How can I know if the old currency of the United States is usable?

I have American bills. I don't know if I can still use it or not. How can I find out?

$ 100 ticket$ 100 ticket

ip: number of usable addresses in a subnet

Currently, I am working with a company and we have been assigned the address space 200.1.1.0 / 24. From there, that subnet should be divided into 4 subnets of equal size. What I am trying to find out is what is the IP address of the third usable address in the second subnet.

libbitcoin: how to convert a python example with getinfo into a usable function?

From Antonopoulos's book I try to use example 3-3 on page 49 that uses a python skript called rpc_example.py To show the use of the JSON-RPC API:

    from bitcoin.rpc import RawProxy
    p = RawProxy()
    info = p.getinfo()
    print(info('blocks'))

in which $ python rpc_example.py should give 394875.


Of course getinfo It has been depricated and I would like to use another function, for example getblock.

I am not sure if I use it correctly or if I have an error in my syntax or if the following problem is due to something related to Python.


I already had some problems installing the library with pip install python-bitcoinlib and he also did pip3 install python-bitcoinlib because I wasn't sure if the problem I have now is related to encoding / decoding in python version 2.


My code is now

from bitcoin.rpc import RawProxy
p = RawProxy()
infoblock = p.getblock()
print(infoblock('difficulty'))

I should print the difficulty of the block, at least in my understanding (I am new to python and bitcoin).

I get the following error with python 2:

$ python BuchSkripte/49_rpc_example.py
Traceback (most recent call last):
File "BuchSkripte/49_rpc_example.py", line 2, in 
    p = RawProxy()
File "/usr/local/lib/python2.7/dist-packages/bitcoin/rpc.py", line 295, in __init__
    **kwargs)
File "/usr/local/lib/python2.7/dist-packages/bitcoin/rpc.py", line 159, 
in __init__
    if '#' in line:
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 5: ordinal not in range(128)

With python3 I get:

$ python3 BuchSkripte/49_rpc_example.py
Traceback (most recent call last):
  File "BuchSkripte/49_rpc_example.py", line 3, in 
    infoblock = p.getblock()
  File "/usr/local/lib/python3.5/dist-packages/bitcoin/rpc.py", line 306, in 
    f = lambda *args: self._call(name, *args)
  File "/usr/local/lib/python3.5/dist-packages/bitcoin/rpc.py", line 238, in _call
    raise JSONRPCError(response('error'))
bitcoin.rpc.JSONRPCError: {'code': -1, 'message': 'getblock "blockhash" ( verbosity )nnIf verbosity is 0, returns a string that is serialized, hex-encoded data for block 'hash'.nIf verbosity is 1, returns an Object with information about block .nIf verbosity is 2, returns an Object with information about block  and information about each transaction. nnArguments:n1. blockhash    (string, required) The block hashn2. verbosity    (numeric, optional, default=1) 0 for hex-encoded data, 1 for a json object, and 2 for json object with transaction datannResult (for verbosity = 0):n"data"             (string) A string that is serialized, hex-encoded data for block 'hash'.nnResult (for verbosity = 1):n{n  "hash" : "hash",     (string) the block hash (same as provided)n  "confirmations" : n,   (numeric) The number of confirmations, or -1 if the block is not on the main chainn  "size" : n,            (numeric) The block sizen  "strippedsize" : n,    (numeric) The block size excluding witness datan  "weight" : n           (numeric) The block weight as defined in BIP 141n  "height" : n,          (numeric) The block height or indexn  "version" : n,         (numeric) The block versionn  "versionHex" : "00000000", (string) The block version formatted in hexadecimaln  "merkleroot" : "xxxx", (string) The merkle rootn  "tx" : (               (array of string) The transaction idsn     "transactionid"     (string) The transaction idn     ,...n  ),n  "time" : ttt,          (numeric) The block time in seconds since epoch (Jan 1 1970 GMT)n  "mediantime" : ttt,    (numeric) The median block time in seconds since epoch (Jan 1 1970 GMT)n  "nonce" : n,           (numeric) The noncen  "bits" : "1d00ffff", (string) The bitsn  "difficulty" : x.xxx,  (numeric) The difficultyn  "chainwork" : "xxxx",  (string) Expected number of hashes required to produce the chain up to this block (in hex)n  "nTx" : n,             (numeric) The number of transactions in the block.n  "previousblockhash" : "hash",  (string) The hash of the previous blockn  "nextblockhash" : "hash"       (string) The hash of the next blockn}nnResult (for verbosity = 2):n{n  ...,                     Same output as verbosity = 1.n  "tx" : (               (array of Objects) The transactions in the format of the getrawtransaction RPC. Different from verbosity = 1 "tx" result.n         ,...n  ),n  ,...                     Same output as verbosity = 1.n}nnExamples:n> bitcoin-cli getblock "00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09"n> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getblock", "params": ("00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09") }' -H 'content-type: text/plain;' http://127.0.0.1:8332/n'}

Are there usable type definitions for the central entities of drupal + jsonapi?

