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python - Return first N key:value pairs from dict

Consider the following dictionary, d: d = {'a': 3, 'b': 2, 'c': 3, 'd': 4, 'e': 5} I want ... . What is the most efficient method of doing this? See Question&Answers more detail:os...

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

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How to provide different Android app icons for different gradle buildTypes?

I have two build types set in my gradle file: debug and release. I'd like to be able to set a different app icon ... ', include: ['*.jar']) } See Question&Answers more detail:os...

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

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javascript - screen styling when virtual keyboard is active

Ideally, i would want the entire interface to have a custom styling that is seen on the ios (itouch / ipad) or android ... +------------+ See Question&Answers more detail:os...

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

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python - Converting an OpenCV Image to Black and White

How do you convert a grayscale OpenCV image to black and white? I see a similar question has already been ... asarray(im_bw_mat)) cv2.waitKey() See Question&Answers more detail:os...

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

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php - Laravel Eloquent get results grouped by days

I currently have a table of page_views that records one row for each time a visitor accesses a page, ... clarification of created_at format. See Question&Answers more detail:os...

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

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image processing - Getting the bounding box of the recognized words using python-tesseract

I am using python-tesseract to extract words from an image. This is a python wrapper for tesseract which is an OCR ... way to get that as well See Question&Answers more detail:os...

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

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android - How to set RecyclerView app:layoutManager="" from XML?

How to set RecyclerView layoutManager from XML? <android.support.v7.widget.RecyclerView app:layoutManager="?? ... layout_height="match_parent"/> See Question&Answers more detail:os...

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

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java - How to set IntelliJ IDEA Project SDK

I just installed IntelliJ IDEA and when I try to create my first Project it asks for me to set up the ... having trouble locating where it is. See Question&Answers more detail:os...

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

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Set a path variable with spaces in the path in a Windows .cmd file or batch file

I'm new to script writing and can't get this one to work. I could if I moved the files to a path without ... can it be done a different way? See Question&Answers more detail:os...

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

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c# - Difference between destructor, dispose and finalize method

I am studying how garbage collector works in c#. I am confused over the use of Destructor, Dispose and Finalize ... links or guides are welcome. See Question&Answers more detail:os...

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

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c++ - Complex C declaration

I was just going through some code on the Internet and found this: float * (*(*foo())[SIZE][ ... rules for reading such complex declarations? See Question&Answers more detail:os...

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javascript - Pass variables to AngularJS controller, best practice?

I am brand new to AngularJS and like what I've seen so far, especially the model / view binding. I'd like to ... do it, what is best practice? See Question&Answers more detail:os...

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

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c - faster alternative to memcpy?

I have a function that is doing memcpy, but it's taking up an enormous amount of cycles. Is there a faster ... to move a piece of memory? See Question&Answers more detail:os...

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

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python - How to run Flask with Gunicorn in multithreaded mode

I have web application written in Flask. As suggested by everyone, I can't use Flask in production. So I ... best way to run this application? See Question&Answers more detail:os...

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

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amazon s3 - Getting started with secure AWS CloudFront streaming with Python

I have created a S3 bucket, uploaded a video, created a streaming distribution in CloudFront. Tested it with a ... sense as the online UI. See Question&Answers more detail:os...

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

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iphone - Font size in pixels

On an iPhone how do I calculate the size of a character in pixels for a given point size? See Question&Answers more detail:os...

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

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2d - Android: looking for a drawArc() method with inner & outer radius

I have the following custom view: This I have achieved by using the Canvas' drawArc() method. However, with this ... still see the red and blue) See Question&Answers more detail:os...

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

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ajax - phonegap: cookie based authentication (PHP) not working [webview]

I'm working on a mobile web-app using sencha touch, HTML5 and phonegap as a wrapper. I'm using PHP- ... normal safari website and the webview? See Question&Answers more detail:os...

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

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visual studio code - Automatically hard wrap lines at column in VSCode

How can I automatically hard wrap lines in VSCode? By that I mean if a line reaches a specified column, ... has ways to control softwrapping. See Question&Answers more detail:os...

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

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How do I make a JAR from a .java file?

I was writing a simple program using a Java application (not application that has projects, but application within a ... a JAR from these files? See Question&Answers more detail:os...

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

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In JavaScript, what is the best way to convert a NodeList to an array?

The DOM method document.querySelectorAll() (and a few others) return a NodeList. To operate on the list, e.g ... the NodeList to an Array? See Question&Answers more detail:os...

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

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c - Literal string initializer for a character array

In the following rules for the case when array decays to pointer: An lvalue [see question 2.5] of type array ... "? Some example please. Thanks! See Question&Answers more detail:os...

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

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typescript - Angular no provider for NameService

I've got a problem loading a class into an Angular component. I've been trying to solve it for a long time; ... me spot the issue with my code? See Question&Answers more detail:os...

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

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c# - What is meant by "managed" vs "unmanaged" resources in .NET?

What is meant by the terms managed resource and unmanaged resource in .NET? How do they come into the picture? See Question&Answers more detail:os...

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

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linux - How to use CMAKE_INSTALL_PREFIX

I want to generate Makefile with install target, making installation to /usr instead of default /usr/ ... TARGETS mylibrary DESTINATION lib) See Question&Answers more detail:os...

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

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shell - how to fix the issue "Command /bin/sh failed with exit code 1" in iphone

I used a cocoa static library in my application. When I compile my library I got the following error: Shell Script ... 1 How can I fix this? See Question&Answers more detail:os...

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

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wpf - How to bind Close command to a button

The easiest way is to implement ButtonClick event handler and invoke Window.Close() method, but how doing this through a Command binding? See Question&Answers more detail:os...

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

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How can I compile my Perl script so it can be executed on systems without 'perl' installed?

I have a .pl file and I want to execute that file in any system even though perl is not installed. How can ... be some good examples to do that? See Question&Answers more detail:os...

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

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