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QUESTION
I would like to update the chatList
, when the user presses a button the method newChat()
is called and an API is invoked. This API sends back all the old chats + the new chats. But when I call this I get an error that TypeError: chatList.map is not a function
. Is the error because I am adding back the complete chats?
How can I make chatList update itself when I pressed the button, I tried something once with the UseEffect, however this did not work either.
So how can I make that when the button is pressed the old and the new chats are displayed in the list.
...ANSWER
Answered 2021-May-29 at 18:28First guess would be that chatList is not considered an array anymore.
Maybe adding the following before the chatList.map would help you see what's going wrong
QUESTION
Hi I have data in my MYSQL which I am trying to sort by Months and Year together and display it in new HTML table every time sort by Year and months.
trying to do like this -
...ANSWER
Answered 2021-May-03 at 20:11do comparison between months not years and get month from DB also break line and add new line only when month change
Update query
QUESTION
Im currently writing a Contact Manager for our Exchange Online Tenant in C# using the Powershell-Commands and Runspaces from "System.Management.Automation" and "System.Management.Automation.Runspaces" respectively. Its working fine for adding Contacts to the GAL. But im stuck at editing Contacts.
I need to get the Contact Details with the Powershell Commands. The code i can execute looks like this:
...ANSWER
Answered 2021-Mar-09 at 18:33Help me understand why you need to pass your Contact object to Format-Table
. This is basically destroying the Contact Object itself. Format-Table is just a way to layout a PSObject to the PS Host, once you pass an object to this function said object will lose all its properties and methods.
I'll show you an example of what I mean with an AD User Object.
Without Format-Table:
QUESTION
I have a table with a column 'TIMESTAMP' of data type VARCHAR:
...ANSWER
Answered 2021-Feb-18 at 16:19The only part that disagrees with MySQL's date literal format is the 'Z'
at the end.
QUESTION
In callback function I can print the value in consoleLog. But, can not get that value in computed property. It shows undefined. Completely stack here.
...ANSWER
Answered 2021-Jan-22 at 00:13Could you try with:
QUESTION
I want to copy a part of my sheet to another sheet when in column "M" an "X" has been written:
...ANSWER
Answered 2021-Jan-05 at 12:07The error is because Cells(lastrow, 1)
does not take as parent the ActiveSheet "Erledigt", but the worksheet, in which the event code resides. So the Range
and the Cells
have different parents... To have the same parent worksheet, it should be indicated explicitly, by rewriting this part:
Range(Cells(lastrow, 1), Cells(lastrow, 13)).Select
to this:
QUESTION
I'm learning Vue and set myself the task to create a to do list. To make it prettier, I wanted to style my checkboxes and used this link as a basis.
It works mostly fine: I can click on undone tasks to make them done and the other way round. However, if I click on a done task, the next done task (if there is any) gets the styling of an undone task (while correctly staying in the done department). It looks like this:
I can't figure out why this is happening. Can you? Thanks for any help!
Here is my code:
...ANSWER
Answered 2020-Nov-20 at 23:56You're getting bitten by a combination of factors:
- You aren't keying the items correctly. Keying by index in the list does not uniquely identify that item because the item indices will change when they get moved around.
- The
checked
attribute only determines the initial checked state of the checkbox. Adding or removing this attribute has no effect on the checkbox after it is already created.
Vue's DOM patching algorithm tries to re-use existing DOM nodes whenever possible. When items get moved around, Vue will add or remove the checked
attribute from the checkbox at the new index, which will not change the checked state of the checkbox.
There are 2 ways to fix it:
(Recommended) Use a key which always uniquely identifies the given item, even when it is moved around in the list. The
v-for
index won't work because the index will change. By doing this, Vue will preserve thethat corresponds to that item, thus preserving its checked state.
For some deliberate reason, Vue does not allow using the object instance as the key, which would be perfect in this situation, so you have to maintain a key for each item manually; a
Symbol
will work.
QUESTION
I have big enough
...ANSWER
Answered 2020-Nov-06 at 10:45Use memcpy
. You might be tempted to use reinterpret_cast
, but then you can easily end up with undefined behavior (for instance due to alignment issues). Also, pass a vector by a const reference:
QUESTION
I trying to decode a hex string in python.
...ANSWER
Answered 2020-Aug-10 at 08:24Your data is encoded as UTF-8, which means that you sometimes have to look at more than one byte to get one character. The easiest way to do this is probably to decode your string into a sequence of bytes, and then decode those bytes into a string. Python has built-in features for both:
value = bytes.fromhex("54 C3 BC").decode("utf-8")
QUESTION
ANSWER
Answered 2020-Jul-06 at 09:30Adding the id
in var object
fixed the issue.
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