I am trying to follow this playgrounds tutorial:
https://www.raywenderlich.com/835-audiokit-tutorial-getting-started
I am trying to follow this part:
oscillator.rampTime = 0.2
oscillator.frequency = 500
AKPlaygroundLoop(every: 0.5) {
oscillator.frequency =
oscillator.frequency == 500 ? 100 : 500
}
But I am getting these errors:
error: Oscillators.xcplaygroundpage:13:1: error: value of type 'AKOscillator' has no member 'rampTime'
oscillator.rampTime = 0.2
^~~~~~~~~~ ~~~~~~~~
error: Oscillators.xcplaygroundpage:15:1: error: use of unresolved identifier 'AKPlaygroundLoop'
AKPlaygroundLoop(every: 0.5) {
I have imported the following:
import AudioKitPlaygrounds
import AudioKit
import PlaygroundSupport
I got rid of the first error by using oscillator.rampDuration instead of rampTime.
For the second error, 'import AudioKitUI' did the job.
Related
The browser console complains with:
Failed to register controller: test (controllers/test_controller) Error: Unable to resolve specifier 'stimulus'
[the highest line of source references points to where the error is triggere
if (!(name in registeredControllers)) {
importShim(path, 'http://localhost:3000/assets/stimulus-loading-1fc59770fb1654500044afd3f5f6d7d00800e5be36746d55b94a2963a7a228aa.js')
.then(module => registerController(name, module, application))
.catch(error => console.error(`Failed to register controller: ${name} (${path})`, error))
}
the last line points to the source of the problem:
// Eager load all controllers defined in the import map under controllers/**/*_controller
import { eagerLoadControllersFrom } from /*"#hotwired/stimulus-loading"*/'blob:http://localhost:3000/cf2bed28-84d1-496d-a453-7a2818e07002'
eagerLoadControllersFrom("controllers", application)
So clearly the app/javascript/controllers/test-controller.js is not firing properly. Its first line calling
import { Controller } from "stimulus"
Which I find odd, as app/javascript/controllers/application.js contains the stock code
How does one resolve the specifier 'stimulus'?
import { Application } from "#hotwired/stimulus"
const application = Application.start()
// Configure Stimulus development experience
application.debug = false
window.Stimulus = application
export { application }
have you tried this way? On app/javascript/controllers/test-controller.js write this way
import { Controller } from "#hotwired/stimulus";
Are vala enums not integer based? This example generates a "c" compile error. Not a big deal, but would like to understand why.
const int INT_UNINITIALIZED = 999;
public enum ScopeTypes {
/*OSS:Fix:GLib requires a default value, set GLOBALS = 0
(VSCodeDbgSvr.exe:31979): GLib-GObject-CRITICAL **: g_param_spec_enum: assertion 'g_enum_get_value (enum_class, default_value) != NULL' failed*/
NONE = INT_UNINITIALIZED,
GLOBALS = 0,
ARGUMENTS,
LOCALS,
EXCEPTIONS,
TOT_SCOPE_TYPES;
//Vala enums may have methods:
public bool is_global() {
return (this == GLOBALS || this == EXCEPTIONS);
}
public bool is_function() {
return (this == ARGUMENTS || this == LOCALS);
}
public bool is_valid() {
return (this != NONE);
}
}
The compile output:
> Executing task: /opt/vala/bin/valac helloworld.vala class1.vala --pkg libvala-0.40 -X -I/opt/vala/include/vala-0.40 -X -O0 --vapidir=/opt/vala/share/vala/vapi --debug --save-temps -o helloworld.exe <
/media/george/SharedData/Projects/Vala/Examples/playground-2/helloworld.c:82:21: error: ‘INT_UNINITIALIZED’ undeclared here (not in a function)
SCOPE_TYPES_NONE = INT_UNINITIALIZED,
^~~~~~~~~~~~~~~~~
error: cc exited with status 256
Compilation failed: 1 error(s), 1 warning(s)
The terminal process terminated with exit code: 1
The relevant part of the error message is:
error: ‘INT_UNINITIALIZED’ undeclared here (not in a function)
The C compiler is complaining that it can not find the declaration of your constant. So it is not a type problem at all.
It is a scope / ordering problem.
If you compile the code with valac -C you get a .c file that looks something like this:
typedef enum {
SCOPE_TYPES_NONE = INT_UNINITIALIZED,
SCOPE_TYPES_GLOBALS = 0,
SCOPE_TYPES_ARGUMENTS,
SCOPE_TYPES_LOCALS,
SCOPE_TYPES_EXCEPTIONS,
SCOPE_TYPES_TOT_SCOPE_TYPES
} ScopeTypes;
#define INT_UNINITIALIZED 999
Note how the Vala compiler has reordered the code to declare the enum first and the constant later.
