Given an Observable.timer(10000). Say, that I'd like to continuously update the timer and not allow it to emit, is it possible?
For example, at t = 2000, I want to increase the timeout time by 2000. Given this dynamic code change, the timer will now emit at t = 12000 rather than the original t = 10000.
try the code below.
Rx.Observable.fromEvent(document,"click")
.scan((curr,acc)=>++curr,0)
.flatMap(e=>{
console.log(e)
return Rx.Observable.timer(e*1000)}
)
.subscribe(console.log)
Related
I'm trying to save some rows values for multiple columns on multiple tabs in GAS, but it's taking a lot of time and I'd like to find a faster way of doing this, if there's any.
A project e.g:'Project1' -as a key- has a value associated with it which corresponds to the column where it's stored, the tabs are 600+ iterations long.
this script opens up a tab called 'person1' at first and goes through all the rows for the column that corresponds to that project in 'projects' dictionary (it's the same format for every tab, but more projects will be added in the future)
right now i'm iterating through the 'members' dictionary (length=m), then through the projects dictionary (length=p) and finally through the length of the rows (length='r'), in the meantime it access the other spreadsheet where I want to save all those rows.
This means that the current time complexity of my algorithm is O(mpr) and it's WAY too slow.
for 15 people and 6 projects each, the amount of iterations would be 156600+ = 54,000 iterations at least (more people and more projects and more rows will be added).
is there any way to make my algorithm faster?
const members = {'Person1':'P1', 'Person2':'P2'};
const projects = {'Project1':'L','Project2':'R'}
function saveRowValue() {
let sourceSpreadsheet = SpreadsheetApp.getActiveSpreadsheet();
let targetSpreadsheet = SpreadsheetApp.openById('-SPREADSHEET-');
let targetSheet = targetSpreadsheet.getSheetByName('Tracking time');
let rowsToWrite = [];
rowsToWrite.push(['Project', 'Initials', 'Date', 'Tracking time'])
var rowsToSave = 1;
for(m in members){
Logger.log(m +' initials:'+ members[m]);
let sourceSheet = sourceSpreadsheet.getSheetByName(m);
for(p in projects){
let values = sourceSheet.getRange(projects[p]+"1:"+projects[p]).getValues();
Logger.log(values)
let list = [null, 0,''];
for(var i=0; i<values.length; i++){
try{
date = sourceSheet.getRange('B'+i).getValue();
let val = sourceSheet.getRange(projects[p]+i)
val = Utilities.formatDate(val.getValue(), "GMT", val.getNumberFormat())
Logger.log(val);
if(!(list.includes(val)) && date instanceof Date){
//rowsToWrite.push();
rowsToSave++;
targetSheet.getRange(rowsToSave,1,1,4).setValues([[p, members[m], date, val]]);
}
}catch(e){
Logger.log(e)
}
}
}
}
Logger.log(rowsToWrite);
[Here you can see how much time it takes to iterate 600 rows for a single project and a single member after changing what Yuri Khristich told me to change][1]
[1]: https://i.stack.imgur.com/CnRZY.png
First step is to try to get rid of getValue() and setValue() in loops. All data should be captured at once as 2D arrays in one step and put on the sheet in one step as well. No single cell or single row operations.
Next trick depends on your workflow. Say, it's unlikely that every time all 54000+ cells need to be checked. Probably there are ranges that have no changes. You can figure out some way to indicate the changes. And process only the changed ranges. Probably, the indication could be performed with onChange() trigger. For example you can add * to the name of the sheets and columns where changes have occurred and remove these * whenever you run your script.
Reference:
Use batch operations
I am trying to change the number automatically after every five seconds between 1 to 90.
Here is my code,
public function getNumber(Request $request)
{
$numbers = rand(1, 90);
$data = array('message'=>ResponseMessage::statusResponses(ResponseMessage::_STATUS_DATA_FOUND), 'number'=>$numbers);
return $this->sendSuccessResponse($data);
}
Now, when I hit this I am getting the number between 1 to 90. I am getting different numbers whenever I hit.
But now, I just want that, when I hit it. It will start and after every 5 seconds number will change automatically.
Can we do that, if yes, please help me out. Thanks in advance.
you can use javascript for this and call your function or send ajax rewuest to your controller there:
window.setInterval(function(){
/// call your function here
}, 5000);
it will run every 5 secs
and for stop that :
clearInterval()
Need some opinion/help around one use case of KStream/KTable usage.
Scenario:
I have 2 topics with common key--requestId.
input_time(requestId,StartTime)
completion_time(requestId,EndTime)
The data in input_time is populated at time t1 and the data in completion_time is populated at t+n.(n being the time taken for a process to complete).
Objective
To compare the time taken for a request by joining data from the topics and raised alert in case of breach of a threshold time.
It may happen that the process may fail and the data may not arrive on the completion_time topic at all for the request.
