Pyspark Dataframe Default storagelevel for persist and cache() - pyspark

P is a dataframe.
I observed below behaviour in storagelevel:
P.cache()
P.storageLevel
StorageLevel(True, True, False, True, 1)
P.unpersist()
P.StorageLevel
StorageLevel(False, False, False, False, 1)
P.persist()
StorageLevel(True, True, False, True, 1)
This shows default for persist and cache is MEM_DISk
BuT I have read in docs that Default for cache is MEM_ONLY
Pleasehelp me in understanding.

From PySpark documentation:
Note The default storage level has changed to MEMORY_AND_DISK to match Scala in 2.0.
As you can find here: Latest PySpark docs

Related

Flutter - Jitsi Meet I want to add new options or at least modify an option

I'm trying to add new option like invite more people not by link but with a call notification.
anyone solved this issue ?? please help.
you can use feature flages like below
Map<FeatureFlag, Object> featureFlags = {
FeatureFlag.isMeetingNameEnabled: false,
FeatureFlag.isServerUrlChangeEnabled: true,
FeatureFlag.isChatEnabled: false,
FeatureFlag.isAddPeopleEnabled: false,
FeatureFlag.areSecurityOptionsEnabled: false,
FeatureFlag.isCalendarEnabled: false,
FeatureFlag.isCloseCaptionsEnabled: false,
FeatureFlag.isFilmstripEnabled: false,
FeatureFlag.isHelpButtonEnabled: false,
FeatureFlag.isInviteEnabled: false,
FeatureFlag.isLiveStreamingEnabled: false,
FeatureFlag.isLobbyModeEnabled: false,
FeatureFlag.isOverflowMenuEnabled: false,
FeatureFlag.isReactionsEnabled: false,
FeatureFlag.isRaiseHandEnabled: false,
FeatureFlag.isRecordingEnabled: false,
FeatureFlag.isReplaceParticipantEnabled: false,
};
var options = JitsiMeetingOptions(
isVideoMuted: true,
roomNameOrUrl: name,
userDisplayName: prefs.getString('username')!,
serverUrl: 'https://**********',
featureFlags: featureFlags,
);

Is there a way to get a warning about Array.from() when using "esversion": 5 and "futurehostile": true?

Got bitten by an IE bug (yeah, we're still using the old WebBrowser control) that I thought the dbaeumer.jshint extension would help me prevent...
Is there a way to get warning when using ES6 features, such as Array.from() in Visual Studio Code?
My global settings.json file contains this:
"jshint.reportWarningsAsErrors": true,
"jshint.lintHTML": true,
"jshint.options":{
"unused": true,
"esversion": 5,
"futurehostile": true,
"jquery": true,
"browser": true,
"eqeqeq": true,
"curly": true,
"strict": "global",
"devel": true,
"-W097": true,
},
I thought "esversion": 5 would do the job, or even "futurehostile": true, but no such luck.
jshint has no issue with this line:
return Array.from(el.childNodes).slice(-1)[0].data;
(The tooltip shown for from is just any, which is suspicious, but there is nothing in the Problems panel.

