given the following Objective-C code:我正在尝试使用Swift 向iOS keychain 添加一个项目，但是我不知道如何正确地键入cast。
从WWDC 2013 年第709 届开始，给定以下Objective-C 代码:NSData *secret = [@”top secret”dataWithEncoding:NSUTF8StringEncoding];NSDictionary *query = @{ (id)kSecClass: (id)kSecClassGenericPassword, (id)kSecAttrService: @”myservice”, (id)kSecAttrAccount: @”account name here”,(id)kSecValueData: secret,OSStatus = SecItemAdd((CFDictionaryRef)query, NULL); Attempting to do it in Swift as follows:尝试以以下方式迅速完成:var secret: NSData = “Top Secret”.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)var query: NSDictionary = [ kSecClass: kSecClassGenericPassword, kSecAttrService: “MyService”,kSecAttrAccount: “Some account”,kSecValueData: secret yields the error “Cannot convert the expression’s type‘Dictionary’ to ‘DictionaryLiteralConvertible’.产生错误“无法将表达式的类型’Dictionary’转换为’DictionaryLiteralConvertible’”。
【IT专家】observeValueForKeyPath总是从主线程调用吗？
本文由我司收集整编，推荐下载，如有疑问，请与我司联系observeValueForKeyPath总是从主线程调用吗？observeValueForKeyPath总是从主线程调用吗？[英]Is observeValueForKeyPath always called from the main thread? Is observeValueForKeyPath always called from the main thread? observeValueForKeyPath总是从主线程调用吗? I’m logging calls with 我正在记录电话 -(void) observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context NSLog(@”KVO: isMainThread %d”, [NSThread isMainThread]); // ... and it seems to be printing 1 every time, but I was unable to find any guarantee of this in the docs. Can anyone confirm this is the case? 它似乎每次打印1,但我无法在文档中找到任何保证。
任何人都可以证实这是事实吗? 一般来说,没有。
You receive observeValueForKeyPath:ofObject:change:context: on the thread which changed the value. The setter method that changes the value sends the message to all observers after updating the value and before returning. 您在更改值的线程上收到observeValueForKeyPath:ofObject:change:context:。
【IT专家】在scikit学习中保存和重用TfidfVectorizer
本文由我司收集整编，推荐下载，如有疑问，请与我司联系在scikit 学习中保存和重用TfidfVectorizer在scikit 学习中保存和重用TfidfVectorizer[英]Save and reuse TfidfVectorizer in scikit learn I am using TfidfVectorizer in scikit learn to create a matrix from text data. Now I need to save this object for reusing it later. I tried to use pickle, but it gave the following error.我正在使用scikit 中的TfidfVectorizer 从文本数据创建一个矩阵。
现在我需要保存这个对象，以便以后再使用它。
我尝试使用pickle，但它给出了以下错误。
loc=open(‘vectorizer.obj’,’w’)pickle.dump(self.vectorizer,loc)***TypeError: can’t pickle instancemethod objects I tried using joblib in sklearn.externals, which again gave similar error. Is there any way to save this object so that I can reuse it later?我试着在sklearn 上使用joblib。
外部性，再次出现类似的错误。
有什么方法可以保存这个对象，以便以后我可以重用它?Here is my full object:这是我的全部目标:class changeToMatrix(object):def__init__(self,ngram_range=(1,1),tokenizer=StemTokenizer()): from sklearn.feature_extraction.text import TfidfVectorizer self.vectorizer = TfidfVectorizer(ngram_range=ngram_range,analyzer=‘word’,lowercase=True,\token_pattern=‘[a-zA-Z0-9]+’,strip_accents=‘unicode’,tokenizer=tokenizer)defload_ref_text(self,text_file): textfile = open(text_file,’r’)lines=textfile.readlines() textfile.close() lines = ‘‘.join(lines)sent_tokenizer = nltk.data.load(‘tokenizers/punkt/english.pickle’)sentences = [ sent_tokenizer.tokenize(lines.strip()) ] sentences1 = [item.strip().strip(‘.’)for sublist in sentences for item in sublist]chk2=pd.DataFrame(self.vectorizer.fit_transform(sentences1).toarray()) #vectorizer is transformed in this step return sentences1,[chk2]defget_processed_data(self,data_loc):。
