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django - How to remove all relations from manytomany?

In one model, I have this: class MyModel(models.Model): relations = models.ManyToManyField(OtherModel) .... and if ... .clean() is not working. See Question&Answers more detail:os...

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How do I set permissions (attributes) on a file in a ZIP file using Python's zipfile module?

When I extract files from a ZIP file created with the Python zipfile module, all the files are not writable, ... find, can anyone enlighten me? See Question&Answers more detail:os...

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performance - Is there a 128 bit integer in C++?

I need to store a 128 bits long UUID in a variable. Is there a 128-bit datatype in C++? I do not need ... from C++11 would be fine, too. See Question&Answers more detail:os...

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

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XAMPP apache server is not starting after Skype installation

I am getting following console logs: 1:14:33 PM [apache] Possible problem detected! 1:14:33 PM [apache] Port ... log generated for today's date. See Question&Answers more detail:os...

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

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x86 - Addressing Modes in Assembly Language (IA-32 NASM)

As the web-resources on this is sparse, I will, for the benefit of future searches, begin by listing the address ... the end, not MY_TABLE[1]? See Question&Answers more detail:os...

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media player - android mediaRecorder.setAudioSource failed

I have android G1 firmware 1.6, I am trying to record voice from the app with the follow code. MediaRecorder ... how do I record voice properly? See Question&Answers more detail:os...

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How to calculate size of dataframe in spark scala

I want to write one large sized dataframe with repartition so i want to calculate number of repartition for my ... scala Thanks in Advance. See Question&Answers more detail:os...

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c++ - Is there a portable equivalent to DebugBreak()/__debugbreak?

In MSVC, DebugBreak() or __debugbreak cause a debugger to break. On x86 it is equivalent to writing "_asm int ... or something into the code. See Question&Answers more detail:os...

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iphone - How do I use UIPageControl to create multiple views?

I need to use UIPagecontrol for my application, and I'm not sure how to get started. I'm a beginner, and ... different views for each of them. See Question&Answers more detail:os...

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

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ios - Segue in SKScene to UIViewController

In my GameScene.swift file, I am trying to perform a segue back to my Menu View Controller like so: func ... and it was indeed "menu". See Question&Answers more detail:os...

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

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opengl - Wrap an image around a cylindrical object in HTML5 / JavaScript

I want to wrap an image around a cylindrical object like mugs in a web app, like so This will likely be ... provide an answer to this question. See Question&Answers more detail:os...

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c - How to obtain the correct physical size of the monitor?

How can I get the size of the display in centimeters or inches? This code does not always works correctly: ... have a constant physical size. See Question&Answers more detail:os...

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Implementing the singleton pattern in Java

Can anyone provide an example of a singleton pattern and explain why they are necessary? See Question&Answers more detail:os...

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

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Django ModelForm override widget

Disclaimer: I am a beginner with python and Django but have Drupal programming experience. How can I override ... to exclude ModelForm. 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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java - Android getIntent().getExtras() returns null

I'm trying to pass a string between two activities. I've done this in other projects using the same method, but ... this way. What am I missing? See Question&Answers more detail:os...

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

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arrays - How can a slice contain itself?

I'm trying to learn Golang using "The Go Programming Language" and I've reached the section on slices. They ... to the elements being indirect? 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 mobile browser detection?

I'm in need of a way to detect mobile browsers server-side. I'd like a way that requires me to do little to ... market if it doesn't take much. See Question&Answers more detail:os...

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.htaccess - htaccess subdomain

Howto make this with htacess: subdomain.domain.com -> domain.com/subdomain (no redirect on client side) domain.com/ ... $ index.php/$1 [QSA] 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 - Error setting a default null value for an annotation's field

Why am I getting an error "Attribute value must be constant". Isn't null constant??? @Target(ElementType.TYPE) ... // this doesn't compile } See Question&Answers more detail:os...

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

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What do dot and hash symbols mean in JQuery?

I feel confused of the dot and hash symbols in the following example: <DIV ID="row"> <DIV ID="c1"> <Input ... DIV instead of using "#row div" ? 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 - String.split() *not* on regular expression?

Since String.split() works with regular expressions, this snippet: String s = "str?str?argh"; s. ... writing an escapeGenericRegex() function. 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 - How to properly add hex escapes into a string-literal?

When you have string in C, you can add direct hex code inside. char str[] = "abcde"; // 'a', 'b', ' ... it is larger than ASCII table can hold. See Question&Answers more detail:os...

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string - How to get the day of the week from the day number in JavaScript?

Given dayNumber is from 0 - 6 representing Monday - Sunday respectively. Can the Date / String objects be used ... of the week from dayNumber? See Question&Answers more detail:os...

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sql - How to get a list of months between two dates in mysql

I hve to get the list of months between two dates in mysql. For Example:My Input is From date 23-01-2013 To ... Feb 2014, Mar 2014, Apr 2014. See Question&Answers more detail:os...

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javascript - How to test if an object is a Proxy?

I would like to test if a JavaScript object is a Proxy. The trivial approach if (obj instanceof Proxy) ... ... an arbitrary object is a Proxy? 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 ping IP addresses using JavaScript

I want to run a JavaScript code to ping 4 different IP addresses and then retrieve the packet loss and latency of these ... . How do I do 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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Dynamic Keyword Arguments in Python?

Does python have the ability to create dynamic keywords? For example: qset.filter(min_price__usd__range=(min_price, ... a selected currency. 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# - MVVM Light RelayCommand Parameters

I'm having an issue with passing a parameter to a relaycommand using the GalaSoft MVVM Light framework. I know ... Action' What am I missing? See Question&Answers more detail:os...

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

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