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How can you create a non-empty CharField in Django?

I have a simple model which looks like this: class Group(models.Model): name = models.CharField(max_length = 100, ... /6940499/how-can-you-create-a-non-empty-charfield-in-django...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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381 views

1 answer

github - Git pushing to a private repo

I have been working on my local on a web app and I was ask to push it to an empty(only read me file ... :https://stackoverflow.com/questions/18842120/git-pushing-to-a-private-repo...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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415 views

1 answer

c# - TimeSpan to ISO8601 duration format string

Can anyone advise on how to convert a timespan or int to an ISO8601 duration string as explained in ... .com/questions/2906022/timespan-to-iso8601-duration-format-string...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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180 views

1 answer

python - How to extract phrases from corpus using gensim

For preprocessing the corpus I was planing to extarct common phrases from the corpus, for this I tried using ... questions/35716121/how-to-extract-phrases-from-corpus-using-gensim...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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427 views

1 answer

eclipse - How to clear .m2 Maven folder?

My computer runs Windows 10 and I work with Java and Eclipse. Recently Windows warned me that I'm running ... //stackoverflow.com/questions/32991258/how-to-clear-m2-maven-folder...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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199 views

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html - Check if parent element contains certain child element using jQuery

<div id="example"> <div id="test"></div> </div> <div id="another">Blah</div> I want to ... com/questions/9833853/check-if-parent-element-contains-certain-child-element-using-jquery...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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285 views

1 answer

c# - Can't add keyValuePair directly to Dictionary

I wanted to add a KeyValuePair<T,U> to a Dictionary<T, U> and I couldn't. I have to pass ... ://stackoverflow.com/questions/13012260/cant-add-keyvaluepair-directly-to-dictionary...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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192 views

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php - displaying a Drupal view without a page template around it

I would like to display a Drupal view without the page template that normally surrounds it - I want just the ... 247991/displaying-a-drupal-view-without-a-page-template-around-it...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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314 views

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android - Access ordered images and video in same Cursor

I'm using the android.content.CursorLoader class to create two Cursor objects to access media stored on the ... questions/17664826/access-ordered-images-and-video-in-same-cursor...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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178 views

1 answer

What are some reasons for jquery .focus() not working?

Some thoughts are that the ELEMENT_ID.focus() is inside divs that are hidden at certain times. This should be ... /9596419/what-are-some-reasons-for-jquery-focus-not-working...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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182 views

1 answer

android - Error:Execution failed for task ':app:kaptDebugKotlin'

I'm new to using Kotlin and trying to set it up with Dagger2, I've seen some few ... ://stackoverflow.com/questions/46850060/errorexecution-failed-for-task-appkaptdebugkotlin...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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321 views

1 answer

c++ - How can I use #pragma message() so that the message points to the file(lineno)?

In order to add 'todo' items into my code, I want to put a message in the compiler output. I would like it ... can-i-use-pragma-message-so-that-the-message-points-to-the-filelineno...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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500 views

1 answer

jquery, set focus on the first enabled input or select or textarea on the page

It's fairly straightforward. I want to set focus to the first enabled and not hidden control on the page. For a ... on-the-first-enabled-input-or-select-or-textarea-on-the-page...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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305 views

1 answer

python - How to count unique ID after groupBy in pyspark

I'm using the following code to agregate students per year. The purpose is to know the total number of ... questions/46421677/how-to-count-unique-id-after-groupby-in-pyspark...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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252 views

1 answer

Amazon ec2 not working when accessing through public IP

(Closed.) This question does not meet Stack Overflow guidelines. It is not currently accepting answers. question ... /amazon-ec2-not-working-when-accessing-through-public-ip...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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283 views

1 answer

postgresql - Does adding a null column to a postgres table cause a lock?

I think I read somewhere that running an ALTER TABLE foo ADD COLUMN baz text on a postgres database will not cause a ... does-adding-a-null-column-to-a-postgres-table-cause-a-lock...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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217 views

1 answer

javascript - React.js - default prop is not used with `null` is passed

I have default props in my React component: PropertyTitleLabel.defaultProps = { bedrooms: 1, propertyType: 'flat' }; ... react-js-default-prop-is-not-used-with-null-is-passed...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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315 views

1 answer

cmd - How to run a command in the background on Windows?

In linux you can use command & to run command on the background, the same will continue after the shell is offline. ... /21031171/how-to-run-a-command-in-the-background-on-windows...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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376 views

1 answer

dart - Add border to a Container with borderRadius in Flutter

Container( child: Text( 'This is a Container', textScaleFactor: 2, style: TextStyle(color: Colors.black), ) ... /58350235/add-border-to-a-container-with-borderradius-in-flutter...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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218 views

1 answer

Alert boxes in Python?

Is it possible to produce an alert similar to JavaScript's alert("message") in python, with an application ... :https://stackoverflow.com/questions/177287/alert-boxes-in-python...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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214 views

1 answer

c# - microsoft.visualbasic.fileio does not exist

I am on .NET Framework 4.0, building a C# web application in VisualStudio 2012. I have ... stackoverflow.com/questions/12830017/microsoft-visualbasic-fileio-does-not-exist...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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285 views

1 answer

http - JAVA -tomcat- Request header is too large

INFO: Error parsing HTTP request header Note: further occurrences of HTTP header parsing errors will be logged at ... com/questions/39720422/java-tomcat-request-header-is-too-large...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.9k views

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get - Servlet and path parameters like /xyz/{value}/test, how to map in web.xml?

Does servlet support urls as follows: /xyz/{value}/test where value could be replaced by text or number. How to map ... -path-parameters-like-xyz-value-test-how-to-map-in-web-xml...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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158 views

1 answer

php - Cast the current object ($this) to a descendent class

I have a class where it may be necessary to change the object to a descendent class further down the line. ... questions/4080217/cast-the-current-object-this-to-a-descendent-class...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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132 views

1 answer

PHP XML Extension: Not installed

So i'm currently installing mybb and went through a very long tutorial on how to do it. The problem ... ://stackoverflow.com/questions/38793676/php-xml-extension-not-installed...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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175 views

1 answer

How to preview Android ListView with custom row and header layout

I have created a list view with a custom layout for the header and rows items many times but what always ... how-to-preview-android-listview-with-custom-row-and-header-layout...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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122 views

1 answer

javascript - How to get Mocha to fail a test

I have the following test: it.only('validation should fail', function(done) { var body = { title: " ... .com/questions/30874676/how-to-get-mocha-to-fail-a-test...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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503 views

1 answer

cloud9 - Upgraded Rails to 6, getting Blocked host Error

I needed the new function in ActiveStorage to resize_to_fill so I upgraded to Ruby 2.5.1 and Rails 6. ruby ... com/questions/53878453/upgraded-rails-to-6-getting-blocked-host-error...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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