Newbe Dev Stack

Answer : As long as your application complies with the regulations of AppGallery, there should not be any problem it. https://developer.huawei.com/consumer/en/doc/30202 AppGallery does not have any restriction on the language application developed with, no need to worry about it; flutter, cordova, react.native, xamarin they are fine. Just a point to take care. If you are using SDKs or services those depend on Google Play services, when you have published your application on AppGallery, it will be visible only for Huawei devices supports Google Play Services. In theory, yes it could. Huawei uses an OS called Harmony OS. The Arc compiler in Harmony OS supports all the major programming languages including C/, C++, Java, JavaScript and Kotlin. Flutter compiles Dart code to native device code (Java, and Kotlin for Android and Swift for iOS). Huawei is making an Arc compiler that supposedly makes it easy to turn Android apps to Harmony OS apps. What does this mean for Flutt...

Answer : I've finally fixed this issue myself, after struggling for a couple of hours (but felt a lot longer!). The breakthrough came when I actually cloned the Flutter Plugins Github repository that contains android_alarm_manager and poked around the example code and looked at how it was laid out in an IDE, rather than looking at isolated files online. The Readme is not very clear on what exactly to do, if you're not versed in Android Java development, but it becomes clear when you look at the working example code. You need to drop in the Application.java file they give you in the example directory into your actual project, in the same folder as your existing MainActivity.java file. The contents should look like this: package io.flutter.plugins.androidalarmmanagerexample; import io.flutter.app.FlutterApplication; import io.flutter.plugin.common.PluginRegistry; import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback; import io.flutter.plugins.Genera...

Answer : For those who are looking to change the color of the caret icon (dropdown arrow) in android, you could try adding the following line to your styles.xml: <item name="android:colorControlNormal">#FFFFFF</item> Should look like this: <resources> <!-- Base application theme. --> <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> <!-- Customize your theme here. --> <item name="android:colorControlNormal">#FFFFFF</item> </style> </resources> Once done, rebuild the app as changes made on native files will not hot reload. One possible solution is to overlay the existing the arrow with an absolutely positioned vector icon that is wrapped within a view that has a matching background color with the rest of the Picker container. This usually works well because the Picker arrow does not by default reposition itself based on the length o...

Example: charcount //Calculate the times a character occurs public static int charCount(String userInput) { //convert the string to a char array char[] StringArray = userInput.toCharArray(); //hashmap that stores the characters. key will be the time it occures HashMap < Character, Integer > charCount = new HashMap < Character, Integer > ();

Example 1: bootstrap link < link rel = " stylesheet " href = " https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css " integrity = " sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh " crossorigin = " anonymous " > Example 2: bootstrap starter template <! doctype html > < html lang = " en " > < head > <!-- Required meta tags --> < meta charset = " utf-8 " > < meta name = " viewport " content = " width=device-width, initial-scale=1, shrink-to-fit=no " > <!-- Bootstrap CSS --> < link rel = " stylesheet " href = " https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css " integrity = " sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T " crossorigin = " anonymous " > < title > Hell...

Answer : I think it has to do with an issue with npm. When using yarn to install the modules, everything works flawlessly. yarn add angularfire2 firebase tldr: Node: 8.4.0/npm: 5.2.0 has issues, yarn works You could try with: $ rm -rf node_modules/ $ npm install $ npm install angularfire2@latest --save or to change AngularFireDatabaseModule by AngularFireDatabase . I had no luck trying to reproduce your issue. I would suggest if this is still an issue for you trying the following: Check for differences between my configuration below and yours View the notes for configuring ionic3 here Reinstalling npm (sounds crazy but occasionally I do this and issues disappear and I see mine is a little newer than yours) npm configuration $npm ls -g --depth=0 /Users/pbrack/.nvm/versions/node/v8.5.0/lib ├── cordova@7.1.0 ├── cordova-check-plugins@3.0.1 ├── ionic@3.13.2 ├── ios-deploy@1.9.2 └── npm@5.4.2 Configuration Steps $ ionic start angularfire2test blank $ npm instal...

Answer : Edit: Since this answer was posted the docs (and likely, the API) of the GoogleMapReact element was changed to support children. Any child with lat and lng would be rendered at the corresponding location on the map, as also indicated by @Jobsamuel's answer. The onGoogleApiLoaded callback should not be used for this purpose, as it is inferior to the declarative style and would not be re-run if changes are made to the map. Original answer (outdated): This may not be entirely clear from the description in the Readme, but the maps argument is, in fact, the maps API object (and map is, of course, the current Google Map instance). Therefore, you should pass both to your method: onGoogleApiLoaded={({map, maps}) => this.renderMarkers(map, maps)} and use them: renderMarkers(map, maps) { let marker = new maps.Marker({ position: myLatLng, map, title: 'Hello World!' }); } Adding a marker on your map isn't as easy as we would like to, mo...

Answer : With newer Pandas versions, if someone is interested, here a slightly different solution with Pandas only: ax = data.plot(kind='hist',subplots=True,sharex=True,sharey=True,title='My title') You can use suptitle() : import pylab as pl from pandas import * data = DataFrame(np.random.randn(500).reshape(100,5), columns=list('abcde')) axes = data.hist(sharey=True, sharex=True) pl.suptitle("This is Figure title") I found a better way: plt.subplot(2,3,1) # if use subplot df = pd.read_csv('documents',low_memory=False) df['column'].hist() plt.title('your title') It is very easy, display well at the top, and will not mess up your subplot.

