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QUESTION
I have not found answer for this question but I'm almost 100% sure there is laying out somewhere.
I have a normal C++ class, and I'm using a 3rd party logging system. Unfortunately I have 2 requirements and 3 facts which I can't match:
Requirements:
- Log something in destructor
- Handle the program termination clean (without crash)
Facts:
- 3rd party logging system crashes on program termination, because it calls
pthread_mutex_lock
. - I don't want to change this logging system
- I also don't want to deepdive into it
Here is the code:
...ANSWER
Answered 2020-Jul-20 at 13:34Can I somehow detect in the destructor of a class (myClass) if program is terminating
Yes, if the instance has static storage. You can register a function that will be executed during destruction of static objects using std::atexit
. This function can be used to set a namespace scope variable that signifies whether the program is exiting or not. The destructor of your class can check the state of that variable.
You must make sure that the instance whose destructor relies on the variable is created before std::atexit
is called.
QUESTION
I'm trying to add the field externalDocs
to the generated Json from Springfox:
ANSWER
Answered 2018-Jun-21 at 15:39The version 2.7.0 added this feature.
To add this field externalDocs
, you can use the extensions
method from the Docket
:
QUESTION
This is the page I am trying to make it dynamic by enabling cross-filtering. So the thing is they are having multiple API.
For the top first two: TOTAL CASES
& DAILY CASES
They are using this API and the third one in the top is based on this API.
The bottom three AGE
, GENDER
, and NATIONALITY
are from this API.
In all the API one thing is common that is a date but there are some API in which some data are missing for few dates like there is a gap( Not available for some of the dates).
So I thought of combining all the JSON API in terms of dates and then allow cross filter because I believe I can enable cross-filtering between them. Correct me If I am wrong.
Like If I click on gender female since it gives info about total cases where the patient was female so only confirmed cases from the Total cases will change not the recovered, deaths as data is not available. SO I guess I should combine the top 3 charts together and gender, age and nationality charts, together. Then Dc js would be able to handle nicely filtering between each segments (cases related to landmark, cases related to person info).
Line 123:
...ANSWER
Answered 2020-May-05 at 15:16The answer to your first question is cut-and-dried: you don't need d3.queue, and it was deprecated and removed in d3@5.
As of d3@5, D3's data loading APIs use ES6 Promises instead of asynchronous callbacks, so you can use Promise.all([...])
instead of d3.queue. Apparently no way to make the new API emit errors when called in the old way, so it just fails silently. :-/
The new way to write your code is
QUESTION
This is a problem I am working on in google cloud platform with tensorflow v1.15
I am working on this notebook In this section, I am supposed to return a function that feeds model.train()
...ANSWER
Answered 2020-Jan-04 at 20:00The training-data-analyst
repository you mentioned, also has the solutions to all the notebooks.
From analysing the provided solution it looks like the def fn()
part is reduntant. the read_dataset
function should simply return a tf.Data.dataset
:
QUESTION
I'm not very deep into JPA Queries and have the current situation:
...ANSWER
Answered 2019-Jan-07 at 16:17The query will be like:
QUESTION
I've been writing a simple console application as a part of exercise in project. Tasks are rather straightforward:
2nd method has to create nested directory tree where every folder name is Guid.
3rd method has to put empty file in chosen directory tree at specific level.
My main problem lies within 3rd method. Because while it works fine and creates file 'till third level of any directory, beyond that point it always throw "System.IO.DirectoryNotFoundException" - as it "can't find part of the path".
I use string as a container for path, but since it's few Guid set together it gets pretty long. I had similar problem with creating directory, but in order to work I had to simply put @"\?\" prefix behind the path. So is there any way to make it work, or maybe get around that?
Here are method that fails. Specifically it's
File.Create(PathToFile + @"\blank.txt").Dispose();
And part of code which makes string and invokes it:
...ANSWER
Answered 2018-Dec-31 at 20:03You problem is that File.Create
doesn't create the corresponding directories for you, instead it throws a System.IO.DirectoryNotFoundException
.
You have to create those directories yourself, by using System.IO.Directory.CreateDirectory()
If this exception occurs because of a too long path, you can still use the "long path syntax (\\?\)" like you did when creating your directories.