Are there usable type definitions for the central entities of drupal + jsonapi?

Write a frontend application using nuxtjs / typescript / jsonapi … any experience / recommendations / etc. It will be very interesting

Thank you!

Semi-monophonic phrase of 24 words for Ledger Nano S usable in Trezor?

You can use them, but you must make sure that the hardware portfolios use the same address derivation routes. For the hardware manufacturing portfolios he mentioned (Trezor and Ledger), both use the BIP 39 / BIP 44 derivation routes, so they should work, especially in the case of Bitcoin. However, care must be taken with certain currencies (ETH or any other ERC-20, for example) when these portfolios do not use the same derivation routes.

usability – How to design the usable terms and conditions of the website?

It is not a response based on studies but on personal experiences, and some research that I did on this topic recently:

General aspects of the Terms and Conditions:

  • Legal document that establishes some rules b / n company and client / user.
  • Managing expectations and unifying the legal foundations of the business.
  • Treat the risks and protect the company.

Legal documents can also be used to increase trust.

Especially in electronic commerce is vital to the success of a company in which customers trust the company. A lot of money is spent on trust stamps, but customers can be scared if they look for the legal documents of the companies. Clearly understandable legal documents have the potential to increase confidence if clients feel they understand them.

Are the legal documents & # 39; standard & # 39; really a problem?

Probably not significant, we might think. According to my experience (based on analytical web data from several companies), less than 2% of users look at these legal documents (one). On the other hand a 1-2% increase in the conversion rate From an e-commerce site it is a very hard work. Small change but relatively high impact, I would say.

What can we do to obtain better legal documents?

  • Convincing the legal department or the lawyer to accept changes 🙂
  • Be friendly and say & # 39; Hello & # 39; to your customers, and express that you like them to be using your site – (yes, even in a legal document) [see Google example below]
  • Phrase the document in plain English (or in any language) in addition or even in lieu of legal jargon
  • Special attention is paid to the beginning of the document, as it is very likely that customers do not read everything.
  • Add a summary of each paragraph or at least highlight the key aspects (see the 500px example below)
  • Do not show legal documents in annoying iframes and / or very small print size

(one) Investigate how small users actually read: according to this research, less than 10% of the longer documents: http://www.useit.com/alertbox/percent-text-read.html

Examples

Google does not use legal jargon
(Source: ttp: //www.google.com/policies/terms/)

500px

500px adding a summary in English of each paragraph
(Source: http://500px.com/terms)

March 2013 edition (TED conversation link added):

I just came across an interesting TED talk about legal jargon in legal conversations to non-legal contracts, etc. and I wanted to share it here:

Edition of October 2015 (example of Zappier added):

He found another very good example of nice terms and conditions in Zapier, see the screenshot, but apparently it is no longer online (as of May 2019):
https://zapier.com/terms/
(Source: https://zapier.com/terms/)

Edition of May 2019 (examples of Revolut + Pinterest added):

Revolut, a new UK bank, rewrote and redesigned its terms and conditions, resulting in a drastically reduced amount of content. Now everything is in plain language and they use a question and answer format. They also wrote a blog post about the approach.
Pinterest's approach is similar to 500px and what Zappier used to have.

Screenshot of Revolut Terms and Conditions
enter the description of the image here

Is there any way to make the SD card usable again?

So let's say you're in the desert and you find a broken phone with a perfectly intact SD card …
How the usable encrypted SD card is made.
Real survival skills. trying to learn please help.

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tables – Is this a usable pattern? (Enterprise application UI)

I'm working on an application that requires a user to assign one or two years to a list of users (there are options available for two years, a user can be assigned to one or both years). And one user per year can be assigned a leader status. I am redesigning the current capacity, which had a lot of columns of check boxes and radio buttons to assign. This also meant that the user had to assign years for each row of users and not make any batch assignments. I wonder if the pattern that occurred to me makes a bit of sense or if there is some other pattern that works better.

I include a quick demo, but I will not give the instructions because I want to see how intuitive (or not) this is.

(The data and the design have been changed from the original, but the intended interaction remains the same).
enter the description of the image here