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Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in Java

I'd like to know the difference between the following in Java System.exit(0); System.exit(-1); System.exit(1 ... do I have to use the above code appropriately? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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What is the best (idiomatic) way to check the type of a Python variable?

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What's the difference between session.persist() and session.save() in Hibernate?

Can anyone tell me what's the advantage of persist() vs save() in Hibernate? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iphone - Xcode 4 - "Valid signing identity not found" error on provisioning profiles on a new Macintosh install

I had a Macintosh I used to develop iPhone apps with using Xcode 4. I now have a new Macintosh ... having entered my provisioning portal login and password : Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Lambda function in list comprehensions

Why is the output of the following two list comprehensions different, even though f and the lambda function are the same? ... x: x*x) return the same type. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - jQuery UI Sortable, then write order into a database

I want to use the jQuery UI sortable function to allow users to set an order and then on change, write it to ... write an example on how this would be done? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Begin, Rescue and Ensure in Ruby?

I've recently started programming in Ruby, and I am looking at exception handling. I was wondering if ensure was ... what, even if an exception isn't raised? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - What is the runtime performance cost of a Docker container?

I'd like to comprehensively understand the run-time performance cost of a Docker container. I've found references ... a disk directly vs. virtually in Docker. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Entity Framework VS LINQ to SQL VS ADO.NET with stored procedures?

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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lint - What is "Linting"?

PHPLint, JSLint, and I recently came across "you can lint your JS code on the fly" while reading something about some IDE. So, what is "linting"? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to use PHP OPCache?

PHP 5.5 has been released and it features a new code caching module called OPCache, but there doesn't appear ... documentation for it and how do I use OPcache? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Cannot truncate table because it is being referenced by a FOREIGN KEY constraint?

Using MSSQL2005, can I truncate a table with a foreign key constraint if I first truncate the child table ( ... is being referenced by a FOREIGN KEY constraint. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JAX-RS — How to return JSON and HTTP status code together?

I'm writing a REST web app (NetBeans 6.9, JAX-RS, TopLink Essentials) and trying to return JSON and HTTP ... HTTP status codes not be used for such thing? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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macos - How to install 2 Anacondas (Python 2 and 3) on Mac OS

I'm relatively new in Mac OS. I've just installed XCode (for c++ compiler) and Anaconda with the ... something like conda2 install scikit-learn for Python 2. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Is it possible to break a long line to multiple lines in Python?

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - Build and Install unsigned apk on device without the development server?

As I am new in react-native so if there is anything wrong in steps let me know. I have build a react ... that how to build and unsigned apk in react native? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - How to drop a table if it exists?

The table name is Scores. Is it correct to do the following? IF EXISTS(SELECT * FROM dbo.Scores) DROP TABLE dbo.Scores Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Global Events in Angular

Is there no equivalent to $scope.emit() or $scope.broadcast() in Angular? I know the EventEmitter functionality, ... and an element nested several levels deep? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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457 views

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c# - Synchronously waiting for an async operation, and why does Wait() freeze the program here

Preface: I'm looking for an explanation, not just a solution. I already know the solution. Despite having spent ... object? Is there a non-obvious deadlock? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How to handle Handler messages when activity/fragment is paused

Slight variation on my other posting Basically I have a message Handler in my Fragment which receives a bunch ... the framework to handle this more elegantly. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How can I wait In Node.js (JavaScript)? l need to pause for a period of time

I'm developing a console script for personal needs. I need to be able to pause for an extended amount of time, ... this. How can I achieve this extended pause? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Throwing exceptions from constructors

I'm having a debate with a co-worker about throwing exceptions from constructors, and thought I would like some ... use exceptions for such a low level object. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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244 views

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algorithm - Breadth First Vs Depth First

When Traversing a Tree/Graph what is the difference between Breadth First and Depth first? Any coding or pseudocode examples would be great. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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78 views

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css - How to include view/partial specific styling in AngularJS

What is the proper/accepted way to use separate stylesheets for the various views my application uses? Currently ... 's $routeProvider.when? Thanks in advance! Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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273 views

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Show Current Location and Nearby Places and Route between two places using Google Maps API in Android

I need to develop an application using Google Maps in Android to locate my current location and need to find ... give some suggestion,links,tutorial to do that? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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79 views

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c# - If a folder does not exist, create it

I use a FileUploader control in my application. I want to save a file to a specified folder. If this folder does not ... the file in it. How can I do this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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101 views

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javascript - Check if object is a jQuery object

Is there a fast way of checking if an object is a jQuery object or a native JavaScript object? example: var o = ... in line with (typeof obj == 'jquery') Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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167 views

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java - Building executable jar with maven?

I am trying to generate an executable jar for a small home project called "logmanager" using maven ... <dependencyManagement> </dependencyManagement> </project> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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