Since in C the order of declarations in a file is important this can not compile.
I would consider this to be a compiler bug and you may want to report this to the GNOME bugtracker (product Vala).
I am new to the gatling load test. And i want to load test my simple project.But I got the error on response(406 not acceptable) and my gatling code is below
import io.gatling.core.Predef._
import io.gatling.http.Predef._
class simu extends Simulation {
val httpConf = http
.baseURL("http://172.24.15.225:10050/sample")
.header(HttpHeaderNames.Accept, HttpHeaderValues.ApplicationJson)
.acceptHeader("application/json, text/plain, */*")
.acceptEncodingHeader("gzip, deflate")
.acceptLanguageHeader("en-US,en;q=0.5")
val scn = scenario("Scenario Name")
.exec(
http("request_1")
.post("http://172.24.15.225:10050/sample")
.header(HttpHeaderNames.Accept, HttpHeaderValues.ApplicationJson)
//.check(status.is(406))
.body(StringBody("""{ "inputData": "Wonderful" }""")).asJSON
)
setUp(scn.inject(atOnceUsers(30)).protocols(httpConf))
}
And the response for the above is
failed in Response
Errors ------------------------------------------------------------
status.find.in(200,304,201,202,203,204,205,206,207,208,209),
but actually found 406
someone please correct my code.
But the RestAPI(postman) returns response correctly.
finally i found an answer. There is no error in the gatling load test. But the problem is my backend coding. I have changed my response from String type into the JSON format like below
object ServiceJsonProtocol extends DefaultJsonProtocol {
implicit val RequestProtocol : RootJsonFormat[Text] = jsonFormat1(Text)//request json format
implicit val ResponseProtocol : RootJsonFormat[SampleText] = jsonFormat1(SampleText) // response json format
}
It works fine
I am trying to run Twitter Streaming Example in Zeppelin. After I searched around, I added "org.apache.bahir:spark-streaming-twitter_2.11:2.0.0" into Spark Interpreter. So I can make the first part work, as in:
Apache Zeppelin 0.6.1: Run Spark 2.0 Twitter Stream App
Now I am trying to add the second half as:
case class Tweet(createdAt:Long, text:String, screenName:String)
twt.map(status=>
Tweet(status.getCreatedAt().getTime()/1000, status.getText(), status.getUser().getScreenName())
).foreachRDD(rdd=>
rdd.toDF().registerTempTable("tweets")
)
Now I got the error:
<console>:56: error: not found: type StreamingContext
val ssc = new StreamingContext(sc, Seconds(2))
^
<console>:56: error: not found: value Seconds
val ssc = new StreamingContext(sc, Seconds(2))
^
<console>:61: error: not found: value Seconds
val twt = tweets.window(Seconds(60))
Actually I added the case line, I got the above error. I really had no idea what happened here.
Any one has any clue here?
Here are details
Spark: 2.0.0
Zeppelin: 0.6.2
Thanks a lot.
=====================================================================
// All codes for your reference:
import org.apache.spark.streaming.twitter
import org.apache.spark.streaming._
import org.apache.spark.storage.StorageLevel
import scala.io.Source
import scala.collection.mutable.HashMap
import java.io.File
import org.apache.log4j.Logger
import org.apache.log4j.Level
import sys.process.stringSeqToProcess
import org.apache.spark.SparkConf
// ********************************* Configures the Oauth Credentials for accessing Twitter ****************************
def configureTwitterCredentials(apiKey: String, apiSecret: String, accessToken: String, accessTokenSecret: String) {...}
// ***************************************** Configure Twitter credentials ********************************************
val apiKey = ...
val apiSecret = ...
val accessToken = ...
val accessTokenSecret = ...
configureTwitterCredentials(apiKey, apiSecret, accessToken, accessTokenSecret)
// ************************************************* The logic itself *************************************************
val ssc = new StreamingContext(sc, Seconds(2))
val tweets = TwitterUtils.createStream(ssc, None)
val twt = tweets.window(Seconds(60))
twt.print
// above codes work correctly
// If added the following line, it failed with the above error
case class Tweet(createdAt:Long, text:String, screenName:String)
I had the same problem, and I have no idea why moving the import statements from the top to right before the new StreamingContext fixed it, but it did.
import org.apache.spark.streaming._ //moved here from top
import org.apache.spark.streaming.twitter._ //moved here from top
val ssc = new StreamingContext(sc, Seconds(2)) //existing
I had a similar issue. Using the FQCNs worked ok, so I ended up using that as a workaround.
I am trying the following code:
if (sem_post(sem) == -1)
{
printf("syncr_release error %d\n", errno);
perror("Error:");
return ERROR;
}
and it's giving the following output:
syncr_release error 9
Error:: Bad file descriptor
I cannot find anything about that error code in the documentation about sem_post(). How can I solve this?