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kandi X-RAY | primer Summary
kandi X-RAY | primer Summary
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QUESTION
I am trying to contribute to a Github Page/Jekyll site and want to be able to visualise changes locally but when I run bundle exec jekyll serve
but I get this output:
ANSWER
Answered 2021-Feb-02 at 16:29I had the same problem and I found a workaround here at https://github.com/jekyll/jekyll/issues/8523
Add gem "webrick"
to the Gemfile in your website. Than run bundle install
At this point you can run bundle exec jekyll serve
For me it works!
QUESTION
I am trying all the ways to change the title after going from the button to the home screen. The main screen shows me, and the title does not want to change in any way.I want the title to be shown "Главная". I've reviewed all of YouTube, downloaded projects from github, and I can't find a solution
Main controller:
...ANSWER
Answered 2021-Jun-12 at 21:55The problem lies within this source code.
QUESTION
Hi I am solving a question of book C++ Primer by Stanley. The question is :-
Write a program to read standard input a line at a time. Modify your program to read a word at a time.
I have used select variable through which user can switch to desired output i.e whether to print a line or a word. The Line output is coming right. But, the word output is not coming right. As, I want to print word before space. But it's printing whole sentence even after whitespaces.
Code below :-
...ANSWER
Answered 2021-Jun-11 at 12:58It's because of the while
-loop. Remove it and the program work as expected.
QUESTION
Running with sound null safety
TypeError: Cannot read property 'app' of undefined
at Object.app$ [as app] (http://localhost:49841/packages/firebase_core_web/src/interop/core.dart.lib.js:42:101)
at new cloud_firestore_web.FirebaseFirestoreWeb.new (http://localhost:49841/packages/cloud_firestore_web/src/write_batch_web.dart.lib.js:988:64)
at Function.registerWith (http://localhost:49841/packages/cloud_firestore_web/src/write_batch_web.dart.lib.js:842:73)
at Object.registerPlugins (http://localhost:49841/packages/nse7a/generated_plugin_registrant.dart.lib.js:33:46)
at main (http://localhost:49841/web_entrypoint.dart.lib.js:41:35)
at main.next ()
at runBody (http://localhost:49841/dart_sdk.js:37229:34)
at Object._async [as async] (http://localhost:49841/dart_sdk.js:37260:7)
at main$ (http://localhost:49841/web_entrypoint.dart.lib.js:40:18)
at http://localhost:49841/main_module.bootstrap.js:19:10
at Array.forEach ()
at window.$dartRunMain (http://localhost:49841/main_module.bootstrap.js:18:32)
at :1:8
at Object.runMain (http://localhost:49841/dwds/src/injected/client.js:8656:21)
at http://localhost:49841/dwds/src/injected/client.js:22068:19
at _wrapJsFunctionForAsync_closure.$protected (http://localhost:49841/dwds/src/injected/client.js:3830:15)
at _wrapJsFunctionForAsync_closure.call$2 (http://localhost:49841/dwds/src/injected/client.js:10905:12)
at Object._asyncStartSync (http://localhost:49841/dwds/src/injected/client.js:3794:20)
at main__closure1.$call$body$main__closure (http://localhost:49841/dwds/src/injected/client.js:22080:16)
at main__closure1.call$1 (http://localhost:49841/dwds/src/injected/client.js:22007:19)
at StaticClosure._rootRunUnary [as call$2$5] (http://localhost:49841/dwds/src/injected/client.js:4153:16)
at _CustomZone.runUnary$2$2 (http://localhost:49841/dwds/src/injected/client.js:12136:39)
at _CustomZone.runUnaryGuarded$1$2 (http://localhost:49841/dwds/src/injected/client.js:12068:14)
at _ControllerSubscription._sendData$1 (http://localhost:49841/dwds/src/injected/client.js:11697:19)
at _DelayedData.perform$1 (http://localhost:49841/dwds/src/injected/client.js:11849:59)
at _PendingEvents_schedule_closure.call$0 (http://localhost:49841/dwds/src/injected/client.js:11898:14)
at Object._microtaskLoop (http://localhost:49841/dwds/src/injected/client.js:3990:24)
at StaticClosure._startMicrotaskLoop (http://localhost:49841/dwds/src/injected/client.js:3996:11)
at _AsyncRun__initializeScheduleImmediate_internalCallback.call$1 (http://localhost:49841/dwds/src/injected/client.js:10774:9)
at invokeClosure (http://localhost:49841/dwds/src/injected/client.js:1250:26)
at MutationObserver. (http://localhost:49841/dwds/src/injected/client.js:1269:18)
ERROR - 2021-03-28 17:45:59.793377
GET /web_entrypoint.dart.lib.js:40:18
Error thrown by handler.