object 用法
object 用法Object is a versatile and important concept in programming. It is a fundamental building block of Object-Oriented Programming (OOP), and understanding its usage is crucial for developers. In this article, we will explore the various aspects of object usage and explain its significance in software development.What is an object?In programming, an object is an instance of a class, which serves as a blueprint for creating objects. It encapsulates both data (attributes or properties) and behaviors (methods or functions). Objects are the basic units of modular programming, allowing us to implement real-world entities or abstract concepts in our code.Creating an object in programming involves two steps: defining a class and instantiating objects from it. A class acts as a template or prototype that defines the structure and behavior of objects, while an object represents a specific instance of that class.The class definition includes attributes and methods. The attributes are variables that store data, while methods are functions that define the behavior or actions of the object. For example, let's consider a class called "Car" that represents different car objects. It might have attributes like "color", "brand", and "year", and methods like "accelerate", "brake", and "changeGear".How to create objects?In most programming languages, creating an object involves usingthe "new" keyword followed by the class name and optional parentheses. For example, in Java, we can create an object of the "Car" class using the following code:```Car myCar = new Car();```Here, "myCar" is the object variable that references the new instance of the "Car" class. We can then access the attributes and methods of the object using the dot (.) operator. For example, to access the "color" attribute, we can use:```String myCarColor = myCar.color;```Similarly, to call the "accelerate" method, we can use:```myCar.accelerate();```This way, objects provide a way to represent and manipulate real-world entities or concepts in our code.Encapsulation and data hidingOne of the key principles of OOP is encapsulation, which allows us to bundle data and methods into a single entity. Encapsulationprevents direct access to the internal state of an object, ensuring that data is accessed and modified through defined methods only. This concept is also known as data hiding.Data hiding provides several benefits. It enhances security by protecting sensitive data from unauthorized access. It also promotes code reusability as objects can be easily reused in different contexts without worrying about internal implementation details. Additionally, encapsulation helps to organize code by grouping related data and methods together, improving overall code maintainability.For example, consider a class called "BankAccount" that represents a bank account object. The class may have attributes like "accountNumber" and "balance", and methods like "deposit" and "withdraw". By encapsulating these attributes and methods within the class, we ensure that they are accessed and modified in a controlled manner.Inheritance and code reuseAnother important feature of OOP is inheritance, which allows a class to inherit attributes and