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QUESTION
I don't know how to compare counted elements inside of ist and osv columns.
...ANSWER
Answered 2022-Feb-23 at 09:59use this
QUESTION
I have a sidebar nav which collapses to make way for more content in a flex layout. When the user clicks to collapse the nav the content area div .ca
expands to fill the space and the flex layout reflows using media queries.
I have applied a CSS transition to each moving element but the .ca
div jumps when the nav is opened and closed. This seems to be related to the widths of the units in the flex layout – .songgrid-unit
.
The unit has a width
value in px
but the media queries set a min-width
value in %
to override this, so as to avoid large empty spaces between break points:
html:
...ANSWER
Answered 2021-Aug-12 at 22:42It's hard to tell because the code on the site you linked is a bit different from what you posted here. But it seems to me like the .ca
div isn't actually jumping, it just looks like it is because as the items inside the grid change in size the number of items per row changes. The jump happens when the items either take up more space so that one fewer can fit in a row, or take up less space so one more can fit per row.
I played with the code you posted here a bit just to demonstrate what I think is happening. I hid the nav and added some outlines around the songgrid-container & individual songgrid items, and then I slowed down the transition a bit. So you can press the blue box and see what the transition looks like in slow motion. It looks like the widths are all transitioning fine, it just jumps when the layout inevitably changes.
Unfortunately I don't have a super easy solution to this, it's not really something you can control with a basic CSS transition. But maybe look at a library like this: https://isotope.metafizzy.co/
I don't actually think the media queries have anything to do with it, but I may also just be completely misunderstanding the effect you are seeing!
QUESTION
I have written some lines of code in R Shiny and would like to use variables a
(surface area) and v
(volume) which are numeric vectors containing 9 values. These variables are calculated using a constant size vector d
. An if condition determines which formula to execute based on user selection of particle shape from a dropdown menu. The variables a
and v
are used in the subsequent steps to create a dataframe, a plot, and a graph.
I am facing 2 problems with my code currently.
The variables
a
andv
are not being calculated which is resulting in an error in the later steps because I am not able to create dataframes which usea
andv
.The dataframes I have coded within the
reactive()
function, which are intended to be variable as the values will change based on user selection, are not being created and I cannot figure out why.
Below is the code. I am fairly new to R so any help would be highly appreciated.
...ANSWER
Answered 2021-Jun-23 at 21:00There are a few things to consider:
a
andv
are reactive values and they must be called like a function, for examplea()
.v
is called inside the reactive definingv
, and because there's no object declared in any environment with that name that would result in an error or in case that it exists it won't have the desired value.- The vector of choices defined in the second
selectInput
does not match the ones inside the if statements. (be ware of case sensitiveness)
Code:
QUESTION
I've a many2many field between res_partner and ir_attachement defined that way :
...ANSWER
Answered 2020-Aug-20 at 17:59I think the easiest solution is to create three fields in your class and make sure you define domain
QUESTION
I am hoping someone might be able to help me with writing a COBOL MF Net Express 5.1 compile command in Powershell. I have the command as it was used in the original batch script. I am currently working on reworking this in Powershell as a build script.
...ANSWER
Answered 2020-Apr-15 at 16:18Calling external exe's/cmd's via PowerShell requires specific attention. It is a well-documented thing.
See these details from Microsoft and others: ---
PowerShell: Running Executables
- The Call Operator &
QUESTION
ANSWER
Answered 2020-Mar-22 at 02:51I think you might want to refactor your code a bit and wrap your querySelector
's in an onload event listener because (at least for me) the variables are all undefined. You should wait until the content (class names etc.) are already rendered onto the DOM.
Then you need to wrap your point check in a function that gets called at the end of your point assignment. Otherwise the check will only be called when the JS file initially loads. I put the point evaluation in the evalPoints
function and added it at the end of the point assignment function so that so the check gets run every time you add a point.
You also don't appear to have resetScore
declared anywhere so I added that as well.
QUESTION
For example, I have a host OS (say, Ubuntu) with KVM enabled. I start a virtual machine with QEMU to run a guest OS (say, CentOS). It is said that to the host OS, this VM is just a process. So in the host's point of view, it handles page fault as usual (e.g., allocate page frame as needed, swap pages based on active/inactive lists if necessary).
