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Im trying to filter some type of data into 3, full history, sent, and received. Im using a useState hook, already using the set, but dont know where to use the first variable. And its printing me all the transactions.
im doing a statement verifying if the transaction inside the array is none(history, received(credit), or sent(debit, and placing that into an empty array.
And here im trying to use the variable and the hook with a component that i created.
idk if i have to put something different in the 'data' prop.
Thanks in advance :)
flatlist type should be TransactionDirection
<FlatList<TransactionDirection>>
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I need to check the response coderesponse_code I get from a device with the checksum method. In the description of the response codedesc_of_response, it says control characters are included, but control characters are not in the format that I can checksum. I'm not experienced in this, I'm just starting to learn. I would be very grateful if someone could help me.
How should I do the checksum process? Do I have to take the whole message into account when doing it? How should I deal with non-hexadecimal characters?
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I am new at programming and was wondering if you could give me some advice as to how to make a alphanumeric character press do something using C? I would like to program a different function for each character pressed. Can anyone help me?
In your window procedure, you can react to WM_KEYDOWN messages. Your window will receive such a message when the user starts pressing down a key. When the user lets go of the key, you will receive a WM_KEYUP message.
See this tutorial on window messages for the basics on how to handle window messages.
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Is the process of moving the state up (lifting the state) into a common ancestor component the same thing as state hoisting?
Yes, https://reactpatterns.js.org/docs/state-hoisting/
As the example above you are encouraged to lift state up, if two
components need to act on the same data or need to use the same
callback.
So you should create a common ancestor in this common ancestor and
then use the state to manage all the data and callbacks that children
will use in rendering as following.
Also this - https://reactjs.org/docs/lifting-state-up.html
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I have one component that takes quite a bit of data. I have an option to either create 12 props to send down to the child component OR create an object with 12 keys and send the object down by itself.
I honestly see no difference trying one or the other, so I'm trying to get some input as to which setup is better for performance.
Personally, I wouldn't worry about the performance aspect of it until it was obviously an issue. Pre-optimisation can be a bit like falling down the rabbit hole.
Without knowing more about the actual object, I would say that 1 big object (which has 12 keys) would be much to worry about.
Instead, I would pass the object down as one prop and then use destructuring as necessary to any further children.
i.e:
<ChildComponent largeObject={someObject} />
and in ChildComponent:
const { oneKey, twoKey, threeKey } = this.props.largeObject;
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How do i edit an XML nodes property?
I have tried using xmlNewProp, however, that does not overwrite the property. It just adds a new one.
So I was wondering if there is a way to either remove that property, or edit the propery.
Edit:
I understand that some people did not quite get what I was trying to do. Well, the thing was that I needed a way in C using libxml2 to update a nodes properties. I tried using xmlNewProp, however that did not work.
Someone suggested xmlSetProp, and that worked fine. My problem were that the documentation for lxml were huge, and it was difficult to locate the needed functions.
Based on libxml documentation, you can use xmlSetProp to set an attribute from a node.
http://xmlsoft.org/html/libxml-tree.html#xmlSetProp