methods from another class. Inheritance promotes code reuse and helps to establish a hierarchical relationship between classes.Inheritance is represented using the "extends" keyword in most programming languages. The class that provides inherited members is called the superclass or base class, while the class that inherits those members is called the subclass or derived class.By inheriting attributes and methods from a superclass, a subclass can reuse the existing code and extend it to add or modify functionality as per its specific requirements. This helps in reducing code duplication and improving code maintainability.For example, consider a superclass called "Animal" that has attributes and methods common to all animals. We can then create specific subclasses like "Cat" and "Dog" that inherit from the "Animal" class. The subclasses can add their own attributes and methods, such as "sound" and "walk", while inheriting the common attributes and methods from the superclass.Polymorphism and code flexibilityPolymorphism is a powerful concept in OOP that allows objects of different classes to be treated as objects of a common superclass. It enables code flexibility and simplifies code maintenance. Polymorphism is achieved through method overriding and method overloading. Method overriding involves defining a method in a subclass that has the same name and parameters as a method in the superclass. This allows the method to be dynamically dispatched and executed based on the runtime type of the object.Method overloading, on the other hand, involves defining multiple methods with the same name but different parameters in a class. This allows the same method name to be used for different purposes, enhancing code readability and reducing the number of method names.Polymorphism allows us to write code that works with objects of different classes without the need for explicit type checking or casting. This improves code modularity and flexibility, enabling easier modifications and additions to the codebase.For example, consider a superclass called "Shape" that has a method called "calculateArea". We can create subclasses like "Circle" and "Rectangle" that override the "calculateArea" method to provide their own implementation based on their specific shapes. By treating objects of both subclasses as objects of the superclass, we can write code that works with different shapes interchangeably.ConclusionIn conclusion, objects play a pivotal role in software development. They allow us to represent real-world entities or abstract concepts in our code and provide a structured approach to modular programming. Through encapsulation, data hiding, inheritance, polymorphism, and other OOP principles, objects promote code reusability, improve code maintainability, and enhance code flexibility. By mastering object usage, developers can create robust and scalable software applications. So, embrace objects and harness their power in your programming journey.。
【IT专家】Sea.js出现Uncaught TypeError- object is not a function的解决方法
本文由我司收集整编，推荐下载，如有疑问，请与我司联系Sea.js出现Uncaught TypeError: object is not a function的解决方法2015/10/26 846 此文章转载自：tonitech/2279.html，转载请注明出处。
最近我有一个项目需要用到seajs+jquery+underscore来开发前端页面，是第一次使用seajs做项目。
一开始使用就遇到了：Uncaught TypeError: object is not a function 的问题，这个问题到谷歌上搜索之后是一大片的，github上玉伯也有给出耐心的解答。