Here is the question and my understanding. Within the guest OS, as it's still a full-fledged OS, I assume it still has all mechanisms handling virtual memory. It sees some virtualized physical memory provided by QEMU. By virtualized physical memory I mean the guest OS doesn't know it is in a VM, and still works as it would on a real physical machine, but what it has are indeed an abstraction given by QEMU. So even if a page frame is allocated to it, if that's not in guest's page table, the guest OS will still trigger a page fault and then map some page to the frame. What's worse, there may be a double page fault, where the guest first allocate some page frames upon page fault, which triggers page fault at host OS.
However, I also heard something like shallow (or shadow) page table which seems could optimize this unnecessary double page fault and double page table issue. I also looked at some other kernel implementation, specifically unikernels, e.g., OSv, IncludeOS, etc. I didn't find anything related to page fault and page table mechanisms. I did see some symbols like page_fault_handler
but not as huge as what I saw in Linux kernel code. It seems memory management is not a big deal in these unikernel implementations. So I assume QEMU/KVM and some Intel's virtualization technologies have already handled that.
Any ideas in this topic? Or if you have some good references/papers/resources to this problem, or some hints would be very helpful.
...ANSWER
Answered 2020-Mar-15 at 20:20There are two ways for QEMU/KVM to support guest physical memory: EPT and shadow page tables. (EPT is an Intel-defined mechanism. Other processors support something similar, which I won't talk about here.)
EPT stands for Extended Page Tables. It is a second level of paging supported by the CPU in addition to the regular processor page tables. While running in a VM, the regular page tables are used to translate Guest Virtual Addresses into Guest Physical Addresses, while the EPT tables are used to translate Guest Physical Addresses into Host Physical Addresses. This double-level translation is performed for every memory access within the guest. (The processor TLBs hide most of the cost.) EPT tables are managed by the VMM while the regular page tables are managed by the guest. If a page is not present in the guest page tables, it causes a page fault within the guest, exactly as you have described. If a page is present in the guest page tables but not present in the EPT, it causes an EPT violation VM exit, so the VMM can handle the missing page.
Shadow page tables are used when EPT is not available. Shadow page tables are a copy of the guest page tables which incorporate both the GVA to GPA and GPA to HPA mappings within a single set of page tables. When a page fault occurs, it always causes a VM exit. The VMM checks whether the missing page is mapped in the guest page tables. If it is not, then the VMM injects the page fault into the guest for it to handle. If the page is mapped in the guest page tables, then the VMM handles the fault as it would for an EPT violation. Efficient management of shadow page tables across multiple processes within the guest can be very complex.
EPT is both simpler to implement and has far better performance for most workloads, because page faults are generated directly to the guest OS, which is generally where they need to be handled. The use of shadow page tables requires a VM exit for every page fault. However, shadow page tables may have better performance for a few specific workloads that cause very few page faults.
QUESTION
I have implemented a plugin for my Dynamics CRM which is firing on Update message for incident entity. Also I have a web service for external users which can update just two attributes of incident entity from outside.
The problem is while external users use the web service to update entity, the plugin will fire also. I want to bind the plugin going to be fired just inside CRM when incident entity changed and prevent it firing by outside requests.
I checked below conditions in my plugin for preventing infinite loop and it works but not works for preventing firing by outside update requests.
...ANSWER
Answered 2020-Mar-04 at 02:54The plugin executes in every server transaction & it gets triggered which is the expected behavior (that's the whole purpose).
You may use some other flag (additional attribute or any service account) which only get updated/used by outside integration, in that case you can check in execution context/target entity and ignore the further execution.
For external integration - you should create an Application user (non-interactive service account). Read more
QUESTION
I am uncertain regarding what child_of
does after reading the docs and the use of child_of
operator over using in
operator for filtering
Odoo v10 domain docs can be found here which states the following for child_of
ANSWER
Answered 2020-Jan-02 at 12:29Basically child_of
functionality is provided by odoo, not python.
But to understand it you must need to knowledge of parent
, 'child` relationship in database concept.
If any of your tables are using a self join like below example.
_name = 'my.table'
parent_id = fields.Many2one('my.table', string='Parent Id')
In the above case, your model has connected itself. In this type of cases in Odoo, you can use child_of
operator in the domain.
So, it will search in database like parent_id =
.
For in
domain,
You can pass the list of data which you need to search in id
field. It similar to any database in
operator.
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