Azure Data Factory Data Flow using Cached Lookup into select task

I'm trying to use Data Flow Cached Lookups to implement a dynamic columns mapping from from a SQL source to a SQL destination. The idea is to persists a map on a metadata table, read as source into the Data Flow and store as Cached Lookup. It looks like this:
(The Key Columns is set to sourceField)
Now we just need to use this map into a Rule Based Mapping into a Select transform in order to select mapped only columns and apply the target naming. The expression is the following:
This configuration will result in a runtime error on the Select task:
Do you have any idea why? The error message is not helpful.
Edit: below the full script definition
parameters{
sourceSchema as string ("dbo"),
sourceTable as string ("RiepilogoSocieta")
}
source(allowSchemaDrift: true,
validateSchema: false,
inferDriftedColumnTypes: true,
isolationLevel: 'READ_UNCOMMITTED',
format: 'table') ~> DatabookSource
source(output(
{_id} as integer,
sourceSchema as string,
sourceTable as string,
sourceField as string,
targetField as string,
targetType as string,
targetSchema as string,
targetTable as string
),
allowSchemaDrift: true,
validateSchema: false,
isolationLevel: 'READ_UNCOMMITTED',
format: 'table') ~> Objmetadata
DatabookSource select(mapColumn(
each(match(!isNull(CacheFieldsMap#lookup(name).targetField)),
CacheFieldsMap#lookup($$).targetField = $$)
),
skipDuplicateMapInputs: true,
skipDuplicateMapOutputs: true) ~> MapColumns
Objmetadata filter(sourceSchema == $sourceSchema && sourceTable == $sourceTable) ~> FilterForSourceTable
FilterForSourceTable select(mapColumn(
sourceField,
targetField
),
skipDuplicateMapInputs: true,
skipDuplicateMapOutputs: true) ~> SelectFieldsMap
MapColumns derive({_createdAt} = currentTimestamp(),
{_updatedAt} = currentTimestamp()) ~> AddMetaColums
AddMetaColums sink(allowSchemaDrift: true,
validateSchema: false,
deletable:false,
insertable:true,
updateable:false,
upsertable:false,
truncate:true,
format: 'table',
skipDuplicateMapInputs: true,
skipDuplicateMapOutputs: true,
errorHandlingOption: 'stopOnFirstError') ~> AnalyticsSink
SelectFieldsMap sink(skipDuplicateMapInputs: true,
skipDuplicateMapOutputs: true,
keys:['sourceField'],
store: 'cache',
format: 'inline',
output: false,
saveOrder: 1) ~> CacheFieldsMap
Post the DSL script(click on script button). I can't make out what patterns $$ is mapping to. Make sure that is datatype compatible and not passing integer types for string parameters to lookup.

How do I disable specific commands in discord.js-commando

So I have been searching for a while now but I cant find a way to disable the default commands for commando I looked at this article:How to disable defaults commands on discord.js-Commando?. But it didn't work for me here is my main.js code.
You can do it like this if you just want to remove the default commands but keep the default types and groups provided by commando.
client.registry
.registerGroups([
['administrator', 'administrator commands'],
['moderation', 'moderation commands'],
['members', 'member commands'],
['economy', 'economy'],
['misc', 'misc commands'],
])
.registerDefaultTypes()
.registerDefaultGroups()
.registerDefaultCommands({
help: false,
prefix: false,
ping: true,
eval: true,
unknownCommand: false,
commandState: false,
})
.registerCommandsIn(path.join(__dirname, 'cmds'))

Decoding the *.gwt.rpc file generated as per GWT's serialization policy

I'm trying to do a bit of background reading on GWT RPC serialization policy and found that GWT whitelists the serializable types in a *.gwt.rpc file post compilation.
The following is an excerpt of one such .gwt.rpc file generated in my application:
com.subex.rocforms.sample.client.gwt.demo.PriorityModel, true, true, true, true, com.subex.rocforms.sample.client.gwt.demo.PriorityModel/3885356691, 3885356691
com.subex.rocforms.sample.client.gwt.demo.TeamModel, true, true, true, true, com.subex.rocforms.sample.client.gwt.demo.TeamModel/3447853257, 3447853257
com.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupDateModel, true, true, true, true, com.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupDateModel/2876933254, 2876933254
[Lcom.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupDateModel;, true, true, true, true, [Lcom.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupDateModel;/2086898801, 2086898801
com.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupMemberModel, true, true, true, true, com.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupMemberModel/471099479, 471099479
[Lcom.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupMemberModel;, true, true, true, true, [Lcom.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupMemberModel;/2005061951, 2005061951
com.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupModel, true, true, true, true, com.subex.rocforms.sample.client.gwt.demo.dayGroup.DayGroupModel/2207687264, 2207687264
com.subex.rocforms.sample.client.gwt.demo.dayGroup.TimeStringModel, true, true, true, true, com.subex.rocforms.sample.client.gwt.demo.dayGroup.TimeStringModel/335976723, 335976723
com.subex.rocforms.sample.client.gwt.demo.scheduleGrid.ComponentModel, true, true, true, true, com.subex.rocforms.sample.client.gwt.demo.scheduleGrid.ComponentModel/2493196280, 2493196280
[Lcom.subex.rocforms.sample.client.gwt.demo.scheduleGrid.ComponentModel;, true, true, true, true, [Lcom.subex.rocforms.sample.client.gwt.demo.scheduleGrid.ComponentModel;/3060182407, 3060182407
Can anybody explain what the four flags quoted after the type in each row indicate?
The best answer to that, other than poking into the code of course, is reading the Brian Slesinsky's reverse engineering notes about the GWT-RPC format. Have a look under the policy file format subsection and you'll find your answer.