后来我发现遇到这个问题就是两个原因：1、引用的第三方类库的路径不对。
2、没有将第三方非CMD规范的类库定义成CMD的模块 假设我们现在jQuery无法引入，首先我们要检查第一点路径是否正确，打开浏览器的控制台，在控制台输入 seajs.resolve(‘jquery’) 参数中的jQuery是你在配置中alias里面写的别名，敲回车之后你会发现控制台会输出jQuery的路径，你需要访问一下这条路径，假设这条路径有jQuery的代码，说明你的路径正确，否者你得修改你的路径，理论上路径是相对于sea.js的。
如果你的路径正确，那么你需要将第三方非CMD规范的类库定义成CMD的模块：jQuery的定义方法： define(function() {//def CMD /*jquery 自身的代码*/ return $.noConflict();});//end CMD jQuery插件的定义方法： define(function() { //def CMD return function($) { /*jQuery插件的自身代码*/});//end CMD // 调用的时候使用require要将jquery的传入var $ = require(‘jquery’);require(‘jquery.XXX.js’)($); underscore.js的定义方法： define(function() {//def CMD /*underscore自己的代码*/ return _.noConflict();});//end CMD 对于自己的代码： define(function() {//def CMD /*自身的代码*/ return XXX;});//end CMDtips:感谢大家的阅读，本文由我司收集整编。
【IT专家】有关enumerate、block遍历与NSEnumerator枚举器在NSString、NSArray、NSDictionary中的使用总结
本文由我司收集整编，推荐下载，如有疑问，请与我司联系有关enumerate、block 遍历与NSEnumerator 枚举器在NSString、NSArray、NSDictionary 中的使用总结2017/03/09 0enumerateObjectsUsingBlock 修改局部变量时，你需要声明局部变量为__block类型.enumerateObjectsWithOptions:usingBlock:支持并发迭代或反向迭代，并发迭代时效率也非常高.参考：blog.csdn/wm9028/article/details/51733308NSArray 的其他用法可参考：blog.csdn/quanqinyang/article/details/19555721 一：enumerate 在NSString、NSArray、NSDictionary 中的使用参数说明：使用block 块遍历整个数组，id obj 表示数组中的元素，NSUInteger idx 标示元素的下标，bool *stop 是一个bool 类型的参数。
1、在NSString 中官方的方法：NSString 中：-(void)enumerateSubstringsInRange:(NSRange)rangeoptions:(NSStringEnumerationOptio ockNS_AVAILABLE(10_6,4_0); //与(for(... in ...)在效率上基本一致，有时会快些／／例如：[objc]view plaincopy//字符串NSString*filePath=[[NSBundlemainBundle]pathForResource:@ girl ofType:@ txt ];NSData*fileData=[NSDatadataWithContentsOfFile:filePath];NSString*fileStr=[的（有两个方法）：- (NSEnumerator KeyType *)keyEnumerator;//获取所有key - (NSEnumerator ObjectType *)objectEnumerator;//获取所有value 示例：NSDictionary*myDic=[[NSDictionaryalloc]initWithObjectsAndKeys:@ 张三,@ name ,@ 李四,@ name ,nil]; NSUIntegercount= myDic.count; NSLog(@ 词典的数量为：%lu ,count); NSEnumerator*myEnumerator= myDic.keyEnumerator;//获取所有key for(NSObject*objectinmyEnumerator){。
【IT专家】不兼容整数到指针的转换,从'int'分配到'int -'
本文由我司收集整编，推荐下载，如有疑问，请与我司联系不兼容整数到指针的转换，从’int’分配到’int *’ 不兼容整数到指针的转换，从’int’分配到’int *’[英]Incompatible integer to pointer conversion assigning to ‘int *’ from ‘int’ I have yet another pesky warning I would like gone. Basically, I have an int declared like this: @property (nonatomic, assign) int *myInt; and set like this: myInt = 0;. It is also synthesized in the implementation file. I am getting a warning on the line where I set the int’s value and it says Incompatible intiger to pointer conversion assigning to ‘int *’ from ‘int’. What should I do to fix this? 我还有另一个讨厌的警告想要离开。
基本上，我有一个int类型声明如下:@property (nonatomic, assign) int *myInt;设为:myInt = 0;它也在实现文件中被合成。
在我设置int值的行上，我得到了一个警告，它表示不兼容的intiger指针转换为“int *”，从“int”到“int”。
我该怎么解决这个问题呢? 56 There’s a big hint in the error message! 错误消息中有一个很大的提示! In C and Objective C, an int is a primitive data type. You’ve written int *, which means “a pointer to an int”, whereas it looks like you just wanted an int. 在C和Objective C中，int是一种原始数据类型。
英文object的汉语是什么意思
英文object的汉语是什么意思object的汉语意思英 [ˈɒbdʒɪkt] 美 [ˈ��:bdʒekt]名词物体; 目标; 宾语; 客体，对象不及物动词不赞成，反对; 抱反感及物动词提出…作反对的理由相关例句及物动词1. It was objected that this severe measure might hurt people's feelings.有人提出反对，说这个严厉的措施可能伤害人们的感情。
不及物动词1. I object to the proposal.我反对这个提议。
