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javascript - Prevent form submission on Enter key press

I have a form with two text boxes, one select drop down and one radio button. When the enter key is ... from being submitted when the enter key is pressed? Question&Answers:os...

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

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java - What is the difference between a static method and a non-static method?

See the code snippets below: Code 1 public class A { static int add(int i, int j) { return(i + j); ... between these code snippets? Both output 15 as an answer. Question&Answers:os...

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

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355 views

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java - Maven Shade JavaFX runtime components are missing

I'm trying to create a JFX11 self-containing jar using maven dependencies. From the research I've done, it seems the ... /plugin> </plugins> </build> </project> Question&Answers:os...

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

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python - How to read a file in reverse order?

How to read a file in reverse order using python? I want to read a file from last line to first line. Question&Answers:os...

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

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182 views

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javascript - AJAX cross domain call

I know about AJAX cross-domain policy. So I can't just call "http://www.google.com" over a ajax HTTP ... from a foreign domain? iFrames follow the same policy? Question&Answers:os...

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

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439 views

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installation - Extract MSI from EXE

I want to extract the MSI of an EXE setup to publish over a network. For example, using Universal Extractor, but it doesn't work for Java Runtime Environment. Question&Answers:os...

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

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255 views

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Populating cascading dropdown lists in JSP/Servlet

Suppose I am having three dropdownlist controls named dd1, dd2 and dd3. The value of each dropdownlist comes from ... how do I call servlet for this problem? Question&Answers:os...

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

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java - What is the difference between JDK and JRE?

What is the difference between JDK and JRE? What are their roles and when should I use one or the other? Question&Answers:os...

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

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sql - How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?

Can anyone explain how to implement one-to-one, one-to-many and many-to-many relationships while designing tables with some examples? Question&Answers:os...

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

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optimization - What do the terms "CPU bound" and "I/O bound" mean?

What do the terms "CPU bound" and "I/O bound" mean? Question&Answers:os...

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

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90 views

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c++ - Which kind of pointer do I use when?

Ok, so the last time I wrote C++ for a living, std::auto_ptr was all the std lib had available, and ... smart pointers. (Something like this would be great). Question&Answers:os...

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

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201 views

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python - Maximum and Minimum values for ints

I am looking for minimum and maximum values for integers in python. For eg., in Java, we have Integer. ... MAX_VALUE. Is there something like this in python? Question&Answers:os...

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

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ssl - Java: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

I have a class that will download a file from a https server. When I run it, it returns ... .SSLHandshakeException: General SSLEngine problem Shutting down Done Question&Answers:os...

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

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How do you run multiple programs in parallel from a bash script?

I am trying to write a .sh file that runs many programs simultaneously I tried this prog1 prog2 But that runs prog1 ... .. So how can I run them in parallel? Question&Answers:os...

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

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197 views

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Simplest way to read JSON from a URL in Java

This might be a dumb question but what is the simplest way to read and parse JSON from URL in Java? In Groovy, it ... to do is to read the content of this link. Question&Answers:os...

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

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364 views

1 answer

android - How to use RecyclerView inside NestedScrollView?

How to use RecyclerView inside NestedScrollView? RecyclerView content is not visible after setting adapter. ... /android.support.v4.widget.NestedScrollView> Question&Answers:os...

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

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79 views

1 answer

javascript - Is it not possible to stringify an Error using JSON.stringify?

Reproducing the problem I'm running into an issue when trying to pass error messages around using web sockets ... answer provides a workaround for this problem. Question&Answers:os...

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

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229 views

1 answer

Trust Anchor not found for Android SSL Connection

I am trying to connect to an IIS6 box running a godaddy 256bit SSL cert, and I am getting the error ... ); String tempString = toString(conn.getInputStream()); Question&Answers:os...

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

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165 views

1 answer

Creating default object from empty value in PHP?

I see this error only after upgrading my PHP environment to PHP 5.4 and beyond. The error points to this line of ... Do I first need to declare my $res object? Question&Answers:os...

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

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291 views

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javascript - Why is typeof null "object"?

I'm reading 'Professional Javascript for Web Developers' Chapter 4 and it tells me that the five types of ... reference), hence making it NOT a primitive? Question&Answers:os...

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

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174 views

1 answer

.net - Capture console exit C#

I have a console application that contains quite a lot of threads. There are threads that monitor ... lines of: MyConsoleProgram.OnExit += CleanupBeforeExit; Question&Answers:os...

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

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375 views

1 answer

css - What are the default margins for the html heading tags (<h1>, <h2>, <h3>, etc.)?

I avoid using the defaults with the reset code below: margin:0px; and padding:0px; For example, what are the default ... the heading tag below? <h1>Header</h1> Question&Answers:os...

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

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543 views

1 answer

pom.xml - Differences between dependencyManagement and dependencies in Maven

What is the difference between dependencyManagement and dependencies? I have seen the docs at Apache Maven web site ... define it directly in the needed module? Question&Answers:os...

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

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157 views

1 answer

Function overloading in Javascript - Best practices

What is the best way(s) to fake function overloading in Javascript? I know it is not possible to overload ... of arguments Checking types of arguments Or how? Question&Answers:os...

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

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247 views

1 answer

r - Convert data.frame columns from factors to characters

I have a data frame. Let's call him bob: > head(bob) phenotype exclusion GSM399350 3- 4- 8- 25- ... column? Bonus question: why does the manual approach work? Question&Answers:os...

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

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85 views

1 answer

How to trigger a file download when clicking an HTML button or JavaScript

This is crazy but I don't know how to do this, and because of how common the words are, it's hard to ... end scripts, or mess with server headers or mime types. Question&Answers:os...

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

0 votes

196 views

1 answer

python - Why should we NOT use sys.setdefaultencoding("utf-8") in a py script?

I have seen few py scripts which use this at the top of the script. In what cases one should use it? import sys reload(sys) sys.setdefaultencoding("utf-8") Question&Answers:os...

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

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165 views

1 answer

javascript - For loop for HTMLCollection elements

I'm trying to set get id of all elements in an HTMLCollectionOf. I wrote the following code: var list = ... undefined but the first console output is event1? Question&Answers:os...

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

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