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collections - Easiest way to convert a List to a Set in Java

What is the easiest way to convert a List to a Set in Java? Question&Answers:os...

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macos - dyld: Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib

I installed vapor via homebrew and then immediately wanted to jump into a project by executing vapor new Hello but ... I'm on MacOS Catalina if that matters. Question&Answers:os...

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

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How to test if string exists in file with Bash?

I have a file that contains directory names: my_list.txt : /tmp /var/tmp I'd like to check in Bash before ... name if that name already exists in the file. Question&Answers:os...

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

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r - Easy way to convert long to wide format with counts

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

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html - Elongated hexagon shaped button using only one element

I would like to make a button like these one just with CSS without using another element. Button Image Since the ... button ribbon-outset border">Click me!</a> Question&Answers:os...

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

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windows installer - How do I avoid triggering MSI self-repair with my WiX / MSI package?

How do I avoid triggering self-repair from my WiX generated MSI package? This is a Q/A-style question with ... the most common causes of repeating self-repair. Question&Answers:os...

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algorithm - How to get a square root for 32 bit input in one clock cycle only?

I want to design a synthesizable module in Verilog which will take only one cycle in calculating square root of given input of 32 bit. Question&Answers:os...

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

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java - math.random, only generating a 0?

The following code is only producing a 0 ;-; What am I doing wrong? public class RockPaperSci { public static void main ... random() * 4 - 1); Thanks, everyone! Question&Answers:os...

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

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java - How can I scroll more than one object at the same time?

New question was asked after this one, found here. I'm new to Java, but I am working on a recreation of "Flappy ... () { return new Dimension(751, 501); } } Question&Answers:os...

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

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jdbc - java.sql.SQLException: Column count doesn't match value count at row 1

The structure of my table: id int AUTO_INCREMENT PRIMARY KEY title text url text age int Here's how I am trying to ... be in the id column, how to solve it? Question&Answers:os...

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javascript - The .replace() method does change the string in place

I simply try to use the .replace() method. And it does not work. HTML: <div class="try"> </div> JS: var valr='r ... to get 't' Any idea on why it doesn't work? Question&Answers:os...

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What is the best (and safest) way to merge a Git branch into master?

A new branch from master is created, we call it test. There are several developers who either commit to master ... to keep the timeline as linear as possible. Question&Answers:os...

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What are the differences between "git commit" and "git push"?

In a Git tutorial I'm going through, git commit is used to store the changes you've made. What is git push used for then? Question&Answers:os...

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

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How to squash commits in git after they have been pushed?

This gives a good explanation of squashing multiple commits: http://git-scm.com/book/en/Git-Branching-Rebasing but ... a commit message. What am I doing wrong? Question&Answers:os...

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

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objective c - How do you add an in-app purchase to an iOS application?

How do you add an in-app purchase to an iOS app? What are all the details and is there any sample code? This ... for how to add in-app purchases to iOS apps Question&Answers:os...

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

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filenames - C++ code file extension? What is the difference between .cc and .cpp

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

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rake - A cron job for rails: best practices?

What's the best way to run scheduled tasks in a Rails environment? Script/runner? Rake? I would like to run the task every few minutes. Question&Answers:os...

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

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javascript - How do I conditionally add attributes to React components?

Is there a way to only add attributes to a React component if a certain condition is met? I'm supposed to add required and ... "required" : ""} /> ); } }); Question&Answers:os...

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

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Types in Objective-C on iOS

I want to ask about the fundamental data types in Objective-C on iOS. I need the size on which the variable is ... unsigned: 0 to 65535 This is only an example. Question&Answers:os...

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

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python - Shuffle DataFrame rows

I have the following DataFrame: Col1 Col2 Col3 Type 0 1 2 3 1 1 4 5 6 1 ... 20 7 8 9 2 21 10 11 12 2 ... 45 ... 5 6 1 46 16 17 18 3 ... How can I achieve this? Question&Answers:os...

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r - How to delete rows from a dataframe that contain n*NA

I have a number of large datasets with ~10 columns, and ~200000 rows. Not all columns contain values for ... Perhaps the merge function could be altered? Thanks Question&Answers:os...

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

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jqgrid: how to set toolbar options based on column value in row selected

I have a column field type having values (editable, readonly). all the rows will have one of these values populated. ... row. how can i achieve that in jqgrid. Question&Answers:os...

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

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python - What happens when a module is imported twice?

I have a doubt that I would like to get cleared up. Consider the following module named ex_1.py: print("Hello, I' ... 'm ex_1 once. Shouldn't it print it twice? Question&Answers:os...

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html - Flexbox fill available space vertically

Now in a flexbox row I can write <div layout="row"> <div>some content</div> <div flex></div> <!-- fills ... and bottom: 0; but can I achieve this with flexbox? Question&Answers:os...

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python - AttributeError: can't set attribute when connecting to sqlite database with flask-sqlalchemy

I've been learning the flask web application framework and feel quite comfortable with it. I've previously built a ... ): return User.query.get(int(user_id)) Question&Answers:os...

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

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python - df.append() is not appending to the DataFrame

I formulated this question about adding rows WITH index, but it is not yet clear to me how/why this happens ... number is higher than the rows of the database) Question&Answers:os...

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

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javascript - Applying className/onClick/onChange not working on Custom React Component

I'm almost new to react. I'm trying to create a simple editing and creating mask. Here is the code: import React, { ... (this)} className="Company"/> }) } </ul> Question&Answers:os...

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

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c++ - Non-blocking worker - interrupt file copy

I'm dealing with very large files, in excess of hundreds of GB in size. The User needs to be able to move ... together my own class to handle copy and rename? Question&Answers:os...

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

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