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In Objective-C instance data can be public, protected or private. For example: @interface Foo : NSObject { @public ... to limit the visibility of data in Swift? Question&Answers:os...

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

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341 views

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c# - Unable to update the EntitySet - because it has a DefiningQuery and no <UpdateFunction> element exist

I am using Entity Framework 1 with .net 3.5. I am doing something simple like this: var roomDetails = context. ... alas, I do have a Primary key declared... Question&Answers:os...

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

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c++98 - Are Exceptions in C++ really slow

I was watching Systematic Error Handling in C++—Andrei Alexandrescu he claims that Exceptions in C++ are very very slow. Is this still true for C++98? Question&Answers:os...

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

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How to swap two variables in JavaScript

I have this two variables: var a = 1, b = 2; My question is how to swap them? Only this variables, not any objects. Question&Answers:os...

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

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141 views

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Calculating Page Load Time In JavaScript

I am trying to make a webpage that, when it starts loading, uses an Interval to start a timer. When ... problem above with incorrect numbers still exists. Why? Question&Answers:os...

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

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windows - How to run a PowerShell script from a batch file

I am trying to run this script in PowerShell. I have saved the below script as ps.ps1 on my desktop. ... UsersSEDesktopps.ps1 pause But I am getting this error: Question&Answers:os...

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

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javascript function leading bang ! syntax

I've been seeing this syntax on a few libraries now and I'm wondering what the benefit is. (note i'm well ... tell me why one might use the first syntax? Question&Answers:os...

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

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c++ - How to use stringstream to separate comma separated strings

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

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algorithm - How are ssl certificates verified?

What is the series of steps needed to securely verify a ssl certificate? My (very limited) understanding is ... -middle attacks, so everything "looks" secure? Question&Answers:os...

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

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c++ - What is stack unwinding?

What is stack unwinding? Searched through but couldn't find enlightening answer! Question&Answers:os...

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

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git - Remove specific commit

I was working with a friend on a project, and he edited a bunch of files that shouldn't have been edited. Somehow ... or 'git rm <paths>' and commit the result. Question&Answers:os...

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

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How to do an update + join in PostgreSQL?

Basically, I want to do this: update vehicles_vehicle v join shipments_shipment s on v.shipment_id=s.id set v.price ... , how would I write this In PostgreSQL? Question&Answers:os...

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

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python - Selecting a row of pandas series/dataframe by integer index

I am curious as to why df[2] is not supported, while df.ix[2] and df[2:3] both work. In [ ... design reason for not supporting indexing row by single integer? Question&Answers:os...

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

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What do the arrow icons in Subclipse mean?

What do the icons in the following screen capture mean? The icons are from Subclipse, an SVN plugin for Eclipse. I'm ... just doesn't seem to be one out there. Question&Answers:os...

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

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objective c - Managing multiple asynchronous NSURLConnection connections

I have a ton of repeating code in my class that looks like the following: NSURLConnection *connection = ... a class that handles multiple asynchronous requests. Question&Answers:os...

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

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242 views

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python - How to convert SQL Query result to PANDAS Data Structure?

Any help on this problem will be greatly appreciated. So basically I want to run a query to my SQL database ... and how to put it with PANDAS data structure. Question&Answers:os...

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

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nlp - Detecting syllables in a word

I need to find a fairly efficient way to detect syllables in a word. E.g., Invisible -> in-vi-sib-le There are ... +, C#, Python, Perl... would work for me. Question&Answers:os...

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

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518 views

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geocoding - How to calculate the bounding box for a given lat/lng location?

I have given a location defined by latitude and longitude. Now i want to calculate a bounding box within e. ... solution which shows me the distance of 2 points Question&Answers:os...

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

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490 views

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linux - Static link of shared library function in gcc

How can I link a shared library function statically in gcc? Question&Answers:os...

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

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122 views

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javascript - Get and Set a Single Cookie with Node.js HTTP Server

I want to be able to set a single cookie, and read that single cookie with each request made to the nodejs ... from nodejs.org, and work a cookie into it. Question&Answers:os...

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

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200 views

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java - How set background drawable programmatically in Android

To set Background: RelativeLayout layout =(RelativeLayout)findViewById(R.id.background); layout.setBackgroundResource(R.drawable. ... the best way to do it? Question&Answers:os...

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

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266 views

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Remove HTML tags not on an allowed list from a Python string

I have a string containing text and HTML. I want to remove or otherwise disable some HTML tags, such as < ... I process the string to remove any other tags? Question&Answers:os...

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

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129 views

1 answer

Branch descriptions in Git

Is there a way in Git to have a 'description' for branches? While I try to use descriptive names, working for ... the purpose of the branch) would be nice. Question&Answers:os...

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

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249 views

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multithreading - What is a semaphore?

A semaphore is a programming concept that is frequently used to solve multi-threading problems. My question to the ... a semaphore and how do you use it? Question&Answers:os...

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

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296 views

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performance - Threads vs Processes in Linux

I've recently heard a few people say that in Linux, it is almost always better to use processes instead of ... I use processes or threads (or a combination)? 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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linux - Docker can't connect to docker daemon

After I update my Docker version to 0.8.0, I get an error message while entering sudo docker version: Client ... file or directory How do I solve the problem? Question&Answers:os...

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

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273 views

1 answer

image processing - Face recognition Library

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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796 views

1 answer

optimization - Most efficient way to increment a Map value in Java

I hope this question is not considered too basic for this forum, but we'll see. I'm wondering how to refactor ... a test of several of the answers. See below. Question&Answers:os...

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

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