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ios - How do I fix the xcrun unable to find simctl error?

I have Xcode 6.2 Beta. Attempting xcrun simctl in terminal yields xcrun: error: unable to find utility "simctl", not a developer tool or in PATH See Question&Answers more detail:os...

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

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576 views

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reactjs - How to use switch statement inside a React component?

I have a React component, and inside the render method of the component I have something like this: render() { ... how to achieve what I want? See Question&Answers more detail:os...

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

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675 views

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What is a dangling commit and a blob in a Git repository and where do they come from?

I'm looking for the basic information on dangling commits and blobs. My repository seems fine. But I ran git ... the state of my repository? See Question&Answers more detail:os...

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

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asp.net mvc - How to specify an area name in an action link?

I have a shared master page which I am using from 2 different areas in my mvc 2 app. The master page has ... parameter, is it possible to do? See Question&Answers more detail:os...

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

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Sources for Android API 23 Platform not found (Android Studio 2.0)

Android Studio doesn't redirect me to API sources correctly. When I hit any function it ... :prepareDebugUnitTestDependencies BUILD SUCCESSFUL 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 - Pass extra arguments to Serializer Class in Django Rest Framework

I want to pass some arguments to DRF Serializer class from Viewset, so for I have tried this: class ... or suggest me better options. 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 - When to close MongoDB database connection in Nodejs

Working with Nodejs and MongoDB through Node MongoDB native driver. Need to retrieve some documents, and make ... connection needs to open? See Question&Answers more detail:os...

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

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376 views

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Scala multiple type pattern matching

I'm wondering how can I use multiple type pattern matching. I have: abstract class MyAbstract case class MyFirst ... )). Thanks in advance! 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 - Smooth scroll anchor links WITHOUT jQuery

Is it possible to use smooth scroll to anchor links but without jQuery? I am creating a new site and I don't want to use jQuery. 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 loading progress of an image

Is there a way in JS to get the progress of a loading image while the image is being loaded? I want to use ... }; someImage.src = "image.jpg"; See Question&Answers more detail:os...

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

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hadoop - Spark on yarn concept understanding

I am trying to understand how spark runs on YARN cluster/client. I have the following question in my mind. Is ... is sending the job to cluster? 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# - Best practices for serializing objects to a custom string format for use in an output file

I was just about to implement an override of ToString() on a particular business class in order to produce an ... string out of an object? See Question&Answers more detail:os...

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

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397 views

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objective c - Access iOS dictionary programmatically

I'm looking for a way to access iOS dictionary programmatically. What I need is to retrieve the list of the ... me to the right direction? 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 use subprocesses to force python to release memory?

I was reading up on Python Memory Management and would like to reduce the memory footprint of my application. ... python c-extensions 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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MySQL compare DATE string with string from DATETIME field

I have a question: Is it possible to select from a MySQL database by comparing one DATE string "2010-04-29" ... :00". Any suggestions? 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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429 views

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r - ggplot2 plot area margins?

Is there an easy way to increase the space between the plot title and the plot area below it (the box with the ... x axis title a bit down"? See Question&Answers more detail:os...

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

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711 views

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Compile R script into standalone .exe file?

Is there any easy way to compile my R script into standalone .exe file just like what matlab does? 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 - Module function vs staticmethod vs classmethod vs no decorators: Which idiom is more pythonic?

I'm a Java developer who's toyed around with Python on and off. I recently stumbled upon this article which ... a non-issue? Please help! See Question&Answers more detail:os...

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

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843 views

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c# - How can I align text in columns using Console.WriteLine?

I have a sort of column display, but the end two column's seem to not be aligning correctly. This is ... advice it would be greatly appreciated! See Question&Answers more detail:os...

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

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text to speech - How to make Python speak

How could I make Python say some text? I could use Festival with subprocess but I won't be able to control it ( ... for Festival, eSpeak, ... ? See Question&Answers more detail:os...

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

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node-gyp build error windows x64

Here's what I've done so far on my x64 OS: Installed Python (v2.7 --specifically 2.7.6) and added it ... my node-sqlserver MS driver for Node.js 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 - AsyncTask: where does the return value of doInBackground() go?

When calling AsyncTask<Integer,Integer,Boolean>, where is the return value of: protected Boolean doInBackground(Integer. ... () be found? 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 - Programmatically collapse a group in ExpandableListView

When I expand a new group, can I collapse the last one expanded? See Question&Answers more detail:os...

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

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261 views

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How to read a config file using python

I have a config file abc.txt which looks somewhat like: path1 = "D:est1first" path2 = "D:est2second" path3 ... my program to avoid hard coding. 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 - Best practice to get EntityManagerFactory

What is the best approach to get EntityManagerFactory in web app(jsp/servlets)? Is this a good way When should ... from JNDI, or something else? See Question&Answers more detail:os...

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

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647 views

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Get the current file name in gulp.src()

In my gulp.js file I'm streaming all HTML files from the examples folder into the build folder. To create the ... can't find the right plugin. See Question&Answers more detail:os...

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

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991 views

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typescript - Angular Material: mat-select not selecting default

I have a mat-select where the options are all objects defined in an array. I am trying to set the value to ... material version 2.0.0-beta.10 See Question&Answers more detail:os...

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

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297 views

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javascript - Why is useState not triggering re-render?

I've initialized a state that is an array, and when I update it my component does not re-render. Here ... CodeSandbox with the proof of concept. See Question&Answers more detail:os...

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

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