Ethereum janitor
It coerces any value to a boolean. Your inferior coworker probably wanted to use a straightforward and readable solution like Booleanor heaven ethereum janitor not even do any type conversion at all and ethereum janitor just let the if statement perform the implicit type conversion.
What can I say - this trade secret is not not the greatest thing since the linux kernel. That is the more obscure and ethereum janitor readable alternative to Date. The first was introduced to me by someone making a pull request to one of my old lame open source widgets or something.
The second has over 3k upvotes on stack overflow. One day not very long ago I was riding the bus. This was one of those days. I had no idea what conversation we were in or how we got there from the topic of reading books. They make good money. I nodded my head attentively. I was relishing this small part of ethereum janitor conversation that I could actually follow.
But higher paying jobs, they come with higher stress, you see. Each person gotta decide for themselves. I could be ethereum janitor else. I could make more money. But it would come with that higher stress, you know? Ethereum is a platform for creating decentralized web applications and network-enforced, code-based contracts.
At the heart of Ethereum is the concept of contracts. Contracts are a set of rules, described in computer code, which can be interacted with by users in the Ethereum network.
Users can interact with contracts by invoking public methods defined on ethereum janitor contracts; the methods can receive data from the user and return data back to the user if desired.
In this sense, the Ethereum network can be described as a giant virtual machine, on which the contracts operate as virtual programs. For those curious, this virtual machine is in fact Turing Complete.
This virtual machine is enforced by a blockchain ethereum janitor concept stolen unabashedly from Bitcoina public record of every change to the ethereum janitor of this machine. The blockchain is jointly ethereum janitor by all members of the Ethereum network which anyone can join by running the program on their machinemaking Ethereum decentralized. Ethereum janitor there is no single point of failure ethereum janitor this network, making it robust against any attempts to compromise it.
Command line tools are available which allow users to interact with contracts and ethereum janitor Ethereum network via the command line, but of course that is not very accessible to most users. Ethereum provides a Javascript API called Web3 which allows web applications to access the Ethereum network, when visited using an enhanced browser which supports the API.
Two examples of web3-compatible browsers are Mist and Metamask. Metamask is actually just a Google Chrome extension. What this means to general the user is that they can download Mist or add Metamask to Chrome and then use the provided interfaces there to connect to their own Ethereum accounts. This means that any mistakes made in ethereum janitor contract are permanent; the only way to fix them is to deploy a brand new contract with the fixes.
This is certainly an inconvenience, but it also adds an ethereum janitor property to the contracts: Because the code cannot be modified, the rules of the contract are strictly enforced by the Ethereum network itself.
All of this is certainly possible from a technical perspective. Making contracts useful in the real world, however, ethereum janitor more difficult. This is because contracts are just pieces of code, which can only access data within the Ethereum network. Ethereum on its own does not access data from the outside world, and certainly does not possess the capability to interpret that data in any meaningful way such as verifying the result of a sports game and executing payoffs to the winners of a bet based on that result.
Ethereum janitor world data can be fed into the network, but the contracts themselves need to handle all the complexity of validating and interpreting the data, or rely ethereum janitor an external mechanism to do so. This turns out to be a difficult problem, one which requires an entirely separate mechanism to be solved.
I will not discuss this problem any further here as my knowledge of it is quite limited, but I did want to mention it. Note that familiarity with node. Solidity is actually a programming language. Ethereum janitor is ethereum janitor language designed specifically for Ethereum contracts, and as such compiles to byte code which can be deployed directly to the Ethereum network.
Solidity is the ethereum janitor of choice for most people writing Ethereum contracts and is the language supported by Truffle. Testrpc ethereum janitor a node. This is useless for production, but very handy for development. You can deploy your contracts to testrpc and interact with them as if they were deployed to Ethereum. I had no luck with Mist when developing locally possibly ethereum janitor incompatibility with testrpcbut Metamask worked like a charm.
I recommend using Metamask. Although I ethereum janitor to install npm packages locally, the ethereum janitor way to get started is to install it globally: Note that testrpc requires node version 6. Ethereum janitor personally use nvm to easily switch between node versions.
Again, the simplest way to get Truffle is to install it as a global npm package: Create a folder for your project, cd into it, and then run 2 commands:. This will create a basic folder structure for your project and initialize it as a bare-bones demo application. If all goes well, you should be able to navigate to http: Try sending some coin to an address.
You can look at the output from when you started testrpc ethereum janitor get a list ethereum janitor addresses that were generated. That was easy enough, right? Now try implementing your own idea. It can be stupid simple ethereum janitor trivial. Write the contract in Solidity. The Solidity Browser is a nice tool for manually testing out your ethereum janitor as ethereum janitor write them. For formal automated tests, take a look at the tests in your demo project. Automated tests are wonderful and Truffle provides testing out of the box.
I highly recommend setting aside ethereum janitor to build at least 1 or 2 tests for your contract. Once you have the contract written and tested, you can proceed to create your frontend. Build it however you like: If you like using UI frameworks like Bootstrap, go for it.
If you like Javascript frameworks such as React, that works too. Thankfully, Truffle supports doing this with Webpack. There is a helpful tutorial here. I went beyond the boilerplate example in that project, so it might be useful as an example of a more complex use of Truffle. Some of the things I did include:. Become a coder Learn obscure language hacks that minimize readability and maximize references to internal language constructs and syntactic quirks.
Interacting with contracts Command line tools are available which allow users to interact with contracts and the Ethereum network via the command line, but of course that is not very accessible to most users. Install truffle Again, ethereum janitor simplest way to get Truffle is to install it as a global npm package: Create your project directory Create ethereum janitor folder for your project, cd into it, and then run 2 commands: Try running the demo application Try running Metacoin, the demo application.
Run the following commands: It will run on port Install the Chrome extension. Unlock your vault in Metamask. You can do this by copying the mnemonic that should have been displayed in the terminal after booting testrpc. It will look something like this: You can set the password to whatever you like.
Switch to the network localhost in Metamask at the time of this writing, the current network is displayed at the top left of the main screen in Metamask. Make it your own That was easy enough, right? Some of the things I did include: Using a more complex file structure Using a CSS framework Using React as a Ethereum janitor framework Integrating Webpack for a customized build Integrating my own Javascript tests using Mocha and Chai with the Truffle tests Creating an ethereum janitor script which seeds the test network with some sample data for development Things to ethereum janitor about How does the blockchain really work?
How robust is ethereum janitor What would it take to bring it down? How can we bridge the ethereum janitor between Ethereum and the real world in a way that is resistant to fraud? What is the future of the decentralized web?
Will it take off?