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I am quite new to HTML5. I try the following HTML5 code to access camera on my mobile phone. It ... question from:https://stackoverflow.com/questions/9431475/html5-camera-access...

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

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How to use regex with optional characters in python?

Say I have a string "3434.35353" and another string "3593" How do I make a single regular expression that ... /questions/9891814/how-to-use-regex-with-optional-characters-in-python...

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

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c - Why fork() before setsid()

Why fork() before setsid() to daemonize a process? Basically, if I want to detach a process from its ... from:https://stackoverflow.com/questions/2613104/why-fork-before-setsid...

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

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python - What is "backlog" in TCP connections?

Below, you see a python program that acts as a server listening for connection requests to port 9999: # ... /stackoverflow.com/questions/36594400/what-is-backlog-in-tcp-connections...

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

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multi window - How can I disable multiwindow mode for an Activity in Android N+

In the developer preview for Android N, multi-window support is enabled by default. How can I disable it for ... can-i-disable-multiwindow-mode-for-an-activity-in-android-n...

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

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javascript - How can I block a React component to be rendered until I fetched all informations?

I need to fetch some informations before rendering my component. The information will be provided by an API and ... -react-component-to-be-rendered-until-i-fetched-all-information...

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

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Vim settings file on Windows

I can't believe I am typing a question for a simple thing like this but here we are. I can't for ... from:https://stackoverflow.com/questions/9120500/vim-settings-file-on-windows...

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

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wpf - Why MVVM and what are it's core benefits?

(This question already has answers here): question from:https://stackoverflow.com/questions/1644453/why-mvvm-and-what-are-its-core-benefits...

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jvm - Inlining in Java

In C++ I can declare a method "inline" and the compiler is likely to inline it. As far as I ... ? question from:https://stackoverflow.com/questions/1159087/inlining-in-java...

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Error: formControlName must be used with a parent formGroup directive. You'll want to add a formGroup directive - Angular reactive forms

I have the following template. I'm trying to get to grips with reactive forms but am having a problem. < ... formcontrolname-must-be-used-with-a-parent-formgroup-directive-youll-wa...

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

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python - Pandas: Difference between largest and smallest value within group

Given a data frame that looks like this GROUP VALUE 1 5 2 2 1 10 2 20 1 7 I would like ... com/questions/40183800/pandas-difference-between-largest-and-smallest-value-within-group...

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r - How to create a Marimekko/Mosaic plot in ggplot2

The Marimekko/Mosaic plot is a nice default plot when both x and y are categorical variables. What is the ... questions/19233365/how-to-create-a-marimekko-mosaic-plot-in-ggplot2...

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symfony - How to get file upload without a form

my controller receives post data. It's not from a Symfony generated form, but from an AngularJS custom form using ... com/questions/18400216/how-to-get-file-upload-without-a-form...

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

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c# - To call this method, the "Membership.Provider" property must be an instance of "ExtendedMembershipProvider"

Currently whenever I try to register a user or login using the default membership services built into ASP.Net ... method-the-membership-provider-property-must-be-an-instance-of...

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

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node.js - Can nodejs generate SSL certificates?

I'm writing a proxy support HTTPS-HTTPS proxy. Before i use Python as the main programming language, ... //stackoverflow.com/questions/9519707/can-nodejs-generate-ssl-certificates...

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c# - how to convert Math.Ceiling result to int?

Math.Ceiling returns double because double may store much bigger numbers. However if i'm sure that int type is ... com/questions/8832978/how-to-convert-math-ceiling-result-to-int...

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How to read partitioned parquet files from S3 using pyarrow in python

I looking for ways to read data from multiple partitioned directories from s3 using python. data_folder/serial_number= ... partitioned-parquet-files-from-s3-using-pyarrow-in-python...

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

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java - How to stop and resume Observable.interval emiting ticks

This will emit a tick every 5 seconds. Observable.interval(5, TimeUnit.SECONDS, Schedulers.io()) .subscribe( ... /35419062/how-to-stop-and-resume-observable-interval-emiting-ticks...

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conditional - Why would a language NOT use Short-circuit evaluation?

Why would a language NOT use Short-circuit evaluation? Are there any benefits of not using it? I see that ... /1445867/why-would-a-language-not-use-short-circuit-evaluation...

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backup - How do you back up your development machine?

(Closed). This question is opinion-based. It is not currently accepting answers. question from:https://stackoverflow.com/questions/26799/how-do-you-back-up-your-development-machine...

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

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webfonts - Packaging a font with a Google Chrome extension

I want to use something other than the standard fonts with my Chrome extension. I was excited about the ... /questions/19210451/packaging-a-font-with-a-google-chrome-extension...

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

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networking - Why doesn't wireshark detect my interface?

I just installed Wireshark, but when I click capture > interfaces, the dialog box appears, but it ... stackoverflow.com/questions/8255644/why-doesnt-wireshark-detect-my-interface...

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Merge javascript objects in array with same key

What is the best way to reorganize array into output? I need to merge all value keys (whether array or ... com/questions/33850412/merge-javascript-objects-in-array-with-same-key...

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Laravel 4 - when to use service providers?

I tried to google it but did not find detailed information. Service providers are a great way to group related ... .com/questions/20439583/laravel-4-when-to-use-service-providers...

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

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inline - JavaScript: IIF like statement

Coming from VB, JavaScript isn't very easy to get the hang of. Please don't be negative, I've ... from:https://stackoverflow.com/questions/8622580/javascript-iif-like-statement...

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

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php - Given a background color, black or white text?

I'm trying to find a method for determining whether to use black or white text, given a background color (as ... .com/questions/1331591/given-a-background-color-black-or-white-text...

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Is there a git-svn windows client something like TortoiseSVN?

I like TortoiseSVN's Windows integration. Is there something like that for dealing with git-svn? I'd even go ... 894360/is-there-a-git-svn-windows-client-something-like-tortoisesvn...

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

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networking - Why doesn't wireshark detect my interface?

I just installed Wireshark, but when I click capture > interfaces, the dialog box appears, but it ... stackoverflow.com/questions/8255644/why-doesnt-wireshark-detect-my-interface...

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

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