I have a stream daysFromApi$ with data (days with meals) from API. When a 'delete' button is clicked, I push mealId to this.deleteBus$. I want to have a new value in the stream: daysAfterDelete$. My problem is that 'first' event is always triggered, but 'done' never triggers, flatMapLatest does not work, map neither.
const daysAfterDelete$ = this.deleteBus$
.log('first') // triggers when new mealId is pushed to deleteBus(a button is clicked)
.flatMapLatest(mealId => Bacon.combineAsArray(daysFromApi$, mealId))
.log('done'); // never triggers
I want to get following flow:
daysFromApi$ : A B C
deleteBus$ : 1 2 3
daysAfterDelete$: (1,A) (2,B) (3,B)
Not quite sure what you want to achieve, but if you want to get the latest value of "days" when the delete is clicked, you can use sampledBy. https://www.webpackbin.com/bins/-Ki3lTzM8PM4zeJKK9C0
Related
I'm using Dephi 10.1 Berlin and Access 2013.
My problem is related to TADODataSet.Cancel().
I want to show my user a message box asking for a confirmation before posting, in case data has been modified.
In the TADODataSet.BeforePost event, I added the following code:
if Application.MessageBox('Save changes?', '', 52) = idNo then
ADODataSet1.Cancel;
If the user click on btnNo, something unexpected happens.
Changes are canceled from the current record, but a new record with all fields empty is created.
The only field with some data is the one that was previously modified by the user.
If I cancel the modification via the cancel button of TDBNavigator, everything is fine.
If I simulate a click of the Cancel button of the TDBNnavigator in the BeforePost event:
if Application.MessageBox('Save changes?', '', 52) = idNo then
DBNavigator1.BtnClick(nbCancel);
I have the same behaviour, so a new empty record is created.
Any suggestion?
The help for TADODataSet.BeforePost says in part:
call Abort to cancel the Post operation (Delphi) or throw an exception (C++).
So:
if Application.MessageBox('Save changes?', '', 52) = idNo then
abort;
Note this is meant for preventing changes that don't pass validation (the common use for BeforePost) from being posted. It doesn't reset the edit buffers like cancel does. Usually that is a separate function in the UI so the user doesn't have to reenter all the changed data in the edits each time posting is rejected by calling abort in BeforePost.
OK, the docs are messy at best. I have huge issues fading in and out preloaded assets if I do not add 'false' to the instance of PreloadJS. But when I add it I completely lose the progress event ... what is it that's so deeply hidden in the docs, that I cannot find anything about this?
And has anyone got a complete example of HOW to actually and properly load an array (actually an object) of images without losing the progress event AND still have an asset that behaves as expected when adding it to the DOM and fade it in?
This was also posted in a question on GitHub.
The short answer is that loading with tags (setting the first param useXHR to false) doesn't support granular progress events because downloading images with tags doesn't give progress events in the browser.
You can still get progress events from the LoadQueue any time an image loads, but each image will just provide a single "complete" event.
#Lanny True for that part, but in my case I was also missing the 'true' in .getResult(), and the createObjectURL() for the image data:
…
var preloader = new createjs.LoadQueue();
…
…
function handleFileLoad ( e ) {
var item = e.item,
result = preloader.getResult(item.id, true),
blob_url = URL.createObjectURL( result );
…
So, that I was actually able to handle the image data as a blob … I couldn't find anything close to 'createObjectURL' in the docs. I guess that renders the docs 'not complete' at best …
I'm a complete newbie to both Lua, PICO-8, and coding in general. I'm having trouble with a function I want to put in my first program. The text is all placeholder, I will change it once I get the code right and comprehend it.