2. No one objected to the plan.没有人反对这项计划。
object的词典解释1. 物体;东西An object is anything that has a fixed shape or form, that you can touch or see, and that is not alive.e.g. He squinted his eyes as though he were studying an object on the horizon.他眯起眼睛，就好像在端详地平线上的某一物体。
e.g. ...an object the shape of a coconut...形似椰子的物体2. 目的;目标;宗旨The object of what someone is doing is their aim or purpose.e.g. The object of the exercise is to raise money for the charity...那样做旨在筹集善款。
e.g. He made it his object in life to find the island...他把找到那座岛屿当成自己的人生目标。
3. (情感或反应的)对象The object of a particular feeling or reaction is the person or thing it is directed towards or that causes it.e.g. The object of her hatred was 24-year-old model Ros French...令她心头生恨的是24岁的模特罗斯·弗伦奇。
【IT专家】什么是下划线功能？
本文由我司收集整编，推荐下载，如有疑问，请与我司联系什么是下划线功能？2013/05/04 542 I’ve been using underscore as a collection of statics.我一直在使用下划线作为静态的集合。
What is the underscore function for:什么是下划线功能:var _ = function(obj) { if (obj instanceof _) return obj; if (!(this instanceof _)) return new _(obj); this._wrapped = obj; What is an example of how you would use this?你将如何使用它的例子是什么?4You also can use Underscore as a wrapper function, to get a more OOP-like style:您还可以使用Underscore 作为包装函数,以获得更像OOP 的样式:_(val).method(…);// instead of the equal_.method(val, …); These wrapper objects also allow chaining:这些包装器对象也允许链接:_.chain(val).method1(…).method2(…);//or_(val).chain().method1(…).method2(…);And then use Underscore functions on the wrapped object:然后在包装对象上使用Underscore 函数:_([1, 2, 3, 4]).shuffle()tips:感谢大家的阅读，本文由我司收集整编。
仅供参阅！。
【IT专家】如何知道用户是否从iPhone设置中删除我的自定义键盘？
本文由我司收集整编，推荐下载，如有疑问，请与我司联系如何知道用户是否从iPhone 设置中删除我的自定义键盘？如何知道用户是否从iPhone 设置中删除我的自定义键盘？[英]How to know if user remove my custom keyboard from iPhone settings? How do I know if user removemy custom keyboard from iPhone settings.我如何知道用户是否从iPhone 设置中删除了我的自定义键盘。
I have to manage some user default value after my keyboard has been removed.我的键盘被删除后,我必须管理一些用户默认值。
1static func isKeyboardInstalled() - Bool { var isInstalled = false if let dict: AnyObject = NSUserDefaults.standardUserDefaults().dictionaryRepresentation() { let userDefaultsDictionary: Dictionary String, AnyObject = dict as! Dictionary String, AnyObject let keyboardArrayAnyObject: AnyObject? = userDefaultsDictionary[“AppleKeyboards”]if let array: AnyObject = keyboardArrayAnyObject { let keyboardsArray: Array String = array as! Array String let appUrlSceme: String? = SystemUtils.applicationIdentifier() if let urlScheme = appUrlSceme { for item in keyboardsArray { if (item as NSString).containsString(urlScheme) { isInstalled = true return isInstalled static func applicationIdentifier() - String? { var appIdentifier: String? = nil if let identifier = NSBundle.mainBundle().objectForInfoDictionaryKey(kCFBundleIdentifierKey as String) as? String { appIdentifier = identifier return appIdentifiertips:感谢大家的阅读，本文由我司收集整编。
object的用法和短语例句
object的用法和短语例句object有物体;目标;对象;反对;提出 ... 作为反对的理由等意思，那么你知道object的用法吗?下面跟着店铺一起来学习一下，希望对大家的学习有所帮助!object的用法大全：object的用法1：object的基本意思是“物体”,指可见到或可触摸到的实物。
object的用法2：object也可作“对象”“客体”解,指行为、感觉或思想所及的人或事物,常与介词of搭配使用。
object的用法3：object还可作“目标,意向,目的”解,常指抽象的一般性质的目的。
object的用法4：在英国口语中, object可指“可笑的人或事物”。
object的用法5：object的基本意思是“由于某种原因不赞成某事”,引申可作“讨厌”解。
object的用法6：object可用作及物动词,也可用作不及物动词。
