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javascript - window.onload vs <body onload=""/>

What exactly is the difference between the window.onload event and the onload event of the body tag? when do I use which and how should it be done correctly? Question&Answers:os...

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

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210 views

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Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

I am getting the following error when I try to connect to mysql: Can't connect to local MySQL server through ... error? What might be the reason behind it? Question&Answers:os...

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

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java - Why can't overriding methods throw exceptions broader than the overridden method?

I was going through SCJP 6 book by Kathe sierra and came across this explanations of throwing exceptions in ... unless it's a subclass of FileNotFoundException. Question&Answers:os...

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

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parameters - AngularJS ui router passing data between states without URL

I am facing this problem of passing data between two states without exposing the data in the url, it's like ... data between states, without using url params ? Question&Answers:os...

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

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211 views

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sql - Concatenate columns in Apache Spark DataFrame

How do we concatenate two columns in an Apache Spark DataFrame? Is there any function in Spark SQL which we can use? Question&Answers:os...

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

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httpurlconnection - Connecting to remote URL which requires authentication using Java

How do I connect to a remote URL in Java which requires authentication. I'm trying to find ... connection = (HttpURLConnection)url.openConnection(); Question&Answers:os...

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

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c# - How to connect to MySQL Database?

New to C# programming, I'd like to be able to access MySQL Databases. I know MySQL connector/NET and ... connector? Is there anything else they would need? Question&Answers:os...

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

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r - How do I save warnings and errors as output from a function?

I'm using lapply to run a complex function on a large number of items, and I'd like to save the output from ... thing in the list? for the most relevant ones. Question&Answers:os...

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

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java - Are static fields open for garbage collection?

Given an hypothetical utility class that is used only in program setup: class MyUtils { private static MyObject ... around for the life of the program? Question&Answers:os...

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

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vba - automatically execute an Excel macro on a cell change

How can I automatically execute an Excel macro each time a value in a particular cell changes? Right now, my working ... of the macro. Is there a better way? Question&Answers:os...

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

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How expensive are exceptions in C#?

How expensive are exceptions in C#? It seems like they are not incredibly expensive as long as the stack ... there definitive report that hasn't been rebutted? Question&Answers:os...

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

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python - How to display a float with two decimal places?

I have a function taking float arguments (generally integers or decimals with one significant digit), and I need to output ... ). How can I do this in Python? Question&Answers:os...

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

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android - java.lang.ClassNotFoundException: Didn't find class on path: dexpathlist

I'm currently working on a project in which I have to use purely native ndk. It worked when I try running an ... doing here? I'll post full code if necassary. Question&Answers:os...

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

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javascript - Pass a parameter to a content script injected using chrome.tabs.executeScript()

How can I pass a parameter to the JavaScript in a content script file which is injected using: chrome.tabs.executeScript(tab.id, {file: "content.js"}); Question&Answers:os...

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

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android - ADB Shell Input Events

What is the basic difference between adb shell input keyevent and adb shell sendevent? Which one should I use for ... same that we pass to both the commands? Question&Answers:os...

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

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How can I get the ID of an element using jQuery?

<div id="test"></div> <script> $(document).ready(function() { alert($('#test').id); }); </script> Why doesn't the above work, and how should I do this? Question&Answers:os...

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

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225 views

1 answer

How do I convert a PDF document to a preview image in PHP?

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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410 views

1 answer

shell - Using cURL to upload POST data with files

I would like to use cURL to not only send data parameters in HTTP POST but to also upload files with specific ... How do I adjust my cURL commands accordingly ? Question&Answers:os...

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

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504 views

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wpf - INotifyPropertyChanged vs. DependencyProperty in ViewModel

When implementing the ViewModel in a Model-View-ViewModel architecture WPF application there seem to be two major ... to consider when make the design decision? Question&Answers:os...

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

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105 views

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How to make custom error pages work in ASP.NET MVC 4

I want a custom error page shown for 500, 404 and 403. Here's what I have done: Enabled custom errors in the ... What do I have to do to handle other errors? Question&Answers:os...

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

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How can I record a video in my Android app?

How can I capture a video recording on Android? Question&Answers:os...

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

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388 views

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angularjs - Adding multiple class using ng-class

Can we have multiple expression to add multiple ng-class ? for eg. <div ng-class="{class1: expressionData1, class2: ... anyone put up the example to do so. . Question&Answers:os...

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

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930 views

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mod rewrite - .htaccess redirect all pages to new domain

Which redirect rule would I use to redirect all pages under olddomain.example to be redirected to newdomain.example? The ... How do I keep the last part out? Question&Answers:os...

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

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159 views

1 answer

What is the shortest function for reading a cookie by name in JavaScript?

What is the shortest, accurate, and cross-browser compatible method for reading a cookie in JavaScript? Very often, ... ensuring the solution I have is valid. Question&Answers:os...

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

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304 views

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html - How to line-break from css, without using <br />?

output: hello How are you code: <p>hello <br> How are you </p> How to achieve same output without <br>? Question&Answers:os...

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

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170 views

1 answer

How do I configure IIS for URL Rewriting an AngularJS application in HTML5 mode?

I have the AngularJS seed project and I've added $locationProvider.html5Mode(true).hashPrefix('!'); to the app.js file. I ... anyone? ...I feel so alone... :-( Question&Answers:os...

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

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320 views

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Is there a difference between foo(void) and foo() in C++ or C?

Consider these two function definitions: void foo() { } void foo(void) { } Is there any difference between ... is the void argument there? Aesthetic reasons? Question&Answers:os...

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

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572 views

1 answer

sql - Error Code: 2013. Lost connection to MySQL server during query

I got the Error Code: 2013. Lost connection to MySQL server during query error when I tried to add an index ... . Is there away to increase the timeout value? Question&Answers:os...

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

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