clarify | Remove nodecore related stack trace noise | iOS library

I read this answer, which clarified a lot of things, but I'm still confused about how I should go about designing my primary key.

First off I want to clarify the idea of WCUs. I get that WCU is the write capacity of max 1kb per second. Does it mean that if writing a piece of data takes 0.25 seconds, I would need 4 of those to be billed 1 WCU? Or each time I write something it consumes 1 WCU, but I could also write X times within 1 second and still be billed 1 WCU?

Usage

I want to create a table that stores the form data for a set of gyms (95% will be waivers, the rest will be incidents reports). Most of the time, each forms will be accessed directly via its unique ID. I also want to query the forms by date, form, userId, etc..

We can assume an average of 50k forms per gym

Options

• First option is straight forward: having the formId be the partition key. What I don't like about this option is that scan operations will always filter out 90% of the data (i.e. the forms from other gyms), which isn't good for RCUs.

• Second option is that I would make the gymId the partition key, and add a sort key for the date, formId, userId. To implement this option I would need to know more about the implications of having 50k records on one partition key.

• Third option is to have one table per gyms and have the formId as partition key. This seems to be like the best option for now, but I don't really like the idea of having a a large number of tables doing the same thing in my account.

Is there another option? Which one of the three is better?

Edit: I'm assuming another option would be SimpleDB?

Hey to all in the forum

I use JSF Mojarra implementation, version JSF 2.2

I need desperately a help on this.

1. I have a snippet of my page.
2. I have a custom component "example_result.xhtml" used in the page.
3. I have my BackingBean.java Be aware please that this code is not the real code I made. If you run it, it will be very ugly maybe because I deleted all the css classes and I kept only the hot stuff I need to show you my problem.

Everything is inside 1 form.

The 5 "h:selectManyCheckbox" (in my code I have 8 or 9)

In the form I have 5 "h:selectManyCheckbox" which are using values in the "value" attribute for different cases (javaFrameworks2Values, javaFrameworks3Values,...), and the "f:selectItems" use arrays of "SelectItem" (javaFrameworksSelectItems2, javaFrameworksSelectItems3...) created for these different cases, just to make some examples for me to understand how all the selectOne and selectMany components work. The ideas for this, about different cases were taken from these links: "https://stackoverflow.com/tags/selectonemenu/info" and "https://mkyong.com/jsf2/jsf-2-checkboxes-example".

After I have 2 commandButtons

1 for submit, and 1 for reset the values.

Display the values

After I display the results of the values of the "h:selectManyCheckbox" via the "example_result.xhtml".

You can see the 4th "h:selectManyCheckbox" that is the only one different, because it has the attribute "required" with the attribute "requiredMessage". With it there is a "h:message" to display the validation error.

In the BackingBean (which is Spring Bean, but it works perfectly good - sorry I don't want ejbs 3.x), I have initialized:

1. The values of the SelectItems and
2. The values of the "value" attribute, where the values of the "h:selectManyCheckbox" will be stored to be displayed later. [The code is completely castrated, to make it readable snippet].

When the page is rendered, I select checkBoxes (e.g. the 2 last, because the 2 first are initials) from all the "h:selectManyCheckbox". When I say that select from all, I mean it. And from the 4th with the "required" attribute. I try in the buttons (see in the code) the "Effort 1", or "Effort 2", or "Effort 3" (in the "f:ajax" in the buttons) and the result outputs in the last part are displayed and updated like a candy. Without any problem. To achive this with the composite component I googled and tried a lot. But I made it.

Then it comes the time to try the 4th to see the validation error of the "required" attribute.

I select again from all as before, but not from all. NOT from the 4th "h:selectManyCheckbox" this time. I select nothing from the 4th "h:selectManyCheckbox" to ckeck the validator error message ("requiredMessage"). The result is: It displays the message of error (GOOD until now), BUT this time it does not update anything from the others "h:selectManyCheckbox" to the output results at the end, and it does not reset the values as well as it was doing before (when I selected from all and from the 4th as well).

I understand that it says: as long as in the form the 4th failed with validation error, all the other "h:selectManyCheckbox" will not update the output results (something like wanting to fail all the others too).

But what really happes here?

1. It does not give the values to the "h:selectManyCheckbox", to be updated to the output?
2. It gives the vales to the "h:selectManyCheckbox" normally, BUT it just not updates the output?

The other efforts in the "f:ajax" in the buttons, are just efforts maybe to solve the problem but in these cases they don't even display the error message in the 4th case and of cource they don't update the other output results as well (again). But no message error as well.

I don't know if the problem is clear to you. I can explain in the discussion better so I can clarify the situation better. [To be honnet it took me 1 and half hour to write all this thing]

Thanks a lot in advance

========== Snippet from my page ==========

Python issues: I need some help to figure it out why this code is printing 3 lines with a blank line between them. I want it to print every contact of a .txt starting with a specific letter. For example, if Z is = A, it will print:

Ariana

SSN:132664979

+1356974664

Abigail

SSN: 2658978133

+5765613197

..And so on with all contacts starting with "A". I don't know how to delete those blank spaces between each line with information.I want the code to print something like this:

Ariana
SSN:132664979
+1356974664
Abigail
SSN: 2658978133
+5765613197
...so on

I'd like to clarify that the .txt doesn't have any blank space between the data. So it is something the code is doing.

I am trying to use JOOQ code generation from JPA Entity. I have already created a dedicated maven module where the code will be generated which has dependency on a module containing all entities as well code generation plugin with of jooq.

To add more clarify on project structure, here are the modules:(The names are made up but the structure reflects the current project i am working on)

Can someone please explain what the code below "if not epoch%display n epoch" means? My understanding is that if epoch / display has NO remainder, then print the statement. Could someone clarify this for me?

Just a curious question in my mind and I thought of asking to Snowflake experts to clarify this question. We know that Snowflake default isolation level is read committed; I have one transaction let us A in which I am truncating data from Table T1 and Loading the Table T1 using transformed fresh data; at the same time I have another transaction say B is trying to read the data from Table T1 while getting this data truncated in transaction A; would I be able read the data from Table T1 in transaction B which it is still getting truncated in another transaction A.

My mind says yes; transaction B should be able to read it from Table T1 because transaction A still in progress and not yet committed.

I'm in the process of migrating a v9 app to v10, I was checking for input tags with the type attribute of number when I came across an input tag with multiple type attributes:-

I am wondering how I can use A-frame (https://aframe.io) to fade out my gltf model after around 3 seconds. I'm not sure exactly how I'd be able to do this. My current code is below:

Every time somebody asks a question about delete[] on here, there is always a pretty general "that's how C++ does it, use delete[]" kind of response. Coming from a vanilla C background what I don't understand is why there needs to be a different invocation at all.

With malloc()/free() your options are to get a pointer to a contiguous block of memory and to free a block of contiguous memory. Something in implementation land comes along and knows what size the block you allocated was based on the base address, for when you have to free it.

There is no function free_array(). I've seen some crazy theories on other questions tangentially related to this, such as calling delete ptr will only free the top of the array, not the whole array. Or the more correct, it is not defined by the implementation. And sure... if this was the first version of C++ and you made a weird design choice that makes sense. But why with $PRESENT_YEAR's standard of C++ has it not been overloaded???

It seems to be the only extra bit that C++ adds is going through the array and calling destructors, and I think maybe this is the crux of it, and it literally is using a separate function to save us a single runtime length lookup, or nullptr at end of the list in exchange for torturing every new C++ programmer or programmer who had a fuzzy day and forgot that there is a different reserve word.

Can someone please clarify once and for all if there is a reason besides "that's what the standard says and nobody questions it"?