Installed Google Dart 1.0. Basically a Dart noob at this point...
angular.dart tutorial apps at - https://github.com/angular/angular.dart.tutorial
Seems broken or I am doing something wrong.
in chapter folders, file pubspec.yaml contains text: ../pubspec.yaml - which seems to be non yaml.
pub errors out with
Pub get failed, [1] Error in pubspec.yaml: The pubspec must be a YAML mapping.
There is a common pubspec.yaml in dir below chapter dirs, it contains legit yaml.
Even after editing chapter project pubspec.yaml with "common" pubspec legit yaml content and doing pub get, chapter 03..06 demos have missing package references.
Anyone who can tell me what I'm doing wrong appreciated.
There is a bug with the tutorial on Windows: https://github.com/angular/angular.dart.tutorial/issues/8
which should be fixed soon.
Having the same issue at present.
Short-term solution appears to not be to edit yaml files/links, (if you have, its probably best to re-download the tutorial files from fresh)
instead:
open the main.dart files in each affected example,
changes lines such as:
import 'package:angular_dart_demo/rating/rating_component.dart';
to
import '../lib/rating/rating_component.dart';
(you should see the ~ underlines disappear when you type this)
I think this has been due to some recent restructuring of the example files, since these were working until recently.
Related
I've just updated some depencencies in a React project using npm install and the updated project works nicely on all browser except Safari.
On Safari it shows a blanks screen and an error in the console:
SyntaxError: Invalid regular expression: invalid group specifier name
file: 2.f80ba52b.chunk.js
I can exclude breaking changes from updated dependencies, otherwise it would have broken on other browsers too. Despite that, I cannot figure out what is causing it.
Even if similar questions exist, and the root cause has been already recognized as the missing Safari support for lookbehind regex, I would like to provide a general way to handle those situations where, as described in the main question, you can not just fix a line of code - for example when the issue is caused by an external library.
How to handle broken external depencencies
In my case, the bug had been introduced with draft-js-utils 1.4.1, so I solved it downgrading to the first know working version (1.4.0). In order to achieve this, I edited the package.json file changing the dependency line from
"draft-js-utils": "^1.4.0"
to
"draft-js-utils": "1.4.0"
TIP: Avoiding the caret range, you can stick it to a specific version.
How to find broken external depencencies
The only way to find out what dependencies have been affected by this bug is to look for the error message in Github/Gitlab search - currently almost 300 public repositories have a related issue opened.
The hardest thing about this bug is that it could be hidden inside transitive dependencies.
You might not even know you are using that package.
If you are not lucky enough to spot it using a Github/Gitlab search, you could try with a local search using your IDE or grep. You need to look for the lookbehind symbols ?<!:
grep -r "?<\!" node_modules
Being a last resort, this approach could be either very slow or produce a huge-and-hard-to-read output.
A sad note
It looks like Webkit developers are not going to add lookbehind regex support soon - the issue has been created in July 2017 without receiving attention from them. Moreover, even if the Safari's issue has been recognized and tracked, no polyfill exists to fix it at the build level (e.g. using Babel).
I just want to add that I spent a week downgrading Babel and other packages to pre-2018 packages, only to realise that my problem was in a helper function within my own code that was to filter for malicious html code.
#lifeisfoo mentions to grep for the string '?<!' above in node_modules, but i recommend also grepping the entire project.
fyi, my regex that was breaking Safari was '?<=!'. Which is also an unsupported lookbehind
I tested my regex: (?<=![)(.*?)(?=]) in Safaris regex tester https://www.regextester.com/ and the output says 'Lookbehind is not supported in Javascript'
To end, I found Safaris console error message worthless and spread around the 10,000s of lines of the bundle.js, giving the impression that the issue was within the packages/dependancies, which it clearly was not.
I spent ages downgrading the packages only to find the same error message appear on a different line of the bundle.js code.
In the case of react native web we have a possibility to use files with .web and .android extensions.
Eg.
myFile.web.js
myFile.android.js
then we can include them via
import myFile from './myFile';
and React native web automatically provides proper file content depends on the platform.
It works so far but after I added Typescript the ts compiler started to complain about the missing module 'myFile' and it's logically okay because we don't have this file and TS compiler doesn't know that the RNWeb will automatically pick a proper file later.
When I disabling Typescript, everything works fine so the system is working.
The question is how to solve it in the case of Typescript?
