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Python: how to capture image from webcam on click using OpenCV

I want to capture and save a number of images from my webcam using OpenCV. This is my code currently: import cv2 ... /python-how-to-capture-image-from-webcam-on-click-using-opencv...

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I am currently working on an intrusion system based on video surveillance. In order to complete this task, ... .com/questions/27035672/cv-extract-differences-between-two-images...

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Using sendmail from bash script for multiple recipients

I'm running a bash script in cron to send mail to multiple recipients when a certain condition is met ... questions/13390894/using-sendmail-from-bash-script-for-multiple-recipients...

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

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iphone - How to wrap a Struct into NSObject

this is supposed to be trivial I think, but I can't find a way how to wrap a Struct variable into an ... ://stackoverflow.com/questions/5691881/how-to-wrap-a-struct-into-nsobject...

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

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c# - Reading non-standard elements in a SyndicationItem with SyndicationFeed

With .net 3.5, there is a SyndicationFeed that will load in a RSS feed and allow you to run ... /319591/reading-non-standard-elements-in-a-syndicationitem-with-syndicationfeed...

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

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I am looking to turn the character 'a' into 97 in ruby 1.9.2 Ruby 1.8.7 irb(main):001:0> ?a ... :https://stackoverflow.com/questions/4111283/integer-value-of-a-character-in-ruby...

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

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objective c - Enable access for assistive devices programmatically on 10.9

I want to enable access for assistive devices programatically on 10.9. On 10.8 and lower I?was using ... /17693408/enable-access-for-assistive-devices-programmatically-on-10-9...

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

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open command prompt window and change current working directory

I'm terribly new to scripting on windows. Using windows 7 64. I'm trying to make a .bat file ... /questions/4717352/open-command-prompt-window-and-change-current-working-directory...

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unit testing - How can I test for an expected exception with a specific exception message from a resource file in Visual Studio Test?

Visual Studio Test can check for expected exceptions using the ExpectedException attribute. You can pass in an ... -an-expected-exception-with-a-specific-exception-message-from...

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c# - get unique machine id

I want to get unique unchangeable Machine id Like Processor serial number of the computer for distribute a software ... ://stackoverflow.com/questions/2004666/get-unique-machine-id...

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

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ubuntu 11.10 - git gui and gitk not present after installing git

I am using Ubuntu 11.10 and have just installed git using sudo apt-get install The basic git commands seem ... questions/14673257/git-gui-and-gitk-not-present-after-installing-git...

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

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linux - Is it possible to recursively create folders using shell script?

Im trying to create recursively level of directories like /folder1/folder2/folder3 Im trying this mkdir folder1/ ... -it-possible-to-recursively-create-folders-using-shell-script...

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

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excel - VBA using ubound on a multidimensional array

Ubound can return the max index value of an array, but in a multidimensional array, how would I specify ... .com/questions/26644231/vba-using-ubound-on-a-multidimensional-array...

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Error "Get https://registry-1.docker.io/v2/: net/http: request canceled" while building image

I am getting the below error while building an image Step 1/10 : FROM ubuntu:14.04 Get https://registry-1.docker ... https-registry-1-docker-io-v2-net-http-request-canceled-while-b...

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

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python - How to force migrations to a DB if some tables already exist in Django?

I have a Python/Django proyect. Due to some rolls back, and other mixed stuff we ended up in a kind of odd ... -force-migrations-to-a-db-if-some-tables-already-exist-in-django...

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java - Is it a bad idea to declare a final static method?

I understand that in this code: class Foo { public static void method() { System.out.println("in Foo"); } } ... questions/1932399/is-it-a-bad-idea-to-declare-a-final-static-method...

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

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java - How to get number of possible item of an Enum?

Is there a builtin way to get the number of items of an Enum with something like Myenum.length, Or do I have ... /questions/17492079/how-to-get-number-of-possible-item-of-an-enum...

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

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python - How to force migrations to a DB if some tables already exist in Django?

I have a Python/Django proyect. Due to some rolls back, and other mixed stuff we ended up in a kind of odd ... -force-migrations-to-a-db-if-some-tables-already-exist-in-django...

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

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node.js - Navigation Error in angular2

I have updated the angular packages version from 2.4.10 to 4.0.0 after updating i am getting the ... from:https://stackoverflow.com/questions/42994337/navigation-error-in-angular2...

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

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linux - How to duplicate a folder exactly

I am trying to copy a filesystem for a device I am programming for. After so much time trying to figure ... //stackoverflow.com/questions/19434921/how-to-duplicate-a-folder-exactly...

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textview - Android SpannableString set background behind part of text

I would like to create something similar as seen on this image: I managed to create evertyhing with ... /19292838/android-spannablestring-set-background-behind-part-of-text...

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.net - How can I get the assembly last modified date?

I want to render (for internal debugging/info) the last modified date of an assembly, so I'll know when a ... com/questions/804192/how-can-i-get-the-assembly-last-modified-date...

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android:visibility changes to children of MotionLayout

I must be missing something with android:visibility changes within a motion layout. Here's a ... com/questions/57168071/androidvisibility-changes-to-children-of-motionlayout...

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

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sql - Script to save varbinary data to disk

I have some varbinary data stored in a table in MS Sql Server 2005. Does anyone have SQL code that ... stackoverflow.com/questions/4056050/script-to-save-varbinary-data-to-disk...

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

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Ruby on Rails - link_to button / css

Ok so I am teaching myself RoR while developing a simple api & web interface. I have been following a ... stackoverflow.com/questions/4418004/ruby-on-rails-link-to-button-css...

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

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c# - Log4Net - How to add a 2nd logger used only for specific sections of code

I'm using Log4Net 2.0, I have it working as required but which to add another logger for specific log statements. ... to-add-a-2nd-logger-used-only-for-specific-sections-of-code...

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

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c++11 - Random Number Order in C++ using <random>

I have the following code, that I wrote to test a part of a larger program : #include <fstream> ... stackoverflow.com/questions/35060111/random-number-order-in-c-using-random...

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

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c# - ASP .NET Singleton

Just want to make sure I am not assuming something foolish here, when implementing the singleton pattern in ... from:https://stackoverflow.com/questions/2134511/asp-net-singleton...

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

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