Javascript field can't use function defined in the shared script ?

stary -

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Aug 10, 2021, 11:42:11 AM8/10/21

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I have defined this sub function inside the shared script tab

however when i trying to call it from a javascript field it shows undefined error Screenshot_2021-08-10-23-26-36-880_com.luckydroid.droidbase.jpg

what should i do?

should i create a github repository or is there any other continent ways to add a user defined javascript library ?

Beth Dixon

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Aug 10, 2021, 11:50:31 AM8/10/21

to stary -, mementodatabase

Looks like you are missing a ) at the end of your script.

Beth

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Beth Dixon

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Aug 10, 2021, 11:51:12 AM8/10/21

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Ps...and looks like you haven't added JavaScript libraries.

stary -

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Aug 10, 2021, 11:57:32 AM8/10/21

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yes, there's no add shared script options inside the add library

this is my shared script

From: Beth Dixon <beth.ea...@gmail.com>
Sent: Tuesday, August 10, 2021 11:50:56 PM
To: stary - <sta...@live.com>
Cc: mementodatabase <memento...@googlegroups.com>
Subject: Re: Javascript field can't use function defined in the shared script ?

Beth Dixon

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Aug 10, 2021, 1:29:06 PM8/10/21

to stary -, mementodatabase

Have you selected Add JavaScript Libraries?? I don't see that you have done that. See attached screenshot.

Screenshot_20210810-132554_Gmail.jpg

Beth Dixon

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Aug 10, 2021, 2:12:53 PM8/10/21

to stary -, mementodatabase

Just to clarify, go to edit of your library, scroll down to Add javascript libraries, tap on that, then select moment.min.js

Beth

stary -

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Aug 10, 2021, 2:40:28 PM8/10/21

to Beth Dixon, mementodatabase

I have added the moment.min

but it still says sub(my defined function in shared script ) not found

From: Beth Dixon <beth.ea...@gmail.com>
Sent: Wednesday, August 11, 2021, 02:12
To: stary -
Cc: mementodatabase

Er Mo

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Aug 10, 2021, 3:15:48 PM8/10/21

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Hallo

Es gibt da 2 Möglichkeiten . Sie verwenden eine Trigger oder Auslöser . Da gebt es eine Möglickeit ein Skript für diese Bibliothek zu hinterlegen , die von den Sjripten aufgerufen werden kann . Oder sie möchten ein Skript für mehrer Bibliotheken zur verfügung haben . Da kann man in GitHub gehen oder auf einer Webseiten ablegen .

Hello
There are two options. You are using a trigger or trigger. There is a possibility to store a script for this library, which can be called by the scripts. Or you would like to have a script available for several libraries. You can go to GitHub or put it on a website.

Beth Dixon

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Aug 10, 2021, 3:46:36 PM8/10/21

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You are missing a bracket in your code.

Try this...

sub(field("link"),("bullet"))

Bill might be able to help you better than I.

But try the above...

Beth

processed.jpeg

Bill Crews

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Aug 10, 2021, 4:35:09 PM8/10/21

to stary -, Beth Dixon, mementodatabase

We know only what we can glean ... That there is a field named "name" and a value "bullet" that you want to go into that field. If it's a shared script, why does it call a global function field()? There is no such global function. There must be a "current entry" for that, and shared scripts (like most other things) don't work for JavaScript fields.

If you tell us more, we can be of more help, but all I can do is guess that the following is what you want...

It must be a trigger script or an action script located in an entry. This enables the entry() global function to work, so there is a "current" entry.

So, entry().set("name", "bullet); is all the script you need, if your objective is to set that field's value to "button". If you're wanting to do something else, you might consider telling what that is.

To view this discussion on the web visit https://groups.google.com/d/msgid/mementodatabase/OSBPR01MB2597AEE2D6E84A3C28483533E3F79%40OSBPR01MB2597.jpnprd01.prod.outlook.com.

Screenshot_2021-08-10-23-26-36-880_com.luckydroid.droidbase.jpg

processed.jpeg

Bill Crews

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Aug 10, 2021, 5:17:38 PM8/10/21

to stary -, Beth Dixon, mementodatabase

If you want to extend Memento with JavaScript, I suggest you read the wiki, so you can learn how to do it. If you want to use the simplest scripts, you could try using a JavaScript field, but it doesn't have fancy global functions like set() or link() or libByName(), but it does have simple global functions like field();

If you decide a usually simple JavaScript field is for you, read this page...

JavaScript field, or...

https://wiki.mementodatabase.com/index.php/JavaScript_field

If a fancy, probably longer script is what you feel you need, read this page, for starters, since all the other stuff is based on: Memento Javascript Library, or...

https://wiki.mementodatabase.com/index.php/Memento_JavaScript_Library

If you're going for the fancier stuff & have read the MJL page, you can then branch out into various directions, depending on what you want to do next...

* For a button in the libraries list screen or a button in an edit view card (assuming mobile Memento): Actions, or...

https://wiki.mementodatabase.com/index.php/Actions

* For a script to run automatically when certain things happen in certain circumstances: Triggers, or...

https://wiki.mementodatabase.com/index.php/Triggers, or...

...and...

