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Does IE8 not support the following CSS media query: @import url("desktop.css") screen and (min-width: 768px); If ... css") only screen and (device-width:768px); Question&Answers:os...

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

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scala - Spark - load CSV file as DataFrame?

I would like to read a CSV in spark and convert it as DataFrame and store it in HDFS with df.registerTempTable ... load CSV file as DataFrame in Apache Spark? Question&Answers:os...

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

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sql server - SQL JOIN vs IN performance?

I have a case where using a JOIN or an IN will give me the correct results... Which typically has better ... you are running? (FYI I am using MSSQL) Question&Answers:os...

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

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algorithm - How to convert floats to human-readable fractions?

Let's say we have 0.33, we need to output 1/3. If we have 0.4, we need to output 2/5. The idea is to ... I was wondering if there was a simple way to do this? Question&Answers:os...

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

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Android webview launches browser when calling loadurl

I created an Activity that has a title and a web view in a LinearLayout. In the onResume() method it calls ... here. Just implement the web client and set it. Question&Answers:os...

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

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How to disable an Android button?

I have created a layout that contains two buttons, Next and Previous. In between the buttons I'm generating some ... . Is there anyway to disable the buttons? Question&Answers:os...

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

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html - How to submit form on change of dropdown list?

I am creating a page in JSP where I have a dropdown list and once the user selects a value he has to click ... to do it without having to click the go button. Question&Answers:os...

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

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escaping - How to escape a JSON string containing newline characters using JavaScript?

I have to form a JSON string in which a value is having new line character. This has to be escaped and ... the string with JavaScript. I am not using jQuery. Question&Answers:os...

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

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java - How to execute IN() SQL queries with Spring's JDBCTemplate effectively?

I was wondering if there is a more elegant way to do IN() queries with Spring's JDBCTemplate ... like the parameter substitution of prepared statements Question&Answers:os...

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

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How to monitor SQL Server table changes by using c#?

I have more than one application accessing the same DB and I need to get notified if one of these apps change ... Database and apps are not in the same server. Question&Answers:os...

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

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ios - Uploading file with parameters using Alamofire

I am attempting to upload a file using Alamofire. The upload works fine when using a File (NSUrl), ... to send additional parameters along with the upload. Question&Answers:os...

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

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How to get JavaScript caller function line number? How to get JavaScript caller source URL?

I am using the following for getting the JavaScript caller function name: var callerFunc = arguments.callee.caller. ... was called from? Or the source URL? Question&Answers:os...

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

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algorithm - Sparse matrices / arrays in Java

I'm working on a project, written in Java, which requires that I build a very large 2-D sparse array. Very ... , but haven't heard any opinions on its quality. Question&Answers:os...

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

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Pure JavaScript: a function like jQuery's isNumeric()

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

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javascript - Google Maps v3 - limit viewable area and zoom level

is it possible to limit Google map v3 to a certain area? I want to allow displaying only some area (e.g. ... on other basic types this way. Thanks for any help Question&Answers:os...

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

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php - Selecting a css class with xpath

I want to select just a class on its own called .date For some reason, I cannot get this to work. If anyone knows ... ($images as $img) { echo $img." "; } Question&Answers:os...

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

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string - Upper vs Lower Case

When doing case-insensitive comparisons, is it more efficient to convert the string to upper case or lower case? ... clearly better than the other, and why? Question&Answers:os...

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

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962 views

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plot - Combine base and ggplot graphics in R figure window

I would like to generate a figure that has a combination of base and ggplot graphics. The following code shows my ... one of the plots are generated in ggplot? Question&Answers:os...

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

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179 views

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Conveniently Declaring Compile-Time Strings in C++

Being able to create and manipulate strings during compile-time in C++ has several useful applications. Although it ... interest) to implement such a macro =) Question&Answers:os...

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

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990 views

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local storage - Is it safe to store a JWT in localStorage with ReactJS?

I'm currently building a single page application using ReactJS. I read that one of the reasons for not using ... would it now be safe to use localStorage? Question&Answers:os...

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

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Getting list of parameter names inside python function

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

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c++ - Type erasure techniques

(With type erasure, I mean hiding some or all of the type information regarding a class, somewhat like Boost.Any.) I want ... << std::endl; std::cin.get(); } Question&Answers:os...

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

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c# - How to read AppSettings values from a .json file in ASP.NET Core

I have set up my AppSettings data in file appsettings/Config .json like this: { "AppSettings": { "token": "1234" } } ... ; But how do I do this in ASP.NET Core? Question&Answers:os...

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

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.net - How to create a simple proxy in C#?

I have downloaded Privoxy few weeks ago and for the fun I was curious to know how a simple version of it can ... a Git Hub Repository with a Simple Http Proxy. Question&Answers:os...

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

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232 views

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audio - How do I make JavaScript beep?

I want my web page to beep whenever a user exceeds the maximum character limit of my <textarea>. Question&Answers:os...

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

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162 views

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c - What is the purpose of static keyword in array parameter of function like "char s[static 10]"?

While browsing some source code I came across a function like this: void someFunction(char someArray[static 100 ... Why is it different for function parameters? 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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python - How to compare two dates?

How would I compare two dates to see which is later, using Python? For example, I want to check if the ... telling the admin to update the holiday.txt file. Question&Answers:os...

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

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278 views

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SQL Server - Return value after INSERT

I'm trying to get a the key-value back after an INSERT-statement. Example: I've got a table with the ... this done? We're using Microsoft SQL Server 2008. Question&Answers:os...

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

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