See also this question: How to deal with files with a name longer than 259 characters? there is also a good article linked
QUESTION
I am currently running through this tutorial using my own data to expand my understanding of how to use Dataflow and ML Engine on the Google Cloud Platform. I used the preproc_tft tutorial as this resembles what I plan to do with my own data. When I execute this code from the tutorial I received this error:
UnimplementedError: Cast string to float is not supported
[[Node: head/ToFloat = Cast[DstT=DT_FLOAT, SrcT=DT_STRING, _device="/job:localhost/replica:0/task:0/device:CPU:0"](head/labels)]]
The csv file was split into many smaller csv's during my preprocessing step so they will need to be combined so a dataset can be created.
My Code:
...ANSWER
Answered 2018-Apr-17 at 05:48You can use Dataset.skip(1)
to skip an element of a dataset.
However, this runs into a slight problem with tf.data.TextLineDataset(file_list)
, because it will only skip the first line of the first file. Fortunately, you can use Dataset.flat_map()
to loop over the filenames and skip the first line of each file, as follows:
QUESTION
I started using Stanford-Deepdive a while ago. I am currently facing the problem, that deepdive will interpret some of the rows he gets as incomplete.
...ANSWER
Answered 2017-Oct-03 at 09:34I found the problem. It was caused by a singular TAB (\t) entry. I replaced that by a singe SPACE and in the end it would not be a valid antry anymore
so if you use some text for deepdive you will want to treat etrys consisting of a single SPACE as if they were empty.
QUESTION
I'm actually working for a startup I'm building with two other founders. On the side I would like to develop a quick prototype to be able to deepdive into a subject I can use on my project : beacons.
Here is what I want to achieve : I want to be able to use a device as an emitter (using bluetooth, BLE, or wifi) and the other one to be able to know when it enters the first one range. I need that to be able to do indoor localization (just a check in system, not to know exactly where people are in that specific location).
I'm used to code mobile application with Ionic and I'm more a Javascript developer. I saw that there is already something which fit to my needs : Dazting which transform every device mobile as "a beacon" with either bluetooth or Wifi. Problem, I want to do it on my own but to be honest I don't really now how they manage to do that with Wifi. I know that there are some libraries to emit with BLE but what about bluetooth ?
Does it mean I'll have to code it with native code ?
This is what I want to achieve :
- Coding an hybrid app (will loose less time and one app for every platform)
- Transforming the mobile device into an emitter : with bluetooth or wifi
- Be able to know the distance between a device which will emit and a one that will receive the signal
- I don't want to go with beacons : I'm not going to use macro-location and buying beacons for my project at the start is not something we would like to do.
Any ideas or suggestions on how did Datzing manage to reach that goal ?
Thanks in advance.
...ANSWER
Answered 2017-Mar-05 at 16:05Datzing relies on emission of Bluetooth Classic, Bluetooth LE and WiFi packets from a mobile device that is made discoverable, either programmatically or through manual selection in settings. The unique MAC address or SSID of the device can then be used to tie the detected transmission to a registered "Beacon" on the Datzing system. Basically it just registers the unique identifier associated with a Bluetooth or WiFi transmission with the Datzing servers so they can have meaning.
Using this technology to transmit on an iOS device is severely limited due to operating system restrictions. Users essentially have to manually go to settings screens to start the emissions. Android devices are much more flexible if you have a native app granted the proper permissions.
On the detection side, iOS is also much more limited than Android due to the operating system blocking access to raw MAC addresses of bluetooth devices and preventing detecting SSIDs of WiFi access points unless the network is connected. As of Android 6.0, access to the raw MAC address is also restricted, making such a system work less well with Bluetooth on newer Android devices.
On both platforms, iOS and Android, the ability to use these techniques to the extent they are allowed by the operating system are possible with native code. Doing so with Ionic or Cordova would require cobbling together a number of plugins (if they even exist) to bridge to the native features to access WiFi SSIDs and do Bluetooth discovery and scanning. This is unlikely to be a quick protoype.
Word of caution: It is always a good idea to try out a system like Datzing before trying to reproduce it yourself, as limitations often cause technologies not to live up to the claims of the marketing materials.
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