FormatException: Illegal scheme character (at character 4)
web_entrypoint.dart.lib.js:40:18
^
dart:core _Uri.resolve
package:flutter_tools/src/isolated/devfs_web.dart 503:57 WebAssetServer._resolveDartFile
package:flutter_tools/src/isolated/devfs_web.dart 395:17 WebAssetServer.handleRequest
package:dwds/src/handlers/injector.dart 110:32 DwdsInjector.middleware..
...ANSWER
Answered 2021-Mar-28 at 19:01I'll try to break it up as much as possible, but there are plenty of things to be done.
- As per the documentation, when working with Flutter Web and Firebase, you need to add your Firebase dependencies in your index.html, like this:
Use the dependencies that you want, but if you aren't using analytics, leave it out. You have to import this first thing though firebasejs/8.3.0/firebase-app.js
QUESTION
I need help. I'm making a program using the youtube library, for c#.
For songs it works perfect. The problem is in the playlist I want to recover "videoId" to add it to a database, to put the videos in "queue".
I am using this method:
...ANSWER
Answered 2021-Jun-05 at 06:08Instead of going to every path you can use below code :
QUESTION
while I came across this snippet in <>
...ANSWER
Answered 2021-Jun-01 at 23:34Neither in C nor in C++ there exists a straight-forward manner to pass a C-style array by value (see e.g. here). A C-style array - if not wrapped by a class or struct - is actually only passed as a pointer. This also leads to problems with template deduction as a pass by value decays to a simple pointer and therefore the compiler can't deduce the template argument. Therefore the common approach is to either pass it by const
or non-const
reference or to switch to an std::array
if a copy is needed. I don't think the second version of your template actually does what you want it to do.
Your initial code
QUESTION
Hello I am on chapter 19 from C++ primer 5th edition. 'Operator new
and delete
vs new
and delete
expression and placement new
':
AFAIK operator new
and operator delet
e allocate and deallocate memory respectively but don't construct an object there. On the other hand a new-expression
calls operator new
to allocate memory, construct an object in that memory address and finally returns a pointer to the newly allocated and initialized object.
So for the understanding sake I've tried this:
...ANSWER
Answered 2021-May-31 at 23:23Unless you use placement new (which is basically the other half of the ordinary new
), no Foo
object exists, so you can't call a member function on it. Moreover, if you do use placement new, you must call the destructor yourself:
QUESTION
There has been lots of questions/answers pertaining questions to constexpr expression but i have a question which is pretty close to other question but slightly different in another sense. Anyway here it goes.
...ANSWER
Answered 2021-May-26 at 03:53The constexpr
in B refers to the variable xf
, not the type (int & constexpr xf;
, although I don't know if that will compile). The variable xf
is a constexpr
and it has type int &
. This is why trying to bind it to x
fails.
QUESTION
C++ primer has the following description and example (p. 110):
...ANSWER
Answered 2021-May-25 at 18:39You need getline()
if you want to keep the whitespace:
QUESTION
I have a program that connects me to a database and shows me all the information in a JTable.
The problem is that I want to put a search engine because there will be many names in the table, I already looked for similar examples and I have tried to connect them to mine but I have not been able, that is why I ask for your help
...ANSWER
Answered 2021-May-22 at 15:36Assuming you want to search (buscar), not to filter.
Search in the selected column, starting in row below selected row. Just traverse the table model until you find the searched value and then select that row. Example for the ActionListener
for the button:
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