外文分享

问题 I've got a big database with analytics data written in JSON. I want to filter out rows with incorrect data: invalid json (some rows has something like that: '{"hello": "world' some attributes is not array so it would take '{"products": [1,2,3]}' and will leave out the '{"products": 1}' I want to do something like that: select * from analytics where (is_correct_json(json::json)) and (is_array(json::json->>'products')) How can I achieve that? 回答1: This is another good example why choosing the

问题 I've got a big database with analytics data written in JSON. I want to filter out rows with incorrect data: invalid json (some rows has something like that: '{"hello": "world' some attributes is not array so it would take '{"products": [1,2,3]}' and will leave out the '{"products": 1}' I want to do something like that: select * from analytics where (is_correct_json(json::json)) and (is_array(json::json->>'products')) How can I achieve that? 回答1: This is another good example why choosing the

问题 I have the following dataframe: land_cover 1 2 3 4 5 6 size 0 20 19.558872 6.856950 3.882243 1.743048 1.361306 1.026382 16.520265 1 30 9.499454 3.513521 1.849498 0.836386 0.659660 0.442690 8.652517 2 40 10.173790 3.123167 1.677257 0.860317 0.762718 0.560290 11.925280 3 50 10.098777 1.564575 1.280729 0.894287 0.884028 0.887448 12.647710 4 60 6.166109 1.588687 0.667839 0.230659 0.143044 0.070628 2.160922 5 110 17.846565 3.884678 2.202129 1.040551 0.843709 0.673298 30.406541 I want to plot the

问题 I am writing a service based app with a bound service, and the service's onBind() method never seems to be called (testing it with Toasts and Logs). The service: import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location

问题 I was hoping to trigger a Pub/Sub function (using functions.pubsub / onPublish) whenever a new Pub/Sub message is sent to a topic/subscription in a third-party project i.e. cross projects. After some research and experimentation I found that TopicBuilder throws an error if the topic name contains a / and it defaults to "projects/" + process.env.GCLOUD_PROJECT + "/topics/" + topic (https://github.com/firebase/firebase-functions/blob/master/src/providers/pubsub.ts). I also found a post in Stack

问题 I have a XML Schema that contains multiple imports which in turn contain imports. I need to generate semantically equal schema where all imports are inlined. I want to replace these: <xs:import namespace="http://some.name/" schemaLocation="./path/to/it.xsd"/> with the contents of referenced schemata. And I need to get output as a string, not as some internal representation. I tried Apache Xerces but did not find a way to write XSModel to a string. Is there? I tried Apache XmlSchema 2 but when

问题 I have the following dataframe: land_cover 1 2 3 4 5 6 size 0 20 19.558872 6.856950 3.882243 1.743048 1.361306 1.026382 16.520265 1 30 9.499454 3.513521 1.849498 0.836386 0.659660 0.442690 8.652517 2 40 10.173790 3.123167 1.677257 0.860317 0.762718 0.560290 11.925280 3 50 10.098777 1.564575 1.280729 0.894287 0.884028 0.887448 12.647710 4 60 6.166109 1.588687 0.667839 0.230659 0.143044 0.070628 2.160922 5 110 17.846565 3.884678 2.202129 1.040551 0.843709 0.673298 30.406541 I want to plot the

问题 I understand why using 'shell=True' can be a security risk if you have untrusted input. However, I don't understand how 'shell=False' avoids the same risks. Presumably if I wanted to allow a user to provide an input he might input: var="rm -rf /" My code might simply: subprocess.call(var,shell=True) # bad stuff Or I might do: varParts=var.split() subprocess.call(varParts,shell=False) # also bad, right? It would seem that the assumption is one wouldn't go through the trouble of processing the

问题 I am writing a service based app with a bound service, and the service's onBind() method never seems to be called (testing it with Toasts and Logs). The service: import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location

问题 Whenever I'm trying to open Youtube player in my app, onInitializationSuccess() function is always called. But it shows a blank screen. First this error appears: W/YouTubeAndroidPlayerAPI: Forcefully created overlay:affq@82a17f5 helper:Lazy@9b7098a view:null status: ....... {...} and then: E/YouTubeAndroidPlayerAPI: Embed config is not supported in RemoteEmbeddedPlayer . Here is my code: FragmentManager fragmentManager = ((AppCompatActivity)this.context).getSupportFragmentManager();