Trigger examples: Trigger examples, or...

https://wiki.mementodatabase.com/index.php/Trigger_examples

The rest of the MJL-based JavaScript pages are for other, less-often-used scripts...

https://wiki.mementodatabase.com/index.php/Data_Sources, or...

https://wiki.mementodatabase.com/index.php/How:Write_scripts_in_JavaScript_for_Memento, or...

https://wiki.mementodatabase.com/index.php/Tips:Using_JavaScript_in_Memento

And once you do that, if you still have questions or comments, please post here in the forum.

Bill Crews

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Aug 10, 2021, 5:25:16 PM8/10/21

to stary -, Beth Dixon, mementodatabase

CORRECTION: Actually, for a shared function definition, it should be...

function sub(fieldname, fieldvalue) {

entry().set(fieldName, fieldValue);

}

Then call that in a trigger, action, or whatever with this...

sub("name", "bullet");

On Tue, Aug 10, 2021, 16:34 Bill Crews <bill....@gmail.com> wrote:

stary -

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Aug 11, 2021, 4:57:54 AM8/11/21

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Thanks so much for replying.

Actually what i want to do is extend the Entry Class to add a method that can find any entry it links to matches a specific name.

For example :

A entry named A1 link to B1 and B2

then B1 link to C1 and C2

so this is like a binary tree structure with 3 layers from root A1 to leaf C1 or C2.

Then, since every node is Entry type, I want to extend the Entry Class to add a extra method "sub" to search if any child node matches the required name.

eg:

A1.sub("B1") should return B1 note as an entry type because B1's field "name" is "B1"

or in another word:

A1.field("link").find(x=>x.field("name")=="B1")

similarly:

A1.sub("B1").sub("C2") should return C2 as an entry type

I have successfully wrote the sub as a global function by following definitions:

(see picture below) Screenshot_2021-08-11-16-49-15-508_com.android.browser.jpg

it can be called like sub(A1,"B1") and works fine.

but what I actually wanna do is to add it into the Entry class as a method so i can write a clear and beautiful chain as A1.sub("B1").sub("C2").sub("D3)...... instead of ugly and hard to read nested function like sub(sub(sub(A1,"B1"),"C2"),D3)......

Bill Crews

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Aug 11, 2021, 12:27:05 PM8/11/21

to stary -, mementodatabase

Ah! Excellent! By providing this information, someone may, at least to a limited extent, be able to help you here. Trees within relational databases have always been hard to represent, and it's been requested & discussed many times in the forum for Memento.

I didn't have any inkling that you're as conversant in JS as you are. Regardless of the outcome, we can have a much more efficient conversation now.

By the way, like some other JS features, the this keyword, though it works in the desktop edition of Memento, may not work in the mobile edition that has an older version of JS built into it. The other troublesome keywords I'm aware of are let, const, and for...of, so if you want your scripts to run on mobile devices, you'll need to use entry(), var, and for...in instead.

I'm about to spend some time working to help you, but I'll have to take a mid-day break now. In the meantime, I suggest reading at the following link. I haven't tried prototyping (like subclassing) in JS, but that's where it is described, and if it's possible in Memento, I think that page and it's nearby friends may be where how to do it is described...

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain

I am extremely interested in this subject! I hope you don't drop it and might share with us what you may learn. I'll be back after my mid-day break...

To view this discussion on the web visit https://groups.google.com/d/msgid/mementodatabase/a85621f2-dc6b-472b-89ad-40c00dd74530n%40googlegroups.com.

Er Mo

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Aug 11, 2021, 3:30:44 PM8/11/21

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Hallo

Wenn sie in einer Bibliothek in Memento ein ein Skript mehrmals verwenden wollen schreiben sie es unter "Shared " . Zum Aufrufen von den Skript muss der Name unter den das Skript gespeichert ist, angegeben werden . Ist nicht wie bei einer Funktion .

Hello
If you want to use a script several times in a library in Memento, write it under "Shared". To call the script, the name under which the script is saved must be specified. It's not like a function.

Bill Crews

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Aug 11, 2021, 6:30:52 PM8/11/21

to stary -, mementodatabase

If nothing else works, I think Treeline or maybe Treepad are probably the best of the fielded tree apps.

Bill Crews

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Aug 11, 2021, 6:32:58 PM8/11/21

to stary -, mementodatabase

Even if this would work, it would need a pair of parentheses, so...

var e = entry();

e.prototype.sub = function() (

}

Call it with e.sub()

On Wed, Aug 11, 2021, 6:05 PM Bill Crews <bill....@gmail.com> wrote:

If I understand correctly, you should be able to use something like the following...

In a Shared script:
var e = entry();
e.prototype.sub = function() (
<Your code here>
}

I'm not sure, but I think the => operator isn't there in the Memento version of JavaScript.

stary -

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Aug 11, 2021, 11:28:30 PM8/11/21

to Bill Crews, mementodatabase

Yeah, I do ttied these before.

I think e.prototype is undefined for some reason .

From: Bill Crews <bill....@gmail.com>
Sent: Thursday, August 12, 2021 6:32:40 AM

stary -

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Aug 11, 2021, 11:49:47 PM8/11/21

to Bill Crews, mementodatabase

As you can see , I can successfully acquired linked object by my sub function

however the prototype of this object has the same error: undefined

here is my library :

http://libs.mobi/s/PCfUZEpeY

you may test with it.

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To: Bill Crews
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