OStack Q&A-Knowledge Sharing Community

0 votes

156 views

1 answer

sql - Can I concatenate multiple MySQL rows into one field?

Using MySQL, I can do something like: SELECT hobbies FROM peoples_hobbies WHERE person_id = 5; My Output: shopping ... does anyone here know how to do this? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

108 views

1 answer

c - How dangerous is it to access an array out of bounds?

How dangerous is accessing an array outside of its bounds (in C)? It can sometimes happen that I read from outside the ... safely? I use OSX 10.7, Xcode 4.6. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

174 views

1 answer

java - com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

I'm working on getting my database to talk to my Java programs. Can someone give me a quick and dirty sample ... ); System.out.println("Connected?"); } } Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

201 views

1 answer

Algorithm to return all combinations of k elements from n

I want to write a function that takes an array of letters as an argument and a number of those letters to ... words) in return consisting of 3 letters each. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

227 views

1 answer

c# - How to configure an app to run correctly on a machine with a high DPI setting (e.g. 150%)?

I've created a simple Winforms application in C#. When I run the application on a machine with high DPI settings ... 's title bar is rendered crisp & clear. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

258 views

1 answer

Facebook Graph API v2.0+ - /me/friends returns empty, or only friends who also use my application

I am trying to get my friend name and ids with Graph API v2.0, but data returns empty: { "data": [ ] } When ... friend.id); } }]; But now I cannot get friends! Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

296 views

1 answer

Regex: match everything but specific pattern

I need a regex able to match everything but a string starting with a specific pattern (specifically index.php and what follows, like index.php?id=2342343) Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

243 views

1 answer

python - Why does comparing strings using either '==' or 'is' sometimes produce a different result?

I've got a Python program where two variables are set to the value 'public'. In a conditional expression I have the ... > s2 is s1 True What am I missing here? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

215 views

1 answer

Android Shared preferences for creating one time activity (example)

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

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

69 views

1 answer

php - How should a model be structured in MVC?

Closed. This question is opinion-based. It is not currently accepting answers. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

153 views

1 answer

javascript - Is it possible for flex items to align tightly to the items above them?

This is, in effect, the Pinterest layout. However, the solutions found online are wrapped in columns, which means ... to resort to a JS solution like Masonry? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

261 views

1 answer

c# - Why are mutable structs “evil”?

Following the discussions here on SO I already read several times the remark that mutable structs are evil ( ... problem with mutability and structs in C#? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

384 views

1 answer

html - Make container shrink-to-fit child elements as they wrap

I'm trying to figure out how flexbox works (supposed to work? ) for cases like below: .holder { width: 500px; ... ">Forms & <br>documents</div> </div> Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

203 views

1 answer

.net - Deserialize JSON into C# dynamic object?

Is there a way to deserialize JSON content into a C# dynamic type? It would be nice to skip ... of classes in order to use the DataContractJsonSerializer. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

994 views

1 answer

foreach - How does the Java 'for each' loop work?

Consider: List<String> someList = new ArrayList<String>(); // add "monkey", "donkey", "skeleton key" to ... loop look like without using the for each syntax? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

153 views

1 answer

Can you provide some examples of why it is hard to parse XML and HTML with a regex?

Closed. This question needs to be more focused. It is not currently accepting answers. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

164 views

1 answer

security - The definitive guide to form-based website authentication

Closed. This question needs to be more focused. It is not currently accepting answers. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

81 views

1 answer

javascript - How to make an AJAX call without jQuery?

How to make an AJAX call using JavaScript, without using jQuery? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

238 views

1 answer

debugging - How can I get useful error messages in PHP?

Quite often I will try and run a PHP script and just get a blank screen back. No error message; just an ... to produce a useful error message, like Java does? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

236 views

1 answer

Use dynamic variable names in JavaScript

In PHP you can do amazing/horrendous things like this: $a = 1; $b = 2; $c = 3; $name = 'a'; echo ... can I get a reference to the variable with name name? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

46 views

1 answer

How to get the difference between two arrays in JavaScript?

Is there a way to return the difference between two arrays in JavaScript? For example: var a1 = ['a', 'b']; var a2 = ['a', 'b', 'c', 'd']; // need ["c", "d"] Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

110 views

1 answer

android - Is quitting an application frowned upon?

Moving on in my attempt to learn Android, I just read the following: Question: Does the user have a choice to ... a way for me to really quit the application? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

313 views

1 answer

coding style - Are PHP short tags acceptable to use?

Here's the information according to the official documentation: There are four different pairs of opening and closing ... , so why are they not recommended? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

195 views

1 answer

javascript - What is DOM Event delegation?

Can anyone please explain event delegation in JavaScript and how is it useful? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

183 views

1 answer

javascript - What is event bubbling and capturing?

What is the difference between event bubbling and capturing? When should one use bubbling vs capturing? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.1k views

1 answer

dynamic languages - How does JavaScript .prototype work?

I'm not that into dynamic programming languages but I've written my fair share of JavaScript code. I never really ... OK Also these slides really helped a lot. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

91 views

1 answer

c++ - How to access a local variable from a different function using pointers?

May I have any access to a local variable in a different function? If so, how? void replaceNumberAndPrint(int array[ ... to access it more than the first time? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

150 views

1 answer

c# - How do I properly clean up Excel interop objects?

I'm using the Excel interop in C# (ApplicationClass) and have placed the following code in my finally ... ensure interop objects are properly disposed of? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

Categories

Recent questions

Just Browsing Browsing

Most popular tags