用作及物动词时,其后不可直接接名词或代词作宾语,可接宾语从句,表示“提出反对…的理由”,即object之后的宾语从句不是“反对的内容”,而是“反对的理由”; 用作不及物动词时,后面须接介词against或to,表示“不赞成、反对的具体内容或对象”,介词后可接名词、代词或动名词。
object的用法7：在非正式语体中, object可接动词不定式。
不过初学者应慎用。
object的常用短语：用作名词 (n.)no object用作动词 (v.)object against (v.+prep.)object to (v.+prep.)object的用法例句：1. He thought of the baby almost as an inanimate object.他认为婴儿几乎就是毫无生命的物体。
2. He made it his object in life to find the island.他把找到那座岛屿当成自己的人生目标。
3. My object was to publish a scholarly work on Peter Mourne.我的目标是出版一本关于彼得·莫恩的学术著作。
object的意思用法总结
object的意思用法总结object的意思你知道是什么吗?那么它的用法是怎样的呢?今日我给大家带来了object的用法,盼望能够关心到大家，一起来学习吧。
object的意思n. 物体,目标,宾语,客体，对象变形：过去式: objected; 现在分词：objecting; 过去分词：objected;object用法object可以用作名词object的基本意思是“物体”,指可见到或可触摸到的实物。
object也可作“对象”“客体”解,指行为、感觉或思想所及的人或事物,常与介词of搭配使用。
object还可作“目标,意向,目的”解,常指抽象的一般性质的目的。
object用作名词的用法例句Various objects were on the table.桌子上摆着各种各样的物体。
His one object in life is to earn as much money as possible.一生中的他的一个目标将挣得尽可能多的钱。
This church is the main object of his interest.他最感爱好的是这座教堂。
object可以用作动词object的基本意思是“由于某种缘由不赞成某事”,引申可作“厌烦”解。
object可用作及物动词,也可用作不及物动词。
用作及物动词时,其后不行直接接名词或代词作宾语,可接宾语从句,表示“提出反对…的理由”,即object之后的宾语从句不是“反对的内容”,而是“反对的理由”; 用作不及物动词时,后面须接介词against或to,表示“不赞成、反对的详细内容或对象”,介词后可接名词、代词或动名词。
在非正式语体中, object可接动词不定式。
不过初学者应慎用。
object用作动词的用法例句In the final analysis, I object to the proposal.归根结底,我反对这个建议。
I objected that he was too young for the job.我反对的理由是由于他太年轻,不适合做那份工作。
【IT专家】如何解决iOS中的视频定位问题
本文由我司收集整编，推荐下载，如有疑问，请与我司联系如何解决iOS中的视频定位问题2013/04/20 4539 I am working with an app in which user picks video from Photos and uploads it to server. As my server is .Net server , the video gets rotated. I know the reason of problem is probably same as was in case of image (you may refer my earlier answer https://stackoverflow/a/10601175/1030951 ) , So i googled and got a code to fix video orientation , I got a code from RayWenderlich and modified in following way. Now my output video works fine but the video is mute. it plays but doesn’t play audio. Kindly help me if I am missing something. 我正在使用一个应用程序，用户从照片中选择视频并将其上传到服务器。
由于我的服务器是.Net服务器，因此视频会轮换。
我知道问题的原因可能与图像的情况相同（你可以参考我之前的答案https://stackoverflow/a/10601175/1030951），因此我用谷歌搜索并得到一个代码来修复视频方向，我从RayWenderlich获得代码并按以下方式修改。
现在我的输出视频工作正常，但视频是静音。
它播放但不播放音频。
如果我错过了什么，请帮助我。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
本文由我司收集整编，推荐下载，如有疑问，请与我司联系
object
2015/12/10 1539 之前一直都是写Java的，最近业务发展需要，打算着手做iOS开发了，在网上查找了很多资源，作为一个Java开发者，简单对比语言之间的差异还是很有必要的。
这样更容易熟悉新的东西。
object-c的一些点object-c通常写作objective-c或者obj-c，是根据C语言所衍生出来的语言，继承了C语言的特性，是扩充C的面向对象编程语言。
java的一些点Java是一种简单的，跨平台的，面向对象的，分布式的，解释的，健壮的安全的，结构的中立的，可移植的，性能很优异的多线程的，动态的语言。
Java分为三个体系Java SE（J2SE，Java2 Platform Standard Edition，标准版），JavaEE（J2EE，Java 2 Platform, Enterprise Edition，企业版），Java ME （J2ME，Java 2 Platform Micro Edition，微型版）。
Java通过JDBC为多种关系数据库提供统一访问，JDBC是一种用于执行SQL语句的Java API，它由一组用Java语言编写的类和接口组成。
一些相同点在与c＋＋对比上，他们有相同的地方，没有c＋＋的指针、运算符重载、类的多继承。
java 和object-c 都区分大小写，并且都是采用驼峰命名法。
java和object-c都有异常处理
一些对比点java没有指针，object-c中所有对象都是指针的形式。
java含有构造方法和析构方法finalize ，对比object-c相当于init方法和dealloc方法。
java 是通过set和get方法来访问成员变量，java的成员变量是在类体的变量部分中定义的变量，也称为属性。
成员变量又称全局变量，定义在类中，和类的方法处于同一个层次。
object-c的属性也是类似概念，它通过@property与@synthesize配对使用来实现属性概念，并且默认实现setter和getter方法。
java中包是类和接口的集合，这相当于object-c中的framework。
java通过输入流和输出流来读写文件，object-c则通过更简单的NSData来实现。
java是通过jvm来进行垃圾回收的，objective-c则通过ARC的机制进行自动内存管理。
java和object-c是如何实现多继承的？java中不可以继承多个父类，但是可。