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using Unicode 'dingbat-like' glyphs in R graphics, across devices & platforms, especially PDF

Some of you may have seen my blog post on this topic, where I wrote the following code after wanting to ... that would make this work would be welcomed. Question&Answers:os...

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

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open source - Reading CSV files in C#

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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280 views

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html - Hide vertical scrollbar in <select> element

Hello I have select box with multiple choices and I need to hide the vertical scrollbar, is it possible? < ... click functions? What element I should use then? Question&Answers:os...

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

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954 views

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functional programming - Is there a Haskell idiom for updating a nested data structure?

Let's say I have the following data model, for keeping track of the stats of baseball players, teams ... functional programming and Haskell and static typing. Question&Answers:os...

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

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javascript - why does if("string") evaluate "string" as true but if ("string"==true) does not?

Given the following code: if ("string") { console.log('true!'); } //logs "true" to the console if ("string ... inner loop to be evaluated. What's going on here? Question&Answers:os...

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

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524 views

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ios4 - Exit application in iOS 4.0

Before iOS4.0 clicking the home button on iPhone exits the application, and Apple had in their guide that programmatically ... apple? and how can it be done? Question&Answers:os...

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

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c++ - std::cout won't print

Is there any circumstance when std::cout << "hello" doesn't work? I have a c/c++ code, however the std::cout ... but I don't know which one is suitable for me. Question&Answers:os...

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

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http - Why does my web server software disallow PUT and DELETE requests?

I am trying to implement a REST protocol and have realized in trying to debug that my web server is disallowing ... variable "_method" in the POST query string? Question&Answers:os...

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

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html - How to stream audio/video files such as MP3, MP4, AVI, etc using a Servlet

I would like to stream my audio/video files to web using servlet. I made an attempt with the following servlet: ... is this caused and how can I solve it? Question&Answers:os...

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

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How to get the Desktop path in java

I think this will work only on an English language Windows installation: System.getProperty("user.home") + "/ ... I make this work for non English Windows? Question&Answers:os...

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

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297 views

1 answer

javascript - Highlight text inside of a textarea

Is it possible to highlight text inside of a textarea using javascript? Either changing the background of just a ... or making a portion of the text selected? Question&Answers:os...

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

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Oracle: Import CSV file

I've been searching for a while now but can't seem to find answers so here goes... I've got a CSV file ... is this done using SQLPLUS? Thanks for your time! :) Question&Answers:os...

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

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database design - Do nullable columns occupy additional space in PostgreSQL?

I have a table with 7 columns and 5 of them will be null. I will have a null columns on int, text, ... values? I would like to prevent it from indexing nulls. Question&Answers:os...

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

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c# - How do I get all instances of all loaded types that implement a given interface?

We need to get all the instances of objects that implement a given interface - can we do that, and if so how? Question&Answers:os...

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

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java - Using a JFileChooser with Swing GUI classes and listeners

This is my current menu : public class DrawPolygons { public static void main (String[] args) throws ... I added the listener , but nothing . Question&Answers:os...

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

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92 views

1 answer

How to Write text file Java

The following code does not produce a file (I can't see the file anywhere). What is missing? try { //create a ... } catch(Exception e) { e.printStackTrace(); } Question&Answers:os...

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

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689 views

1 answer

java - How to use @Id with String Type in JPA / Hibernate?

I have one entity which contains primary key of type string. This entity model is as follows: @Entity public ... java.lang.String, got class java.lang.Long Question&Answers:os...

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

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319 views

1 answer

c# - OracleCommand SQL Parameters Binding

I have a problem with the binding of the below parameter. The connection works because I had tested it without using ... name, but it still does not fix it. Question&Answers:os...

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

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300 views

1 answer

What does it mean that string and character comparisons in Swift are not locale-sensitive?

I started learning Swift language and I am very curious What does it mean that string and character comparisons in ... stored in Swift like UTF-8 characters? Question&Answers:os...

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

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c# - The type of one of the expressions in the join clause is incorrect in Entity Framework

While trying to execute this query: var query = from dpr in ctx.DPR_MM join q in ctx.QOT on dpr.DPR_QOT_ID ... , p.PAY_DATE } but getting the error above. Question&Answers:os...

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

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569 views

1 answer

python - Comparing boolean and int using isinstance

Can someone give me an explanation why isinstance() returns True in the following case? I expected False, when ... most cases this is considered less pythonic. Question&Answers:os...

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

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439 views

1 answer

Bulk Insert Partially Quoted CSV File in SQL Server

I'm trying to import a correctly quoted CSV file, meaning data is only quoted if it contains a comma, e. ... statement import a correctly quoted CSV file? How? Question&Answers:os...

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

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397 views

1 answer

PHP How do I round down to two decimal places?

I need to round down a decimal in PHP to two decimal places so that: 49.955 becomes... 49.95 I have tried ... answer to this so far. Any help much appreciated. Question&Answers:os...

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

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397 views

1 answer

r - Get "embedded nul(s) found in input" when reading a csv using read.csv()

I was reading in a csv file. Code is: mydata = read.csv("mycsv.csv", header=True, sep=",", quote=""") Get ... this code so that I do not get the above warning? Question&Answers:os...

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

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230 views

1 answer

Converting decimal to binary in R?

What would be the easiest way to convert a number to base 2 (in a string, as for example 5 would be converted to " ... , 00, 00, 00, 00, 00, 00, 00" Question&Answers:os...

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

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6.3k views

1 answer

jsp - How do you store Java objects in HttpSession?

So I am trying to get a servlet to add a Java object to the session of the user, when this servlet is ... .getAttribute("object"); Both ways still return null. Question&Answers:os...

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

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176 views

1 answer

Javascript date to C# via Ajax

I have javascript date object which gives me a date string in this format, "Wed Dec 16 00:00:00 UTC-0400 ... " to a C# DateTime object. DateTime.Parse fails. Question&Answers:os...

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

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269 views

1 answer

Read integers from a text file with C++ ifstream

I want to read graph adjacency information from a text file and store it into a vector. the file has ... has variable number of integers)? Any suggestions? Question&Answers:os...

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

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