Answer : Note the example given is a left-handed, row major matrix . So the operation is: Translate to the origin first (move by - eye ), then rotate so that the vector from eye to At lines up with +z: Basically you get the same result if you pre-multiply the rotation matrix by a translation - eye : [ 1 0 0 0 ] [ xaxis.x yaxis.x zaxis.x 0 ] [ 0 1 0 0 ] * [ xaxis.y yaxis.y zaxis.y 0 ] [ 0 0 1 0 ] [ xaxis.z yaxis.z zaxis.z 0 ] [ -eye.x -eye.y -eye.z 1 ] [ 0 0 0 1 ] [ xaxis.x yaxis.x zaxis.x 0 ] = [ xaxis.y yaxis.y zaxis.y 0 ] [ xaxis.z yaxis.z zaxis.z 0 ] [ dot(xaxis,-eye) dot(yaxis,-eye) dot(zaxis,-eye) 1 ] Additional notes: Note that a viewing transformation is (intentionally) inverted : you multiply every vertex by this matrix to "move the world" so that the portion you want to s...

Answer : Wrap in quotes: onchange="{(e) => this.props.handleUpdateQuestion(e, firstQuestion.Id)}" otherwise, it should work just fine: textarea::-webkit-input-placeholder { color: #0bf; } textarea:-moz-placeholder { /* Firefox 18- */ color: #0bf; } textarea::-moz-placeholder { /* Firefox 19+ */ color: #0bf; } textarea:-ms-input-placeholder { color: #0bf; } textarea::placeholder { color: #0bf; } <textarea placeholder="test"></textarea> I am not sure but I think is not necessary to use the prefixes right now. textarea::placeholder { color: #fff; }

Example: how to print to the serial monitor arduino void setup ( ) { Serial . begin ( 9600 ) ; } void loop ( ) { // This will write to the monitor and end the line Serial . println ( "test text" ) ; // This will write to the monitor but will not end the line Serial . print ( "test text" ) ; }

Answer : OP here – I'd just like to add to the answer below, that I've been in contact with Apple Support. Explanation Apple claims that the poor Mono 8kHz quality which affects recording and indeed simultaneously playback on Mac when the AirPod microphones are activated, is because the SCO codec then gets employed over the entire Mac audio system. This is supposedly "expected behaviour" when trying to use the AirPods and other Bluetooth headsets together with a computer, according to Apple. The AAC codec is normally used when just listening to playback on the AirPods. It's just very unfortunate that SCO – low-quality as it may be – upon AirPod microphone activation is not only limited to doing recording, but also displaces AAC and audio playback. Apple Support claims that Apple is looking at this issue, and that improvements might be coming in future firmware updates, but I did not interpret that as a promise to be honest. But for the time being, I'd ...

Answer : Spark >= 3.0 : In Spark 3.0 OneHotEncoderEstimator has been renamed to OneHotEncoder : from pyspark.ml.feature import OneHotEncoderEstimator, OneHotEncoderModel encoder = OneHotEncoderEstimator(...) with from pyspark.ml.feature import OneHotEncoder, OneHotEncoderModel encoder = OneHotEncoder(...) Spark >= 2.3 You can use newly added OneHotEncoderEstimator : from pyspark.ml.feature import OneHotEncoderEstimator, OneHotEncoderModel encoder = OneHotEncoderEstimator( inputCols=[indexer.getOutputCol() for indexer in indexers], outputCols=[ "{0}_encoded".format(indexer.getOutputCol()) for indexer in indexers] ) assembler = VectorAssembler( inputCols=encoder.getOutputCols(), outputCol="features" ) pipeline = Pipeline(stages=indexers + [encoder, assembler]) pipeline.fit(df).transform(df) Spark < 2.3 It is not possible. StringIndexer transformer operates only on a single column at the time so you'll ne...

Example: youtube to mp4 ytmp3 . cc is the best by far

Answer : DHT and Peer Exchange are not tracker related, but program related, so yes they can find people who are downloading the same file but are not connected to the tracker you are using. Those people that are found might be either seeders or leechers. From this BiTorrent FAQ: When there are zero seeds for a given torrent (and not enough peers to have a distributed copy), then eventually all the peers will get stuck with an incomplete file, if no one in the swarm has the missing pieces. When this happens, someone with a complete file (a seed) must connect to the swarm so that those missing pieces can be transferred. This is called reseeding. Usually a request for a reseed comes with an implicit promise that the requester will leave his or her client open for some time period after finishing (to add longevity to the torrent) in return for the kind soul reseeding the file. Yes, it is true in practice - but not always. With no seeders, the...

Example: what is SQL SQL full form is a structured query language , and it allows you to interact through commands with the database . Here are some of the SQL Database functions : This allows users to retrieve information from the relational database . It enables the development of tables and databases . It allows data base and tables to be modified , added , removed , and changed . It gives protection , and allows permission to be set . Allows new ways for people to manage the info .