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python - Customize argparse help message

I have written the following sample code to demonstrate my issue. import argparse parser = argparse. ... //stackoverflow.com/questions/35847084/customize-argparse-help-message...

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

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293 views

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dart - Flutter - How does it work behind the scenes?

Obviously, flutter is a framework for running apps on iOS and Android using one codebase. But how does it manage ... /questions/43854647/flutter-how-does-it-work-behind-the-scenes...

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

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513 views

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reactjs - Using a forwardRef component with children in TypeScript

Using @types/react 16.8.2 and TypeScript 3.3.1. I lifted this forward refs example straight from ... /questions/54654303/using-a-forwardref-component-with-children-in-typescript...

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

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262 views

1 answer

How to set Redis max memory?

I find the configure in this, it just said the command to use the specify configure: ./redis-server <path>/ ... ://stackoverflow.com/questions/33115325/how-to-set-redis-max-memory...

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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298 views

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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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383 views

1 answer

Git rebase interactive the last n commits

I have made a bunch of unpushed commits in my feature branch and now want to reorder and partly squash ... .com/questions/41464752/git-rebase-interactive-the-last-n-commits...

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

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242 views

1 answer

android - Setting span size of single row in StaggeredGridLayoutManager

I have a staggered grid that has 2 columns. This is working. What I want is at position 0 for ... /questions/33696096/setting-span-size-of-single-row-in-staggeredgridlayoutmanager...

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

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353 views

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Laravel 5 Migration change length of existed column

It not work, I search so many ways, How can I change length of value in laravel 5 public function up ... .com/questions/36469496/laravel-5-migration-change-length-of-existed-column...

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

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294 views

1 answer

How to use a specific tag/version with composer and a private git repository?

I've got some packages host on the Gitlab of my company. I want to request a specific version of these ... -a-specific-tag-version-with-composer-and-a-private-git-repository...

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

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275 views

1 answer

rust - How do I implement a trait I don't own for a type I don't own?

I wanted to implement the Shl trait for Vec, the code is below. This would make things like vec << 4 possible, which would ... -i-implement-a-trait-i-dont-own-for-a-type-i-dont-own...

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

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222 views

1 answer

django - How to pass a variable from settings.py to a view?

I'm getting the project path in my Django app in settings.py using: PROJECT_PATH = os.path.realpath(os.path.dirname( ... 3984648/how-to-pass-a-variable-from-settings-py-to-a-view...

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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464 views

1 answer

Remove spurious small islands of noise in an image - Python OpenCV

I am trying to get rid of background noise from some of my images. This is the unfiltered image. To filter, ... /remove-spurious-small-islands-of-noise-in-an-image-python-opencv...

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

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252 views

1 answer

javascript - Enum as @param type in JSDoc

Is it possible to use an enum for the JSDoc @param type declaration like in the following example? /** * ... ://stackoverflow.com/questions/21702556/enum-as-param-type-in-jsdoc...

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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239 views

1 answer

How to draw a smooth/dithered gradient on a canvas in Android

Several answers mention to use GradientDrawable.setDither(true) to draw smooth gradients in Android. That has no effect ... draw-a-smooth-dithered-gradient-on-a-canvas-in-android...

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

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148 views

1 answer

javascript - At least one required prop in React

I need to make at least one of the props required: MyComponent.propTypes = { data: PropTypes.object, url: ... .com/questions/42284076/at-least-one-required-prop-in-react...

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

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251 views

1 answer

syntax - What does the ** maths operator do in Python?

What does this mean in Python: sock.recvfrom(2**16) I know what sock is, and I get the gist of the ... stackoverflow.com/questions/1683008/what-does-the-maths-operator-do-in-python...

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

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589 views

1 answer

python - Numpy argmax - random tie breaking

In numpy.argmax function, tie breaking between multiple max elements is so that the first element is ... /stackoverflow.com/questions/42071597/numpy-argmax-random-tie-breaking...

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

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175 views

1 answer

c# - Saving many-to-many relationship in Entity Framework Core

For example, I have 3 classes, which I'm using for many-to-many relationship: public class Library { ... /38893873/saving-many-to-many-relationship-in-entity-framework-core...

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

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517 views

1 answer

javascript - Paste content as plain text in summernote editor

I need to copy paste some content in my summernote editor .But when I paste, it takes the style of the ... .com/questions/30993836/paste-content-as-plain-text-in-summernote-editor...

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

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361 views

1 answer

reactjs - Trace: The node type SpreadProperty has been renamed to SpreadElement at Object.isSpreadProperty

I'm launching a react app, and here's my Webpack configuration: 'use strict' const ExtractPlugin = require ... -node-type-spreadproperty-has-been-renamed-to-spreadelement-at-object...

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

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351 views

1 answer

Go - append to slice in struct

I am trying to implement 2 simple structs as follows: package main import ( "fmt" ) type MyBoxItem struct { ... //stackoverflow.com/questions/18042439/go-append-to-slice-in-struct...

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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254 views

1 answer

networking - How do I delete virtual interface in Linux?

(Closed.) This question does not meet Stack Overflow guidelines. It is not currently accepting answers. question ... questions/34326704/how-do-i-delete-virtual-interface-in-linux...

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

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286 views

1 answer

python - Installing numpy on Docker Alpine

I'm trying to install numpy in a docker container based on Alpine 3.1. I'm using the following ... https://stackoverflow.com/questions/33421965/installing-numpy-on-docker-alpine...

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

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206 views

1 answer

html - Fallback background-image if default doesn't exist

I want to set an image as a background, however the image name might be either bg.png or bg. ... .com/questions/37588017/fallback-background-image-if-default-doesnt-exist...

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

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