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Smartın Altyapısını Paylaşıyorum. Tarih 2020.12.25 23.06 Projeyi Yükleyip open.jsonu doldurunuz.
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Lines of Code : 27License : Non-SPDX (Apache License 2.0)
Copydef smart_case(pred_fn_pairs, default=None, exclusive=False, name="smart_case"):
"""Like tf.case, except attempts to statically evaluate predicates.
If any predicate in `pred_fn_pairs` is a bool or has a constant value, the
associated callable private void deployContract() throws Exception{
Web3j web3j = Web3j.build(new HttpService("https://rinkeby.infura.io/"));
Credentials credentials =
WalletUtils.loadCredentials(
"",
"/path/to Community Discussions
Trending Discussions on Smart
QUESTION
I want to have my reference counted C++ object also managed in Lua callbacks: when it is held by a Lua variable, increase its refcount; and when the Lua variable is destroyed, release one refcount. It seems the releasing side can be automatically performed by __gc meta-method, but how to implement the increasing side?
Is it proper&enough to just increase refcount every time before adding the object to Lua stack?
Or maybe I should new a smart pointer object, use it everywhere in Lua C function, then delete it in __gc meta-method? This seems ugly as if something wrong with the Lua execution and the __gc is not called, the newed smart pointer object will be leaked, and the refcounted object it is referring would have leak one count.
In Perl that I'm more familiar with, this can be achieved by increase refcount at OUTPUT section of XS Map, and decrease refcount at destroyer.
ANSWER
Answered 2021-Jun-10 at 19:23I assume you have implemented two Lua functions in C: inc_ref_count(obj) and dec_ref_count(obj)
QUESTION
I'm working on a Chrome extension that integrates with a website. My users can do actions on this website when they are logged in to it.
I have a Socket.IO server that delivers commands to my Chrome extension. Once a command arrived, the extension invokes a local function from the host website. Then, the host website, which has an authenticated active session with its own API, will invoke some update/insert call.
I recently realized a potential security issue, which is - if anyone spoofs my server address on my extension clients organization, he can easily abuse it to send his own parameters on behalf of my server (image 2).
Is there any smart way to ensure my client communicates with the real server and not an imposter?
...ANSWER
Answered 2021-Jun-15 at 16:49Use HTTPS secured connection.
This is one of the features of HTTPS (SSL/TLS) - it can prevent a MITM attack and prevent the destination server from being impersonated.
QUESTION
I had do some transaction in Binance Smart Chain in Binance-Peg BUSD-T and it worked successfully. But after 5 transactions. I face to a problem that said Returned error: transaction underpriced ! This is my code:
ANSWER
Answered 2021-Jun-14 at 16:32The "transaction underpriced" error occurs, when you're trying to replace a transaction and the replacing gas price is too low.
web3.eth.getTransactionCount() only returns the amount of mined transactions. But you can have N (not just one) of transactions that are waiting to be mined with already higher nonce.
Example:
- You have submitted 4 transactions - nonces 1, 2, 3, and 4.
- Transactions 1 and 2 are successfully mined.
getTransactionCount()returns 2- When you're trying to submit another tx with nonce 3 or 4, it's trying to replace the already existing transactions.
Solution:
Use even higher gas price if you want to replace the existing transaction.
Or if you want to submit a new transaction (and not replace the previous), use higher nonce (sum of "successfully mined" + "waiting to be mined" + 1) that your address haven't used.
QUESTION
i do have a list of timeseries and I'd like to create a matrix out of it. My first idea was to seperate the list with dplyr by "filter" and merge the list of list but i am not sure if this is really smart.
Would be great if you could give me an input how to tackle this issue!
...ANSWER
Answered 2021-Jun-15 at 10:30A Solution using the tidyverse:
QUESTION
For a project for my study I am working on a React Native project, but I am stuck. I want to give the prop 'Score' to Card.js and based on that score a color has to be defined; 'transparancyColor'. Currently, the props are passed from Home.js to Card.js and the transparencyColor is defined there. Is this a smart way, or do I have to do this at Home.js? And how?
The code of Card.js looks as follows:
...ANSWER
Answered 2021-Jun-15 at 09:10Regarding the code structure question, it's fine, especially initially, to pass props down one or two levels.
In terms of code, something like that (note the convention is to start variable names with lowercase):
QUESTION
Sorting data from huge lists with two levels of keys is helpful for interpreting dataset and calling by couple or one level of keys some slice of data, especially when creating plots.
I use a very naive and, I guess, inefficient way to create from a 2D-list of data a dict of dicts (two levels of keys) that returns a list of data. How to make this code more elegant, possibly faster and more readable? I guess using collection module but I didn't find a smart way.
Example:
...ANSWER
Answered 2021-Jun-15 at 07:35from itertools import groupby
first=lambda l: l[0]
def group_by_first(listo):
grouped = groupby(sorted(listo,key=first), key=first) # group by first elem, need to sort first
return {k: [e[1:] for e in g] for k,g in grouped} # remove key (first elem) from values
{k: group_by_first(l) for k,l in group_by_first(listo).items()} # group first elem and then by second
QUESTION
I am a complete newbie to smart pointers, and I have never dealt with weak_ptr in C++.
I have a function in class Y, that takes in as parameter a weak_ptr of class X.
Inside the function in class Y, I need to access the member functions of class X through the weak_ptr.
For reference, here is a rough class definition:
Y.cpp
...ANSWER
Answered 2021-Jun-15 at 06:21You need to convert it to a shared_ptr first, using .lock():
QUESTION
I'm looping through a multidimensional array and am left with some values.
This is the complete PHP code.
...ANSWER
Answered 2021-Jun-09 at 18:41This will reorder $array2 (into a new variable $final). First it assembles a simple array $people of the names, then it reassembles $array2 by prioritizing based on the $people array. Was this what you wanted to accomplish?
QUESTION
Hi I'm just confused that how to transact BEP-20 Token(e.g: Binance-Peg BUSD-T). I have simply transact bnb in Binance Smart Chain with this code:
...ANSWER
Answered 2021-Jun-14 at 08:58In order to use the .send({from: ...}) method, you need to
Have the
fromaccount unlocked on your provider.OR
Add its private key to the web3 account wallet (docs)
Ulocked provider account
This approach is mostly used on local providers (e.g. Ganache) that fund and unlock some accounts by default.
Keeping an unlocked account on a production provider is unwise, because anyone who queries the provider can send transactions.
Web3 account wallet
You need to pass the private key that generates the from address.
QUESTION
I have this code I have entered into Remix IDE, as ReceivedEther.sol, a standalone smart contract.
I've transferred 0.02 Ether to the smart contract, using MetaMask.
When I checked the smart contract's balance, it returns 200000000000000000, as expected.
If I try to use the transferEther function, however, and enter a number smaller than this - say, 0.005 ETH, or 50000000000000000 as the amount - it doesn't work using MetaMask.
When MetaMask prompts me it's never for that amount. It's for 0 ETH and 0.00322 gas fee (or whatever the gas is). Basically it always set the amount of ETH at 0 and only charges the fee.
Why can't I transfer an amount of ETH using this function in the Remix IDE with MetaMask?
...ANSWER
Answered 2021-Jun-13 at 21:44Your code sends ETH (stated in the _amount variable) from the smart contract to the _recipient. So it doesn't require any ETH to be sent in order to execute the transferEther() function.
If you want your contract to accept ETH, the function that accepts it (or the general fallback() or receive() function) needs to be marked as payable.
Example:
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