bitcoin | A real-time visualizer for the bitcoin blockchain | Blockchain library
kandi X-RAY | bitcoin Summary
kandi X-RAY | bitcoin Summary
A real-time visualizer for the bitcoin blockchain. I think a lot of people hear something about Bitcoin and wonder what it really is. I mean: it's not physically limited, it's not verified by a trusted and independent source--so what is it? How is the supply limited? Who verifies that Frank sent money to Sally?. The best way to understand it is to visualize the data involved with some understanding attached. Many computers expend processing power to validate blocks of transactions. The verification of each block includes, by cryptographic hash, the work of all previous blocks. The genious of this is that as the chain of blocks grows, the difficutly of later manipulation grows too. Grows exponentially, as it turns out. This is what people talk about when they say block chain. A confirmed block is forever, and the block chain is the history of all confirmed blocks every agreed on by the community of nodes in the bitcoin network. This visualization shows the bitcoin blockchain. Recently confirmed blocks are at the top and older ones are at the bottom. Each rectangle is a single block of many transactions. Bitcoin processes about one block every 10 minutes. The width of the block represents the number of transactions. The color represents how close it is to capacity in byte size. Blocks are limited by the bitcoin protocol to 1mb, and many blocks are already very close to that limit, as you can see.
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QUESTION
I have bitcoin historical data. I split the "DATE" Colum as "year month days and hour" because I wanted to sort data based on hours["AS it is hourly base data"]. the data goes up to 2021-12 ie Decmber["the dates goes from 1 to 30 every month"]. I want to sort this data further as:- "2019-Jan, 2020-Jan 20201-Jan" then "2019-Feb,2020-Feb, 2021-Feb" and soon on
Year Month DAy Hour open high low close 2019 1 1 0 3700.05 3725.58 3698.83 3715.09 2019 2 1 0 3700.05 3725.58 3698.83 3715.09 2019 3 1 0 3700.05 3725.58 3698.83 3715.09 2019 4 1 0 3700.05 3725.58 3698.83 3715.09 2019 5 1 0 3700.05 3725.58 3698.83 3715.09can this be done by saying I have split the "DATE" column? if YES please any suggestion on how this can be achieved
The original "DATE" colum was as follows :- 2019-01-01T00:00:00Z
...ANSWER
Answered 2021-Jun-15 at 18:58You can first sort with respect to Month and then Year:
QUESTION
I have a JSON payload that looks like this:
...ANSWER
Answered 2021-Jun-14 at 06:38The approach would be simple. We take each key of json object and we replace its digit part with empty string then copy the data of old key to new key and delete the old key.
QUESTION
I have the following code to which I tried to apply generics.
...ANSWER
Answered 2021-Jun-13 at 10:57You need to do things slightly different when you're defining a struct, and when you're instantiating a struct.
When you write:
QUESTION
I created a counter section where it goes from 0 to a specific number. However, all three counterts start at the same time.
Is there any possibilities that first counter 1 counts up, as soon as it is finished counter 2 counts up and so on. Respectively every counter counts up one by one.
Here I created a Pen project.
...ANSWER
Answered 2021-Jun-11 at 09:30this seem to work
QUESTION
So I need to download the images of every coin on the list on CoinGecko, so I wrote the following code:
...ANSWER
Answered 2021-Jun-10 at 11:05I believe you could achieve this very easily using string slicing:
QUESTION
I am attempting to read an incoming stream of data from UART, and trying to add each character received to an array of char until characters \r and \n are received (in that order).
I have written a function (char read_uart()) to wait for then return when a single character is received. This function properly receives and returns the single character, as it should.
On top of this function, I have tried creating another which is supposed to read every character and add them to an array until the termination combination is received. This is it:
...ANSWER
Answered 2021-Jun-08 at 15:57There are two issues here.
First, what you're passing to the function isn't what it's expecting. &message has type char (*)[4096], i.e. a pointer to an array of size 4096 of char. The function meanwhile is expecting a char *[4096], i.e. an array of size 4096 of char *. This is a type mismatch.
The second is that on this line:
QUESTION
Lets say i created an erc20 token. Now i want to make a smart contract that sends 1 coin to a user if they have X coins on another blockchain like bitcoin. Would that work? Can i read data from other blockchains using a cardano/ethereum/any other smart contract?
...ANSWER
Answered 2021-Jun-06 at 21:42There are some bridge applications that allow you to perform cross-chain operations (mostly run by exchanges). But these are operated on a different layer, unrelated to smart contracts.
What you're asking is not possible if you want to stick strictly to smart contracts.
However, you can use the oracle pattern. Create an off-chain app (the oracle) that listens to transactions from your contract to a specific address. Each transaction (from your contract to the target address) will trigger an action in the off-chain app - e.g. reading Bitcoin data. The oracle then sends another transaction to your smart contract, passing it the off-chain data.
QUESTION
Ive Been Trying to get an element from a page that Ive clicked on to get into the next page with soup.find_all. The problem is that it gives me the elements of the first page. Thanks in Advance.
The code:
...ANSWER
Answered 2021-Jun-06 at 08:45You have to increase the delay after clicking the next_page.click() before content = driver.page_source.encode('utf-8').strip() to make the page load a next page data.
It's not recommended to use hardcoded sleep.
Some better way to do it would to get data presented on the previous page and then use some kind of expected conditions to wait until the previous data no more presented.
QUESTION
Ive Been Trying to Click a Button on https://blockchain.coinmarketcap.com/chain/bitcoin But With No Success (Shown in photo below). I Couldn't even get the element I wanted to click. If someone can help me find the element and how to click it, it would be very helpful to me. Thanks in advance. The Button Im trying to click is the page 2 button
...ANSWER
Answered 2021-Jun-05 at 21:28First you need to wait until the element is presented on the page, then scroll to it and then click on it.
I tried to do it as following:
QUESTION
I saw this syntax in the python implementation of bitcoin over here.
https://github.com/samrushing/caesure/blob/master/caesure/bitcoin.py
I have never seen this syntax before, can someone explain it to me or show me somewhere in the documentation where I can understand it?
...ANSWER
Answered 2021-Jun-04 at 08:38In Python you can assign functions to variables.
fout.write is a function, so in this example, D is assigned to that function.
D = fout.write
In this line
D ('hash: %s\n' % (hexify (dhash (self.render())),)), you are calling the function D, that is, fout.write. It would be the same as:
fout.write('hash: %s\n' % (hexify (dhash (self.render())),))
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