OStack Q&A-Knowledge Sharing Community

0 votes

1.3k views

1 answer

keyboard - How do you tell if caps lock is on using JavaScript?

How do you tell if caps lock is on using JavaScript? One caveat though: I did google it and the best solution I ... - surely there's a better way than this? Question&Answers:os...

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

0 votes

242 views

1 answer

c++ - What's the difference between assignment operator and copy constructor?

I don't understand the difference between assignment constructor and copy constructor in C++. It is like ... of the assignment constructor and copy constructor? Question&Answers:os...

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

0 votes

469 views

1 answer

objective c - How do I add 1 day to an NSDate?

Basically, as the title says. I'm wondering how I could add 1 day to an NSDate. So if it were: 21st ... 31st December 2011 It would become: 1st January 2012. Question&Answers:os...

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

0 votes

261 views

1 answer

java - Any reason to prefer getClass() over instanceof when generating .equals()?

I'm using Eclipse to generate .equals() and .hashCode(), and there is an option labeled "Use 'instanceof' to compare ... Is there any reason that's a bad idea? Question&Answers:os...

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

0 votes

425 views

1 answer

arrays - What does [].forEach.call() do in JavaScript?

I was looking at some snippets of code, and I found multiple elements calling a function over a node list with ... front of the forEach and how the call works? Question&Answers:os...

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

0 votes

7.4k views

1 answer

PHP Regex to get youtube video ID?

Can someone show me how to get the youtube id out of a url regardless of what other GET variables are in the ... =related So between v= and before the next & Question&Answers:os...

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

0 votes

186 views

1 answer

c++ - What is the advantage of using forwarding references in range-based for loops?

const auto& would suffice if I want to perform read-only operations. However, I have bumped into for (auto&& e ... want to use auto&& in range-based for loops? Question&Answers:os...

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

0 votes

195 views

1 answer

c# - Entity Framework .Remove() vs. .DeleteObject()

You can remove an item from a database using EF by using the following two methods. EntityCollection.Remove Method ... a bool and DeleteObject() returns void. Question&Answers:os...

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

0 votes

81 views

1 answer

java - Maven Run Project

Is there a Maven "phase" or "goal" to simply execute the main method of a Java class? I have a project ... manually by simply doing something like "mvn run". Question&Answers:os...

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

0 votes

290 views

1 answer

linux - How to remove the lines which appear on file B from another file A?

I have a large file A (consisting of emails), one line for each mail. I also have another file B that contains ... one-liner, but I'm not the shell expert. Question&Answers:os...

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

0 votes

242 views

1 answer

python - Why does checking a variable against multiple values with `OR` only check the first value?

This question already has answers here: Question&Answers:os...

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

0 votes

297 views

1 answer

python - How to remove relative shift in matplotlib axis

When I try to do a plot against a range with big enough numbers I get an axis with relative shift for all the ticks. ... : 1000.0 1000.5 1001.0 1001.5 1002.0 Question&Answers:os...

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

0 votes

399 views

1 answer

c - Why dividing two integers doesn't get a float?

This question already has answers here: Question&Answers:os...

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

0 votes

296 views

1 answer

objective c - Cannot add items to an NSMutableArray ivar

My goal is to add a string to array, and I do that in a method which I call. In this method, I get ... even though I have read the documents a number of times. Question&Answers:os...

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

0 votes

218 views

1 answer

language agnostic - What are sessions? How do they work?

I am just beginning to start learning web application development, using python. I am coming across the terms ' ... am getting quite confused here. Need help. Question&Answers:os...

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

0 votes

68 views

1 answer

What is the { get; set; } syntax in C#?

I am learning ASP.NET MVC and I can read English documents, but I don't really understand what is happening in this ... What does this mean: { get; set; }? Question&Answers:os...

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

0 votes

159 views

1 answer

css - Add Bootstrap Glyphicon to Input Box

How can I add a glyphicon to a text type input box? For example I want to have 'icon-user' in a username input, something like this: Question&Answers:os...

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

0 votes

244 views

1 answer

Abstraction VS Information Hiding VS Encapsulation

Can you tell me what is the difference between abstraction and information hiding in software development? I ... below for several citations taken from there. Question&Answers:os...

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

0 votes

1.6k views

1 answer

logging - How should I log while using multiprocessing in Python?

Right now I have a central module in a framework that spawns multiple processes using the Python 2.6 ... there alternatives I'm not thinking of? Question&Answers:os...

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

0 votes

185 views

1 answer

c++ - Compiling C++11 with g++

I'm trying to update my C++ compiler to C++11. I have searched a bit and I have come to the conclusion that I ... -std=c++0x or -std=gnu++0x compiler options. Question&Answers:os...

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

0 votes

339 views

1 answer

ruby - Rails :include vs. :joins

This is more of a "why do things work this way" question rather than a "I don't know how to do ... performance issue and doesn't join except in certain cases? Question&Answers:os...

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

0 votes

419 views

1 answer

c# - Using async/await for multiple tasks

I'm using an API client that is completely asynchrounous, that is, each operation either returns Task or Task< ... writing to the console as each one completes. Question&Answers:os...

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

0 votes

198 views

1 answer

python - Breaking out of nested loops

This question already has answers here: Question&Answers:os...

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

0 votes

249 views

1 answer

How can I display a list view in an Android Alert Dialog?

In an Android application, I want to display a custom list view in an AlertDialog. How can I do this? Question&Answers:os...

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

0 votes

215 views

1 answer

javascript - Returning Chrome storage API value without function

For the past two days I have been working with chrome asynchronous storage. It works "fine" if you have a function. ... }); //I need it outside this function. Question&Answers:os...

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

0 votes

377 views

1 answer

mysql - Using PHP 5.5's password_hash and password_verify function

Say I wanted to store a password for a user, would this be the right way to do it with PHP 5.5's ... ; if (password_verify($password, $hash) { // Verified } Question&Answers:os...

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

0 votes

84 views

1 answer

How to pass a value from one Activity to another in Android?

I have created an Activity with a AutuCompleteTextView[ACTV] and button. I enter some text in the ACTV then press the ... the button by using "onClick(View v)" Question&Answers:os...

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

0 votes

494 views

1 answer

reactjs - React setState not Updating Immediately

I'm working on a todo application. This is a very simplified version of the offending code. I have a ... another function to force the state to update? Question&Answers:os...

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

Categories

Recent questions

Just Browsing Browsing

Most popular tags