Thanks for any help.
The only way I found how to avoid this issue is using CommonJS module system - require instead of ES6 - import standard
Example: const MyFile = require('./myFile')
In this case, the TS compiler will ignore it. Unfortunately, it isn't a perfect/right solution as I'd like to see but it works so I just use it as is.
P.S. If someone finds another way, please, provide your solution, I'll be appreciated.
I am trying to import DebugKit and CakePHP is producing the following error: DebugKit.ToolbarComponent could not be found.
Right below it, it says:
Create the class ToolbarComponent below in file:
/Users/SomeUser/Sites/SomeProject/app/Plugin/DebugKit//Controller/Component/ToolbarComponent.php
If you notice though, there are two slashes between DebugKit and Controller for some reason, and that's obviously not a real directory. The server running PHP 5.4.17. I have followed the exact installation instructions listed here. Any suggestions?
I had the same problem and solved it by changing the permissions to 755 to folders within DebugKit.
When I encountered this problem, I realized I had a Plugin/DebugKit folder structure in my project's root, and under the app directory. The one under app was empty, save for a blank file called empty. Strange. I have no idea how this happened. (Perhaps from accidentally running composer as non-root?) I deleted app/Plugin/DebugKit, and moved the one from the project root into app. No more error.
DebugKit does not currently seem to be compatible with cakephp 3.0 even though it is the example in the documentation.
The latest version still seems to use the 2.x methods.
I will also submit a ticket regarding this to update their documentation to prevent confusion.
If there is something I missed regarding this issue and it is actually possible to install this, let me know.
I have a Solr 4.0 module in my project (basically, a maven web project with all the solr dependencies). It worked pretty well, including content extraction and everything.
But, when I tested it with a .docx document, It gives me the following error:
13:50:34,468 ERROR [org.apache.solr.servlet.SolrDispatchFilter] (http--0.0.0.0-8080-9)
null:java.lang.RuntimeException: java.lang.NoSuchMethodError:
org.apache.poi.openxml4j.opc.PackagePart.getRelatedPart(Lorg/apache/poi/openxml4j/opc/PackageRelationship;)
Lorg/apache/poi/openxml4j/opc/PackagePart;
I tried to manually add the openxml4j dependency to the project. I've downloaded the sources and looked at it, the PackagePart#getRelatedPart really doesn't exist.
What is this error? How can I fix this?
Thanks in advance.
EDIT
I noticed that poi-ooxml already had those classes inside it. Cool, but I also inspected those sources, and still doesn't have the needed method in the PackagePart class.
BTW: I tried to add openxml4j version 1.0-beta.
It was a jarhell related issue.
Thanks, "jarhell related" was the clue I needed!
My project had POI jars prior to import of the Tika app jar, which includes its own POI jars. I deleted the standalone POI jars, and then Tika was able to handle DOCX Word 2013 file without error.
Now hopefully I won't run into a situation where I need both! :|
I'm trying to use jTwitter to get an oauth instance to twitter with my consumer key/secret and access token/secret. This is well documented in the javadoc here. I have downloaded signpost, signpost-jetty, and the jtwitter library, but after deploying and running the servlet, I get a error java.lang.NoClassDefFoundError: winterwell/jtwitter/OAuthSignpostClient Eclipse isn't complaining about the class not being there, because it is there-- I can see it in the JAR file itself, which is in my project. So, I said forget it, I'll try out OAuthScribeClient instead, but this generated a VERY SIMILAR ERROR java.lang.NoClassDefFoundError: org/scribe/oauth/Token This one confuses me even further because I have the following code in my java file, and it compiles without error or warning:
import org.scribe.oauth.Token;
Token token = new Token("myaccesstokeninfo", "accesstokensecret");
Clearly, I'm missing something very fundamental, but I am at an absolute loss as to what it may be. Thanks.
Usually "NoClassDefFoundError" happens when you forget to copy all jar-files to your "/war/WEB-INF/lib" directory, so those libs will be unavailable from server-side.
Xo4yHaMope is probably right.
If you're working from Eclipse but running using a web container, then your runtime classpath might be different from your project classpath - which can cause this error.
In order to complete Ben Winters answer what I actually did and worked is add the jar in
the libs folder within the project
see also here about folder hierarchy.
When you do this eclipse will normally add the jar to the android dependencies before launching the application. What I realise is that adding a jar in the build path will make classes available only during the build