In that case we intend to use a check that if the currentTime is well past a specific(lets say 5s) threshold since the start time.
input_time(req1,100) completion_time(req1,104) --> no alert to be raised as 104-100 < 5(configured value)
input_time(req2,100) completion_time(req2,108) --> alert to be raised with req2,108 as 108-100 >5
input_time(req3,100) completion_time no record--> if current Time is beyond 105 raise an alert with req3,currentSysTime as currentSysTime - 100 > 5
Options Tried.
1) Tried both KTable-KTable and KStream-Kstream outer joins but the third case always fails.
final KTable<String,Long> startTimeTable = builder.table("input_time",Consumed.with(Serdes.String(),Serdes.Long()));
final KTable<String,Long> completionTimeTable = builder.table("completion_time",Consumed.with(Serdes.String(),Serdes.Long()));
KTable<String,Long> thresholdBreached =startTimeTable .outerJoin(completionTimeTable,
new MyValueJoiner());
thresholdBreached.toStream().filter((k,v)->v!=null)
.to("finalTopic",Produced.with(Serdes.String(),Serdes.Long()));
Joiner
public Long apply(Long startTime,Long endTime){
// if input record itself is not available then we cant use any alerting.
if (null==startTime){
log.info("AlertValueJoiner check: the start time itself is null so returning null");
return null;
}
// current processing time is the time used.
long currentTime= System.currentTimeMillis();
log.info("Checking startTime {} end time {} sysTime {}",startTime,endTime,currentTime);
if(null==endTime && currentTime-startTime>5000){
log.info("Alert:No corresponding record from file completion yet currentTime {} startTime {}"
,currentTime,startTime);
return currentTime-startTime;
}else if(null !=endTime && endTime-startTime>5000){
log.info("Alert: threshold breach for file completion startTime {} endTime {}"
,startTime,endTime);
return endTime-startTime;
}
return null;
}
2) Tried the custom logic approach recommended as per the thread
How to manage Kafka KStream to Kstream windowed join?
-- This approach stopped working for scenarios 2 and 3.
Is there any case of handling all three scenarios using DSL or Processors?
Not sure of we can use some kind of punctuator to listen to when the window changes and check for the stream records in current window and if there is no matching records found,produce a result with systime.?
Due to the nature of the logic involve it surely had to be done with combination of DSL and processor API.
Used a custom transformer and state store to compare with configured
values.(case 1 &2)
Added a punctuator based on wall clock for
handling the 3rd case
Possible to somehow limit the update download 0.3 seconds using a ReactiveCocoa?
example:
if (the_previous_update == indefinitely)
{
update;
}
if else (current_time - the_previous_update>=0.3)
{
the_previous_update = current_time;
update;
}
else{
do nothing;
}
Maybe something like this?
RACSignal *updateSignal = ... // a signal that sends a 'next' whenever download has progressed.
[[updateSignal throttle:0.3] subscribeNext:^(id x) {
updateUI();
}];
Yes as #Grav says a throttle seems like the best operation for your use case. A throttle will basically store up next events and dispatch the last one received within your given time interval.
With a throttle you can make sure that you can update your UI every 0.3 seconds and be sure that the value that you use to update will be the last one received in that given time interval.
This differs from delay.
I have a BIRT report that displays some statistics of calls to a certain line on certain days. Now I have to add a new measeure called "call handling time". The data is collected from a MySQL DB:
TIME_FORMAT(SEC_TO_TIME(some calculations on the duration of calls in seconds),'%i:%s') AS "CHT"
I fail to display the duration in my crosstab in a "mm:ss"-format even when not converting to String. I can display the seconds by not converting them to a time/string but that's not very human readable.
Also I am supposed to add a "grand total" which calculates the average over all days. No problem when using seconds but I have no idea how to do that in a time format.
Which data types/functoins/expressions/settings do I have to use in the query, Data Cube definition and the cross tab cell to make it work?
Time format is not a duration measure, it cannot be summarized or used for an average. A solution is to keep "seconds" as measure in the datacube to compute aggregations, and create a derived measure for display.
In your datacube, select this "seconds" measure and click "add" to create a derived measure. I would use BIRT math functions to build this expression:
BirtMath.round(measure["seconds"]/60)+":"+BirtMath.mod(measure["seconds"],60)
Here are some things to watch out for: seconds are displayed as single digit values (if <10). The "seconds" values this is based on is not an integer, so I needed another round() for the seconds as well, which resulted in seconds sometimes being "60".
So I had to introduce some more JavaScript conditions to display the correct formatting, including not displaying at all if "0:00".
For the "totals" column I used the summary total of the seconds value and did the exact same thing as below.
This is the actual script I ended up using:
if (measure["seconds"] > 0)
{
var seconds = BirtMath.round(BirtMath.mod(measure["seconds"],60));
var minutes = BirtMath.round(measure["seconds"]/60);
if(seconds == 60)
{
seconds = 0;
}
if (seconds < 10)
{
minutes + ":0" + seconds;
}
else
{
minutes + ":" + seconds;
}
}