Basically, before the _init() I have a function ow() defined where I press a button and the program displays the text "ow." I put the function name in _update() so that it will update 30x/second to see if the button is pressed; however, this is making the "ow" appear 30 times a second (or however long the button is pressed) instead of appearing once when I initially press the button. How do I fix this? Thank you for your tolerance of a new coder's question in advance. Here's my code:
function ow()
if btn((X))
then print "ow"
--how do i make it do this
--only once?
end
end
function _init()
print "hello."
print "i have been waiting for you."
end
function _update()
ow()
end
function _draw()
end
You need a global variable to save previous status of the button.
function ow()
if btn((X)) then
if not button_was_pressed then
button_was_pressed = true
print "ow"
end
else
button_was_pressed = false
end
end
I'm trying to take a set of names with check boxes next to them and make a system so that you can check some of the names (mark them as "True") and click a button. It would then increment +1 the value next to the names of the people marked true.
Here is a link to a sample sheet:
https://docs.google.com/spreadsheets/d/1gf-BrXXR0cAYCn7bMkvvK65R290NXbP9D6aA68c06C8/edit?usp=sharing
If column A, row 2 (Tim's row) is marked true, I want to increment the value in column C, row 2 by one, so Tim would have a running total of tardies next to his name.
I hope this is do-able. Thanks!
(Now I know what you're trying to get)
In order to increment a value via the press of a button, as far as I know you have to use scripts (Tools -> Script Editor). Here's something I threw together:
// editCell takes the cell to edit and it's new value
function editCell(cellName, value) {
SpreadsheetApp.getActiveSheet().getRange(cellName).setValue(value);
}
// getCell takes the cell's value and returns it
function getCell(cellName) {
return SpreadsheetApp.getActiveSheet().getRange(cellName).getValue();
}
// plusOne adds one to the field supplied. It's linked to the button in the sheet
function plusOne() {
editCell("C2",getCell("C2")+1);
}
In order to make it work, you may need to change the targeted Cell (currently C2). You'll also need to create a drawing (Insert -> Drawing) which will act as the button you'll be able to press. Once inserted, click on the three dots on it and click on Link Script. Type in plusOne. When executing it the first time, it'll ask you to authenticate the use of scripts.
That should do the trick. I hope you have some understanding of Java Script though (to modify the code to your needs optimally).
Edit - Expandable version
So, to make every number behind a ticked field increase by one, you can use this version of the code:
// Adds one to every field within "AddArea" that has a tick in front of it. It's linked to the button in the sheet.
function plusOne() {
var ss = SpreadsheetApp.getActiveSheet();
var range = ss.getRange("AddArea");
var values = range.getValues();
var newValues = [];
for (var i = 0; i < range.getNumRows(); ++i) {
var row = values[i];
if(row[0]) {
newValues.push([true, row[1]+1]);
}
else {
newValues.push([false, row[1]]);
}
}
range.setValues(newValues);
}
You need to define a custom named area, named "AddArea" (Data -> Labeled Areas [or similar]), link the script to a button and allow the script to be run. This was hard but very fun to figure out.
Example Sheet for reference (updated)
Can be achieved with just, for example for C2:
=A2+C2
but you would need to turn on iterative calculation (File > Spreadsheet settings... > Calculation [Max. 1 is adequate]) and I would not really recommend that over a trigger with Google Apps Script.
I am using the IUP.GetParm dialog to do a search and replace prompt.
The dialog supports 3 buttons, the first two OK and Cancel close the prompt and return to the main program flow.
The third button can be tracked in the parm_action function, what I want to do is use the third button to skip the item and close the dialog, but I can't work out if this is possible.
I have asked this on the IUP mailing list but have not yet had a response.
function param_action(dialog,index)
if index == -4 then
bSkip = true
return 1
end
end
bSkip = false
bConfirm,strFromString,strToString,bSkip =
iup.GetParam("Search and Replace",
param_action,
fhGetTag(ptrRecord)..'-'..fhGetTag(ptr)..
' '..fhGetDisplayText(ptrRecord).." %t\n"..
"Replace: "..strBoxType.."\n"..
"With: "..strBoxType.."\n"..
"btn: %u[Ok,Cancel,Skip] \n"
, strFromString,strToString)
if bConfirm and not(bSkip) then
-- replace string
end
To make this function currently you have to press the Skip button and then the Ok button.
Just re-posting the answer from the IUP mailing list here:
Inside the call-back, when the 3rd button is pressed, set the dialog
attribute "status" to "1" and call the function iup.ExitLoop().