copy | Go copy directory | File Utils library

std::vector and other containers (except std::array) are specified to have a copy constructor. This is not specified to be conditional on whether or not the element type is copyable. Only instantiation of the copy constructor's definition is forbidden if the element type is not copyable.

As a result std::is_copy_constructible_v on the container will always be true. There is no way to test whether an instantiation of a definition would be well-formed with a type trait.

It would be possible to specify that the copy constructor is not declared or excluded from overload resolution if the element type is not copyable. However, that would come with a trade-off which is explained in detail in this blog post: https://quuxplusone.github.io/blog/2020/02/05/vector-is-copyable-except-when-its-not/.

In short, if we want to be able to use the container with an incomplete type, e.g. recursively like

I've hit this same issue and have temporarily resolved it by uninstalling react-native-video (npm uninstall --save react-native-video). That's not a great answer as I need that component, but I don't have a full solution yet. I think somehow com.yqritc:android-scalablevideoview:1.0.4. is required by react-native-video but has gotten lost or removed. Other thoughts are welcome.

UPDATE: Resolved! In your build.gradle in your Android folder you need to add the repository "jcenter()" in allprojects (not in build dependencies) like this...

The way your container is built doesn't add a user, so everything is done as root.

You could create a user and install to that users's home directory by doing something like this;

It is a bug, you can downgrade using:

pip install "pip<22"

https://github.com/jazzband/pip-tools/issues/1558

The first one should probably be:

Updated answer 2021-11-16:

An option has been added to disable Length Authoring Tools in Chrome 96.

The following is mentioned in the official release notes for Chrome 96.

To disable Length Authoring Tools, navigate to this location in the DevTools and uncheck the checkbox:
Settings > Experiments > Enable CSS length authoring tools in the Styles pane.

But... The main issues regarding Length Authoring Tools have also been fully remedied in Chrome 96.

The initial incentive to disable these tools has been greatly diminished because of this.

A chevron will now appear to the right of the hovered value instead of reacting to clicks to the entire unit portion of it.

Copy paste now also works as intended.

Conclusion:
It is now possible to disable the Length Authoring Tools, but you might no longer need to.

Old answer:

You can't. (Though fixes are coming!)
It is not possible to toggle this feature in the current live stable release ( Chrome 95.0.4638.69 ).

Fixes have been added to Chromium ( [1], [2], [3] ) that are slowly making their way to the stable release of Chrome.

But help is on its way...

Chrome 96 is scheduled to be released on November 16 2021 (source), or ~3 weeks after October 28 according to this official tweet. It will at least contain a revert to free text editing of css properties (source). Hopefully version 96 will address the issue completely, but if it doesn't then the next major release is scheduled for January 4 2021 (If this issue is unresolved by then somebody at Google should be fired).

As for now, Chrome Canary seems to have these fixes implemented and might be considered an alternative solution to the issue if you find the current state of Length Authoring Tools unbearable.

Please be advised that Chrome Canary can be quite unstable.

This question and answer will be edited and corrected once there are real fixes in the live stable version.

std::memcpy(arr_copy, arr, sizeof arr); (your example) is well-defined.

std::memcpy(arr_copy, arr[0], sizeof arr);, on the other hand, causes undefined behavior (at least in C++; not entirely sure about C).

Multidimensional arrays are 1D arrays of arrays. As far as I know, they don't get much (if any) special treatment compared to true 1D arrays (i.e. arrays with elements of non-array type).

Consider an example with a 1D array:

How about something like:

For this problem, I don't recommend using Kmeans color quantization since this technique is usually reserved for a situation where there are various colors and you want to segment them into dominant color blocks. Take a look at this previous answer for a typical use case. Since your CT scan images are grayscale, Kmeans would not perform very well. Here's a potential solution using simple image processing with OpenCV:

1. Obtain binary image. Load input image, convert to grayscale, Otsu's threshold, and find contours.

2. Create a blank mask to extract desired objects. We can use np.zeros() to create a empty mask with the same size as the input image.

3. Filter contours using contour area and aspect ratio. We search for the lung objects by ensuring that contours are within a specified area threshold as well as aspect ratio. We use cv2.contourArea(), cv2.arcLength(), and cv2.approxPolyDP() for contour perimeter and contour shape approximation. If we have have found our lung object, we utilize cv2.drawContours() to fill in our mask with white to represent the objects that we want to extract.

4. Bitwise-and mask with original image. Finally we convert the mask to grayscale and bitwise-and with cv2.bitwise_and() to obtain our result.

Here is our image processing pipeline visualized step-by-step:

Grayscale -> Otsu's threshold

Detected objects to extract highlighted in green -> Filled mask

Bitwise-and to get our result -> Optional result with white background instead

Code